SLDN-03D1AX [BEL]
3 VDC â 14.4 VDC Input,;
| 型号： | SLDN-03D1AX |
| 厂家： | 
BEL FUSE INC. |
| 描述： | 3 VDC â 14.4 VDC Input, |
| 文件： | 总44页 (文件大小：1463K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
The SLDN-03D1Ax modules are non-isolated dc-dc converters that can
deliver up to 3A of output current. These modules operate over a wide
range of input voltage (Vin = 3 - 14.4 VDC) and provide a precisely
regulated output voltage from 0.45 VDC to 5.5 VDC, programmable via
an external resistor and Power Management Bus control.
Features include a digital interface using the Power Management Bus
protocol, remote On/Off, adjustable output voltage, over current and
overtemperature protection. The Power Management Bus interface
supports a range of commands to both control and monitor the module.
The module also includes the Tunable LoopTM feature that allows the
user to optimize the dynamic response of the converter to match the
load with reduced amount of output capacitance leading to savings on
cost and PWB area.
3 VDC – 14.4 VDC Input,
0.45 VDC - 5.5 VDC /3 A Output
•
•
(programmable from 0.6 to 5.5 VDC via external resistor)
Power Good signal
Remote On/Off
Over temperature protection
Ability to sink and source current
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
DOSA based
Digital interface through the Power Management Bus protocol
Tunable LoopTM to op timize dynamic output voltage response
Flexible output voltage sequencing EZ-SEQUENCE
Fixed switching frequency with capability of external synchronization
Output overcurrent protection (non-latching)
Small size: 12.2 x 12.2 x 6.25 mm (0.48 x 0.48 x 0.246 in)
Wide operating temperature range [-40°C to 85°C]
UL60950-1 Recognized (UL/cUL)
ISO 9001 and ISO 14001 certified manufacturing facilities
Compliant to IPC-9592 (September 2008), Category 2, Class II
Compliant to RoHS EU Directive 2002/95/EC
Compatible in a Pb-free or SnPb reflow environment
Distributed power architectures
Servers and storage applications
Intermediate bus voltage applications
Networking equipment
Telecommunications equipment
Industrial equipment
•
•
•
•
•
•
2
SLDN-03D1Ax
MAX. OUTPUT
CURRENT
MAX. OUTPUT
POWER
TYPICAL
EFFICIENCY
PART NUMBER
OUTPUT VOLTAGE
0.45 VDC – 5.5 VDC
INPUT VOLTAGE
SLDN-03D1A0 (Active High)
SLDN-03D1AL ((Active Low)
3 VDC – 14.4 VDC
3 A
16.5 W
94 %
NOTE: Add “G” suffix at the end of the model number to indicate Tray Packaging.
S
LDN
-
03
Output current
3 A
D
1A
0
x
Mounting type
Surface mount
Series code
SLDN series
Wide input voltage range
3-14.4V
Sequencing
Logic status
Package
With
sequencing
0 – active high
L – active low
G – Tray
R – Tape & Reel
PARAMETER
DESCRIPTION
MIN
-0.3
-
TYP
MAX
15
UNITS
Continuous Input Voltage
V
V
Voltage on SEQ, SYNC, VS+ terminal
7
Voltage on CLK, DATA, SMBALERT
terminal
-
3.6
V
Operating Ambient Temperature
Storage Temperature
Altitude
See Thermal Considerations section
-40
-55
-
85
C
C
m
125
2000
NOTE: Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings
only; functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the
data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
PARAMETER
DESCRIPTION
MIN
TYP
-
MAX
UNIT
V
Operating Input Voltage
Input Current (full load)
3
-
-
-
-
14.4
VIN = 3 V to 14 V
VO,set = 0.6 VDC
VO,set = 5 VDC
-
2.8
A
17.5
43
6.4
-
-
-
mA
mA
mA
VIN = 12 VDC,
IO = 0, module enabled
Input Current (no load)
Input Stand-by Current
VIN = 12 V, module disabled
5 Hz to 20 MHz, 1 μH source impedance,
VIN =0 to 14V, IO= IOmax ; See Test Configurations
Input Reflected Ripple Current (pk-pk)
-
100
-
mA
I2t Inrush Current Transient
-
-
-
1
-
A2s
dB
Input Ripple Rejection (120 Hz)
-57
NOTE: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
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3
SLDN-03D1Ax
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNIT
With 0.1% tolerance for external resistor used to set
output voltage
Output Voltage Set Point
-1.0
-
+1.0
%Vo,set
Over all operating input voltage, resistive load, and
temperature conditions until end of life
Output Voltage
-3.0
-
-
-
+3.0
3.0
%Vo,set
%Vo,set
%Vo,set
Output Voltage Overshoot
Power Management Bus
-25
0
+25
Adjustable Output Voltage Range
Power Management Bus Output
Voltage Adjustment Step Size
-
0.4
-
%Vo,set
1.Selected by an external resistor
2.Some output voltages may not be possible depending
on the input voltage – see Feature Descriptions Section
Adjustment Range
0.6
-
-
-
5.5
0.5
V
V
Remote Sense Range
Load Regulation
V
O ≥ 2.5 V IO = IO, min to IO, max
-
-
-
-
10
10
mV
mV
VO < 2.5 V
Line Regulation
V
O ≥ 2.5 V VIN = VIN, min to VIN, max
-
-
-
-
0.4
5
%Vo,set
mV
VO < 2.5 V
Temperature Regulation
Ripple and Noise (pk-pk)
Ripple and Noise (rms)
Tref=TA, min to TA, max
-
-
-
-
-
0.4
100
38
-
%Vo,set
50
mV
5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to IO, max Co =
0.1μF // 22 μF ceramic capacitors)
20
mV
Output Short-Circuit Current
Output Capacitance2
Vo≤250mV, Hiccup Mode
268
mArms
Without the Tunable LoopTM
With the Tunable LoopTM
With the Tunable LoopTM
10
22
22
-
-
-
22
1000
3000
uF
uF
uF
ESR ≥ 1 mΩ
ESR ≥ 0.15 mΩ
ESR ≥ 10 mΩ
Output Current
In either sink or source mode
0
-
-
3
-
A
Output Current Limit Inception
Current limit does not operate in sink mode
270
% Io,max
Case 1: On/Off input is enabled and then input power is
applied. (delay from instant at which VIN = VIN, min until
Vo = 10% of Vo, set
Case 2: Input power is applied for at least one second
and then the On/Off input is enabled (delay from instant at
which Von/Off is enabled until Vo = 10% of Vo, set)
-
0.4
-
ms
Turn-On Delay Times
(VIN=VIN, nom, IO=IO, max ,
VO to within ±1% of steady state)
-
-
0.4
2.4
-
-
ms
ms
Output voltage Rise time
Time for Vo to rise from 10% of Vo, set to 90% of Vo, set
NOTES:
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as getting the best transient
response. See the Tunable LoopTM section for details.
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Rev. D1.04.19
4
SLDN-03D1Ax
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNIT
Efficiency
Vo = 0.6 V
-
-
-
-
-
-
72.4
83.2
87.5
90.1
91.9
94.0
-
-
-
-
-
-
%
%
%
%
%
%
Vo = 1.2 V
Vo = 1.8 V
Vo = 2.5 V
Vo = 3.3 V
Vo = 5.0 V
Vin = 12 VDC, TA = 25°C
Io = Io, max, Vo= Vo,set
Switching Frequency
-
510
2.0
-
600
-
kHz
kHz
V
Synchronization Frequency Range
High-Level Input Voltage
Low-Level Input Voltage
Input Current, SYNC
-
-
-
-
720
-
0.4
100
V
-
nA
nS
nS
C
Minimum Pulse Width, SYNC
Maximum SYNC rise time
Over Temperature Protection
100
100
-
150
130
-
-
Over temperature Warning – Warning may not
activate before alarm and unit may shutdown
before warning
Power Management Bus Over Temperature
Warning Threshold
-
C
Power Management Bus Adjustable Input
Under Voltage Lockout Thresholds
Resolution of Adjustable Input Under Voltage
Threshold
2.5
-
-
-
14
V
500
mV
Input Undervoltage Lockout
Turn-on Threshold
-
-
-
2.71
2.41
0.3
-
-
-
V
V
V
Turn-off Threshold
Hysteresis
Tracking Accuracy
Power-Up: 2V/ms Vin, min to Vin, max; Io, min to Io, max, VSEQ < Vo
Power-Down: 2V/ms
-
-
-
-
100
100
mV
mV
PGOOD (Power Good)
%VO, set
%VO, set
%VO, set
%VO, set
Ω
Overvoltage threshold for PGOOD ON
Overvoltage threshold for PGOOD OFF
Undervoltage threshold for PGOOD ON
Undervoltage threshold for PGOOD OFF
Pulldown resistance of PGOOD pin
Sink current capability into PGOOD pin
-
-
-
-
-
-
108
110
92
90
-
-
-
-
-
50
5
Signal Interface Open Drain, Vsupply 5 Vdc
-
mA
Weight
-
0.96
-
g
Calculated MTBF (IO=0.8IO, max, TA=40°C)
Telecordia Issue 2 Method 1 Case 3
MTBF
19,508,839
hours
0.48 x 0.48 x 0.246
12.2 x 12.2 x 6.25
in
mm
Dimensions (L × W × H)
Power Management Bus Signal Interface Characteristics
Input High Voltage (CLK, DATA)
2.1
-
-
-
-
-
-
3.6
0.8
10
V
V
Input Low Voltage (CLK, DATA)
Input high level current (CLK, DATA)
-10
-10
-
uA
uA
V
Input low level current (CLK, DATA)
10
Output Low Voltage (CLK, DATA, SMBALERT#)
Iout = 2 mA
Vout = 3.6 V
0.4
Output high level open drain leakage current
(DATA, SMBALERT#)
0
-
-
0.7
-
10
uA
pF
Pin capacitance
-
400
-
Power Management Bus Operating frequency
range
10
kHz
ns
Data setup time
250
-
-
Receive Mode
Transmit Mode
0
300
Data hold time
-
ns
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SLDN-03D1Ax
Measurement System Characteristics
Read delay time
153
0
192
231
18
-
us
A
Output current measurement range
Output current measurement resolution
Output current measurement gain accuracy
Output current measurement offset
VOUT measurement range
-
62.5
-
-
mA
%
-
±5
0.1
5.5
-
-
-
A
0
-
V
VOUT measurement resolution
VOUT measurement gain accuracy
VOUT measurement offset
-
15.625
mV
%
-15
-3
3
-
15
3
-
%
VIN measurement range
-
14.4
-
V
VIN measurement resolution
-
32.5
mV
%
VIN measurement gain accuracy
VIN measurement offset
-15
-5.5
-
-
15
1.4
LSB
NOTE: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
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6
SLDN-03D1Ax
90
85
80
95
90
85
80
75
70
65
60
55
50
75
Vin=3.3V
Vin=3.3V
70
65
60
Vin=14V
Vin=14V
Vin=12V
Vin=12V
55
50
45
40
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, IO (A)
Vo = 0.6 V
Vo = 1.2 V
95
90
85
80
75
70
65
60
100
95
90
85
80
75
70
65
60
Vin=3.3V
Vin=4.5V
Vin=14V
Vin=14V
Vin=12V
Vin=12V
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, IO (A)
Vo = 1.8 V
Vo = 2.5 V
100
95
90
85
80
75
70
65
60
100
95
90
85
80
75
70
65
60
Vin=4.5V
Vin=7V
Vin=14V
Vin=14V
Vin=12V
Vin=12V
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
OUTPUT CURRENT, IO (A)
OUTPUT CURRENT, IO (A)
Vo = 3.3 V
Vo = 5.0 V
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7
SLDN-03D1Ax
3.5
3.0
3.5
3.0
2.5
2.0
1.5
0.5m/s
(100LFM)
0.5m/s
(100LFM)
Standard Part
NC
NC
(85°C)
2.5
Standard
Part (85 C)
Ruggedized (D)
Part (105°C)
Ruggedized (D)
Part (105°C)
2.0
1.5
55
55
55
65
75
85
95
105
55
55
45
65
75
85
95
105
105
105
AMBIENT TEMPERATURE, TA OC
AMBIENT TEMPERATURE, TA OC
Vo = 0.6 V
Vo = 1.2 V
3.5
3.0
2.5
2.0
1.5
3.5
3.0
2.5
2.0
1.5
0.5m/s
0.5m/s
(100LFM)
(100LFM)
NC
NC
Standard
Standard Part
(85°C)
Part (85°C)
Ruggedized (D)
Part (105°C)
Ruggedized (D)
Part (105°C)
65
75
85
95
105
65
75
85
95
AMBIENT TEMPERATURE, TA OC
AMBIENT TEMPERATURE, TA OC
Vo = 1.8 V
Vo = 2.5 V
3.5
3.0
2.5
2.0
1.5
3.5
3.0
2.5
2.0
1.5
0.5m/s
1m/s
(200LFM)
(100LFM)
NC
NC
Standard
Standard
0.5m/s
(100LFM)
Part (85°C)
Part (85°C)
Ruggedized (D)
Part (105°C)
Ruggedized (D)
Part (105°C)
55
65
75
85
95
65
75
85
95
105
AMBIENT TEMPERATURE, TA OC
AMBIENT TEMPERATURE, TA OC
Vo = 3.3 V
Vo = 5.0 V
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SLDN-03D1Ax
TIME, t (1s/div)
TIME, t (1s/div)
Vo=0.6V, Io = Io,max
Vo=1.2V, Io = Io,max
TIME, t (1s/div)
TIME, t (1s/div)
Vo=1.8V, Io = Io,max
Vo=2.5V, Io = Io,max
TIME, t (1s/div)
TIME, t (1s/div)
Vo=3.3V, Io = Io,max
Vo=5.0V, Io = Io,max
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9
SLDN-03D1Ax
TIME, t (20s /div)
TIME, t (20s /div)
Transient Response to Dynamic Load Change from 50% to 100% at
12Vin, Cout= 1x47uF+2x330uF, CTune=27nF, RTune=180. Vo=0.6V
Transient Response to Dynamic Load Change from 50% to 100% at
12Vin, Cout= 1x47uF+1x330uF, CTune=10nF & RTune=267. Vo=1.2V
TIME, t (20s /div)
TIME, t (20s /div)
Transient Response to Dynamic Load Change from 50% to 100% at
12Vin, Cout= 1x47uF +1x330uF, CTune=10nF & RTune=267. Vo=1.8V
Transient Response to Dynamic Load Change from 50% to 100% at
12Vin, Cout= 2x47uF, CTune=2700pF & RTune=267. Vo=2.5V
TIME, t (20s /div)
TIME, t (20s /div)
Transient Response to Dynamic Load Change from 50% to 100% at
12Vin, Cout= 2x47uF, CTune=2200pF & RTune=267. Vo=3.3V
Transient Response to Dynamic Load Change from 50% to 100% at
12Vin, Cout= 1x47uF, CTune=820pF & RTune=267. Vo=5.0V
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10
SLDN-03D1Ax
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=0.6V
Start-up Using On/Off Voltage (Io = Io,max), Vo=1.2V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=1.8V
Start-up Using On/Off Voltage (Io = Io,max), Vo=2.5V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=3.3V
Start-up Using On/Off Voltage (Io = Io,max), Vo=5.0V
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11
SLDN-03D1Ax
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=0.60V
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=1.2V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=1.8V
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=2.5V
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=3.3V
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=5.0V
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12
SLDN-03D1Ax
The SLDN-03D1Ax module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of
the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage
and ensure module stability. High frequency switching noise can be reduced by using suitable decoupling ceramic caps. Refer to
AN04-006 and AN04-002 for more guidelines.
To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Figure 37 shows the input ripple
voltage for various output voltages at 3A of load current with 1x22 µF or 2x22 µF ceramic capacitors and an input of 12V.
Figure 37
Note: Input ripple voltage for various output voltages with 2x22 µF or 3x22 µF ceramic capacitors at the input (3A load). Input voltage
is 12V.
These modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 µF ceramic
and 22 µF ceramic capacitors at the output of the module. However, additional output filtering may be required by the system designer
for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic
response characteristics may need to be customized to a particular load step change.
To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be
used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. Figure 38
provides output ripple information for different external capacitance values at various Vo and a full load current of 3A. For stable
operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification
table. Optimal performance of the module can be achieved by using the Tunable LoopTM feature described later in this data sheet.
Figure 38
Note: Output ripple voltage for various output voltages with external 1x10 µF, 1x22 µF, 1x47 µF or 2x47 µF ceramic capacitors at the
output (3A load). Input voltage is 12V.
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Rev. D1.04.19
13
SLDN-03D1Ax
For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the
end-use safety agency standards, i.e., UL 60950-1 2nd, CSA C22.2 No. 60950-1-07, DIN EN 60950-1:2006 + A11 (VDE0805 Teil 1 +
A11):2009-11; EN 60950-1:2006 + A11:2009-03.
For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV
requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV.
The input to these units is to be provided with a slow-blow fuse with a maximum rating of 5 A in the positive input lead.
PARAMETER
DESCRIPTION
MIN
-0.2
2.0
TYP
MAX
0.6
UNIT
Signal Low (Unit On)
Signal High (Unit Off)
Signal Low (Unit Off)
Signal High (Unit On)
-
-
-
-
V
V
V
V
Active Low
Active High
The remote on/off pin open, Unit on.
Vin,max
0.6
-0.2
2.0
The remote on/off pin open, Unit on.
Vin,max
The SLDN-03D1Ax module can be turned ON and OFF either by using the ON/OFF pin or through the Power Management Bus
interface (Digital). The module can be configured in a number of ways through the Power Management Bus interface to react to the
two ON/OFF inputs:
•
•
•
Module ON/OFF can be controlled only through the analog interface (digital interface ON/OFF commands are ignored).
Module ON/OFF can be controlled only through the Power Management Bus interface (analog interface is ignored).
Module ON/OFF can be controlled by either the analog or digital interface.
The default state of the module (as shipped from the factory) is to be controlled by the analog interface only. If the digital interface is
to be enabled, or the module is to be controlled only through the digital interface, this change must be made through the Power
Management Bus. These changes can be made and written to non-volatile memory on the module so that it is remembered for
subsequent use.
The SLDN-03D1Ax modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available. In the Positive
Logic On/Off option, (device code suffix “0” – see Ordering Information), the module turns ON during a logic High on the On/Off pin
and turns OFF during a logic Low. With the Negative Logic On/Off option, (device code suffix “L” – see Ordering Information), the
module turns OFF during logic High and ON during logic Low. The On/Off signal should be always referenced to ground. For either
On/Off logic option, leaving the On/Off pin disconnected will turn the module ON when input voltage is present.
For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 39. When the external transistor Q2 is
in the OFF state, the internal transistor Q1 is turned ON, and the internal PWM #Enable signal is pulled low causing the module to be
ON. When transistor Q2 is turned ON, the On/Off pin is pulled low and the module is OFF. A suggested value for Rpullup is 20k
For negative logic On/Off modules, the circuit configuration is shown in Fig. 40. The On/Off pin should be pulled high with an external
pull-up resistor (suggested value for the 3V to 14V input range is 20Kohms). When transistor Q2 is in the OFF state, the On/Off pin is
pulled high, transistor Q1 is turned ON and the module is OFF. To turn the module ON, Q2 is turned ON pulling the On/Off pin low,
turning transistor Q1 OFF resulting in the PWM Enable pin going high.
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DLYNX MODULE
DLYNX MODULE
+3. 3V
+VIN
+3. 3V
+VIN
Rpullup
I
10K
ENABLE
Rpullup
10K
ENABLE
ON/OFF
I
22K
22K
ON/OFF
Q1
Q1
+
+
Q2
Q2
V
22K
V
22K
ON/OFF
ON/OFF
_
_
GND
GND
Figure 39. Circuit configuration for using positive On/Off logic
Figure 40. Circuit configuration for using negative On/Off logic
Please see the Digital Feature Descriptions section.
The SLDN-03D1Ax module has monotonic start-up and shutdown behavior for any combination of rated input voltage, output current
and operating temperature range.
The SLDN-03D1Ax module can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage.
The output voltage of the module is programmable to any voltage from 0.6dc to 5.5Vdc by connecting a resistor between the Trim
and SIG_GND pins of the module. Certain restrictions apply on the output voltage set point depending on the input voltage. These
are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Fig. 41. The Upper Limit curve shows that for output voltages
lower than 1V, the input voltage must be lower than the maximum of 14.4V. The Lower Limit curve shows that for output voltages
higher than 0.6V, the input voltage needs to be larger than the minimum of 3V.
16
14
12
Upper
10
8
6
4
Lower
4
2
0
0.5
1
1.5
2
2.5
3
3.5
4.5
5
5.5
6
Output Voltage (V)
Figure 41
Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages.
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VIN(+)
VO(+)
VS+
ON/OFF
LOAD
TRIM
Rtrim
SIG_GND
VS─
Figure 42.
Caution – Do not connect SIG_GND to GND elsewhere in the layout
Circuit configuration for programming output voltage using an external resistor.
Without an external resistor between Trim and SIG_GND pins, the output of the module will be 0.6 Vdc.To calculate the value of the
trim resistor, Rtrim for a desired output voltage, should be as per the following equation:
12
Vo − 0.6
Rtrim =
k
Rtrim is the external resistor in kΩ
Vo is the desired output voltage.
Rtrim (KΩ)
Open
40
VO, set (V)
0.6
0.9
1.0
30
1.2
20
1.5
13.33
10
1.8
2.5
6.316
4.444
2.727
3.3
5.0
Table 1 Rtrim values required for some common output voltages.
Please see the Digital Feature Descriptions section.
The SLDN-03D1Ax power module has a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage
between the sense pins (VS+ and VS-). The voltage drop between the sense pins and the VOUT and GND pins of the module should
not exceed 0.5V.
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Output voltage margining can be implemented in the module by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin
for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to output pin for margining-down.
Figure 43 shows the circuit configuration for output voltage margining. Please consult your local Bel Power technical representative
for additional details.
Figure 43. Circuit Configuration for margining Output voltage
Please see the Digital Feature Descriptions section.
The SLDN-03D1Ax module includes a sequencing feature, EZ-SEQUENCE that enables users to implement various types of output
voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing
feature, leave it unconnected.
The voltage applied to the SEQ pin should be scaled down by the same ratio as used to scale the output voltage down to the reference
voltage of the module. This is accomplished by an external resistive divider connected across the sequencing voltage before it is fed
to the SEQ pin as shown in Fig. 44. In addition, a small capacitor (suggested value 100pF) should be connected across the lower
resistor R1.
For SLDN-03D1Ax modules, the minimum recommended delay between the ON/OFF signal and the sequencing signal is 10ms to
ensure that the module output is ramped up according to the sequencing signal. This ensures that the module soft-start routine is
completed before the sequencing signal is allowed to ramp up.
Figure 44. Circuit showing connection of the sequencing signal to the SEQ pin
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When the scaled down sequencing voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches
the set-point voltage. The final value of the sequencing voltage must be set higher than the set-point voltage of the module. The
output voltage follows the sequencing voltage on a one-to-one basis. By connecting multiple modules together, multiple modules can
track their output voltages to the voltage applied on the SEQ pin.
To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output voltage of the
modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input voltage must be maintained until the
tracking and output voltages reach ground potential. Note that in all digital Bel series of modules, the Power Management Bus Output
Undervoltage Fault will be tripped when sequencing is employed. This will be detected using the STATUS_WORD and STATUS_VOUT
Power Management Bus commands. In addition, the SMBALERT# signal will be asserted low as occurs for all faults and warnings. To
avoid the module shutting down due to the Output Undervoltage Fault, the module must be set to continue operation without
interruption as the response to this fault (see the description of the Power Management Bus command VOUT_UV_FAULT_RESPONSE
for additional information).
To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure
current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the
output current is brought back into its specified range.
Please see the Digital Feature Descriptions section.
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shut down if the
overtemperature threshold of 15°C (typ) is exceeded at the thermal reference point Tref. Once the unit goes into thermal shutdown it
will then wait to cool before attempting to restart.
Please see the Digital Feature Descriptions section.
Please see the Digital Feature Descriptions section.
At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at an
input voltage above the undervoltage lockout turn-on threshold.
Please see the Digital Feature Descriptions section.
Please see the Digital Feature Descriptions section.
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The SLDN-03D1Ax module switching frequency can be synchronized to a signal with an external frequency within a specified range.
Synchronization can be done by using the external signal applied to the SYNC pin of the module as shown in Fig. 45, with the converter
being synchronized by the rising edge of the external signal. The Electrical Specifications table specifies the requirements of the
external SYNC signal. If the SYNC pin is not used, the module should free run at the default switching frequency. If synchronization is
not being used, connect the SYNC pin to GND.
MODULE
SYNC
+
─
GND
Figure 45. External source connections to synchronize switching frequency of the module.
Please see the Digital Feature Descriptions section.
Identical dimensions and pin layout of Analog and Digital modules permit migration from one to the other without needing to change
the layout. To support this, 2 separate Trim Resistor locations have to be provided in the layout. As shown in Fig. 46, for the digital
modules, the resistor is connected between the TRIM pad and SGND and in the case of the analog module it is connected between
TRIM and GND.
MODULE
TRIM
Rtrim1
for
Digital
Rtrim2
for
Analog
(PVX003 / PDT003)
SIG_GND
GND(Pin 7)
Figure 46. Layout to support either Analog or Digital on the same pad.
Caution – For digital modules, do not connect SIG_GND to GND elsewhere in the layout
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The SLDN-03D1Ax module has a feature that optimizes transient response of the module called Tunable LoopTM
.
External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise (see Figure 38)
and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external
capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response.
Larger values of external capacitance could also cause the module to become unstable.
The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network connected to the output of
the module. The Tunable LoopTM is implemented by connecting a series R-C between the VS+ and TRIM pins of the module, as shown
in Fig. 47. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module.
VOUT
VS+
RTune
CO
MODULE
CTune
TRIM
RTrim
SIG_GND
GND
Figure 47. Circuit diagram showing connection of RTUME and CTUNE to tune the control loop of the module.
Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2 and 3. Table 2 shows the
recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 1000uF that might be needed for an
application to meet output ripple and noise requirements. Selecting RTUNE and CTUNE according to Table 2 will ensure stable operation
of the module. In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance
will be required. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some
common output voltages in the presence of a 0A to 1.5A step change (50% of full load), with an input voltage of 12V.
Please contact your Bel Power technical representative to obtain more details of this feature as well as for guidelines on how to select
the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance
values.
Co
1x47F
270
2x47F
220
4x47F
180
6x47F
180
10x47F
180
RTUNE
CTUNE
1500pF
1800pF
3300pF
4700pF
4700pF
Table 2. General recommended values of of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor combinations.
Vo
Co
5V
3.3V
1x47F
220
2.5V
1.8V
1.2V
0.6V
1x47F
270
2x47F 1x330F (Polymer) 1x330F (Polymer) 2x330F (Polymer)
RTUNE
CTUNE
V
180
180
180
180
33nF
10mV
1500pF
68mV
1800pF
60mV
3300pF
37mV
8200pF
18mV
8200pF
18mV
Table 3. Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 1.5A step load with Vin=12V.
Note: The capacitors used in the Tunable Loop tables are 47 μF/3 mΩ ESR ceramic and 330 μF/12 mΩ ESR polymer capacitors.
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The SLDN-03D1Ax modules have a Power Management Bus interface that supports both communication and control. The modules
support a subset of version 1.1 of the specification (see Table 6 for a list of the specific commands supported). Most module
parameters can be programmed using Power Management Bus and stored as defaults for later use.\
All communication over the module Power Management Bus interface must support the Packet Error Checking (PEC) scheme. The
Power Management Bus master must generate the correct PEC byte for all transactions and check the PEC byte returned by the
module.
The module also supports the SMBALERT response protocol whereby the module can alert the bus master if it wants to talk. For more
information on the SMBus alert response protocol, see the System Management Bus (SMBus) specification.
The module has non-volatile memory that is used to store configuration settings. Not all settings programmed into the device are
automatically saved into this non-volatile memory, only those specifically identified as capable of being stored can be saved (see Table
6 for which command parameters can be saved to non-volatile storage).
For commands that set thresholds, voltages or report such quantities, the module supports the “Linear” data format among the three
data formats supported by Power Management Bus. The Linear Data Format is a two-byte value with an 11-bit, two’s complement
mantissa and a 5-bit, two’s complement exponent. The format of the two data bytes is shown below:
Data Byte High
Data Byte Low
7 6 5 4 3
2 1 0 7 6 5 4 3 2 1 0
Exponent
MSB
Mantissa
MSB
The value is of the number is then given by
Value = Mantissa x 2 Exponent
The SLDN-03D1Ax module can be addressed through the Power Management Bus using a device address. The module has 64
possible addresses (0 to 63 in decimal) which can be set using resistors connected from the ADDR0 and ADDR1 pins to SIG_GND.
Note that some of these addresses (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 12, 40, 44, 45, 55 in decimal) are reserved according to the SMBus
specifications and may not be useable. The address is set in the form of two octal (0 to 7) digits, with each pin setting one digit. The
ADDR1 pin sets the high order digit and ADDR0 sets the low order digit. The resistor values suggested for each digit are shown in
Table 4 (1% tolerance resistors are recommended). Note that if either address resistor value is outside the range specified in Table 4,
the module will respond to address 127.
Resistor Value (KΩ)
Digit
0
1
2
3
4
5
6
7
10
15.4
23.7
36.5
54.9
84.5
130
200
Table 4
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The user must know which I2C addresses are reserved in a system for special functions and set the address of the module to avoid
interfering with other system operations. Both 100kHz and 400kHz bus speeds are supported by the module. Connection for the Power
Management Bus interface should follow the High Power DC specifications given in section 3.1.3 in the SMBus specification V2.0 for
the 400kHz bus speed or the Low Power DC specifications in section 3.1.2. The complete SMBus specification is available from the
SMBus web site, smbus.org.
ADDR1
ADDR0
RADDR0
RADDR1
SIG_GND
Figure 48. Circuit showing connection of resistors used to set the Power Management Bus address of the module.
The SLDN-03D1Ax module can also be turned on and off via the Power Management Bus interface. The OPERATION command is
used to actually turn the module on and off via the Power Management Bus, while the ON_OFF_CONFIG command configures the
combination of analog ON/OFF pin input and Power Management Bus commands needed to turn the module on and off. Bit [7] in the
OPERATION command data byte enables the module, with the following functions:
0
:
Output is disabled
1
:
Output is enabled
This module uses the lower five bits of the ON_OFF_CONFIG data byte to set various ON/OFF options as follows:
Bit Position
Access
4
r/w
PU
1
3
r/w
CMD
0
2
r/w
CPR
1
1
r/w
POL
1
0
r
Function
CPA
1
Default Value
PU: Sets the default to either operate any time input power is present or for the ON/OFF to be controlled by the analog ON/OFF input
and the Power Management Bus OPERATION command. This bit is used together with the CP, CMD and ON bits to determine startup.
Bit Value Action
0
1
Module powers up any time power is present regardless of state of the analog ON/OFF pin
Module does not power up until commanded by the analog ON/OFF pin and the OPERATION
command as programmed in bits [2:0] of the ON_OFF_CONFIG register.
CMD: The CMD bit controls how the device responds to the OPERATION command.
Bit Value Action
0
1
Module ignores the ON bit in the OPERATION command
Module responds to the ON bit in the OPERATION command
CPR: Sets the response of the analog ON/OFF pin. This bit is used together with the CMD, PU and ON bits to determine startup.
Bit Value Action
Module ignores the analog ON/OFF pin, i.e. ON/OFF is only controlled through the Power
Management Bus via the OPERATION command
0
1
Module requires the analog ON/OFF pin to be asserted to start the unit
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The soft start rise time can be adjusted in the module via Power Management Bus. When setting this parameter, make sure that the
charging current for output capacitors can be delivered by the module in addition to any load current to avoid nuisance tripping of the
overcurrent protection circuitry during startup. The TON_RISE command sets the rise time in ms, and allows choosing soft start times
between 600μs and 9ms, with possible values listed in Table 5. Note that the exponent is fixed at -4 (decimal) and the upper two bits
of the mantissa are also fixed at 0.
Rise Time
600μs
900μs
1.2ms
1.8ms
2.7ms
4.2ms
6.0ms
9.0ms
Exponent
11100
11100
11100
11100
11100
11100
11100
11100
Mantissa
00000001010
00000001110
00000010011
00000011101
00000101011
00001000011
00001100000
00010010000
Table 5. Output Voltage Adjustment Using the Power Management Bus
The VOUT_SCALE_LOOP parameter is important for a number of Power Management Bus commands related to output voltage
trimming, margining, over/under voltage protection and the PGOOD thresholds. The output voltage of the module is set as the
combination of the voltage divider formed by RTrim and a 20kΩ upper divider resistor inside the module, and the internal reference
voltage of the module. The reference voltage VREF is nominally set at 600mV, and the output regulation voltage is then given by
20000+ RTrim
VOUT
=
VREF
RTrim
Hence the module output voltage is dependent on the value of RTrim which is connected external to the module. The information on
RTrim
VOUT _ SCALE _ LOOP =
20000+ RTrim
the output voltage divider ratio is conveyed to the module through the VOUT_SCALE_LOOP parameter which is calculated as follows:
The VOUT_SCALE_LOOP parameter is specified using the “Linear” format and two bytes. The upper five bits [7:3] of the high byte are
used to set the exponent which is fixed at –9 (decimal). The remaining three bits of the high byte [2:0] and the eight bits of the lower
byte are used for the mantissa. The default value of the mantissa is 00100000000 corresponding to 256 (decimal), corresponding to a
divider ratio of 0.5. The maximum value of the mantissa is 512 corresponding to a divider ratio of 1. Note that the resolution of the
VOUT_SCALE_LOOP command is 0.2%.
When Power Management Bus commands are used to trim or margin the output voltage, the value of VREF is what is changed inside
the module, which in turn changes the regulated output voltage of the module.
The nominal output voltage of the module can be adjusted with a minimum step size of 0.4% over a ±25% range from nominal using
the VOUT_TRIM command over the Power Management Bus.
The VOUT_TRIM command is used to apply a fixed offset voltage to the output voltage command value using the “Linear” mode with
the exponent fixed at –10 (decimal). The value of the offset voltage is given by
VOUT (offset ) =VOUT _TRIM 2−10
This offset voltage is added to the voltage set through the divider ratio and nominal VREF to produce the trimmed output voltage. The
valid range in two’s complement for this command is –4000h to 3FFFh. The high order two bits of the high byte must both be either
0 or 1. If a value outside of the +/-25% adjustment range is given with this command, the module will set it’s output voltage to the
nominal value (as if VOUT_TRIM had been set to 0), assert SMBALRT#, set the CML bit in STATUS_BYTE and the invalid data bit in
STATUS_CML.
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The SLDN-03D1Ax module can also have its output voltage margined via Power Management Bus commands. The command
VOUT_MARGIN_HIGH sets the margin high voltage, while the command VOUT_MARGIN_LOW sets the margin low voltage. Both the
VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW commands use the “Linear” mode with the exponent fixed at –10 (decimal). Two
bytes are used for the mantissa with the upper bit [7] of the high byte fixed at 0. The actual margined output voltage is a combination
of the VOUT_MARGIN_HIGH or VOUT_MARGIN_LOW and the VOUT_TRIM values as shown below:
VOUT (MH )
=
(VOUT _ MARGIN _ HIGH +VOUT _TRIM ) 2−10
VOUT (ML)
=
(VOUT _ MARGIN _ LOW + VOUT _TRIM ) 2−10
Note that the sum of the margin and trim voltages cannot be outside the ±25% window around the nominal output voltage. The data
associated with VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW can be stored to non-volatile memory using the
STORE_DEFAULT_ALL command.
The module is commanded to go to the margined high or low voltages using the OPERATION command. Bits [5:2] are used to enable
margining as follows:
00XX
0101
0110
1001
1010
:
:
:
:
:
Margin Off
Margin Low (Ignore Fault)
Margin Low (Act on Fault)
Margin High (Ignore Fault)
Margin High (Act on Fault)
The SLDN-03D1Ax module can provide an overcurrent warning via the Power Management Bus. The threshold for the overcurrent
warning can be set using the parameter IOUT_OC_WARN_LIMIT. This command uses the “Linear” data format with a two byte data
word where the upper five bits [7:3] of the high byte represent the exponent and the remaining three bits of the high byte [2:0] and the
eight bits in the low byte represent the mantissa. The exponent is fixed at – 1(decimal). The upper six bits of the mantissa are fixed at
0 while the lower five bits are programmable with a default value of 5A. The resolution of this warning limit is 500mA.The value of the
IOUT_OC_WARN_LIMIT can be stored to non-volatile memory using the STORE_DEFAULT_ALL command.
The SLDN-03D1Ax module can provide information related to temperature of the module through the STATUS_TEMPERATURE
command. The command returns information about whether the pre-set over temperature fault threshold and/or the warning threshold
have been exceeded.
The SLDN-03D1Ax module has output over and under voltage protection capability. The Power Management Bus command
VOUT_OV_FAULT_LIMIT is used to set the output over voltage threshold from four possible values: 108%, 110%, 112% or 115% of
the commanded output voltage. The command VOUT_UV_FAULT_LIMIT sets the threshold that causes an output under voltage fault
and can also be selected from four possible values: 92%, 90%, 88% or 85%. The default values are 112% and 88% of commanded
output voltage. Both commands use two data bytes formatted as two’s complement binary integers. The “Linear” mode is used with
the exponent fixed to –10 (decimal) and the effective over or under voltage trip points given by
VOUT (OV _ REQ ) = (VOUT _ OV _ FAULT _ LIMIT) 2−10
VOUT (UV _ REQ ) = (VOUT _UV _ FAULT _ LIMIT) 2−10
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Values within the supported range for over and undervoltage detection thresholds will be set to the nearest fixed percentage. Note
that the correct value for VOUT_SCALE_LOOP must be set in the module for the correct over or under voltage trip points to be
calculated.
In addition to adjustable output voltage protection, the 3A Digital module can also be programmed for the response to the fault. The
VOUT_OV_FAULT RESPONSE and VOUT_UV_FAULT_RESPONSE commands specify the response to the fault. Both these
commands use a single data byte with the possible options as shown below.:
1. Continue operation without interruption (Bits [7:6] = 00, Bits [5:3] = xxx).
2. Continue for four switching cycles and then shut down if the fault is still present, followed by no restart or continuous restart
(Bits [7:6] = 01, Bits [5:3] = 000 means no restart, Bits [5:3] = 111 means continuous restart).
3. Immediate shut down followed by no restart or continuous restart (Bits [7:6] = 10, Bits [5:3] = 000 means no restart, Bits [5:3] =
111 means continuous restart).
4. Module output is disabled when the fault is present, and the output is enabled when the fault no longer exists (Bits [7:6] = 11,
Bits [5:3] = xxx).
Note that separate response choices are possible for output over voltage or under voltage faults.
The SLDN-03D1Ax module allows adjustment of the input under voltage lockout and hysteresis. The command VIN_ON allows setting
the input voltage turn on threshold, while the VIN_OFF command sets the input voltage turn off threshold. For the VIN_ON command,
possible values are 2.75V, and 3V to 14V in 0.5V steps. For the VIN_OFF command, possible values are 2.5V to 14V in 0.5V steps. If
other values are entered for either command, they will be mapped to the closest of the allowed values.
VIN_ON must be set higher than VIN_OFF. Attempting to write either VIN_ON lower than VIN_OFF or VIN_OFF higher than VIN_ON
results in the new value being rejected, SMBALERT being asserted along with the CML bit in STATUS_BYTE and the invalid data bit
in STATUS_CML.
Both the VIN_ON and VIN_OFF commands use the “Linear” format with two data bytes. The upper five bits represent the exponent
(fixed at -2) and the remaining 11 bits represent the mantissa. For the mantissa, the four most significant bits are fixed at 0.
The SLDN-03D1Ax module provides a Power Good (PGOOD) signal that is implemented with an open-drain output to indicate that the
output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition
such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going outside the specified
thresholds. The PGOOD thresholds are user selectable via the Power Management Bus (the default values are as shown in the Feature
Specifications Section). Each threshold is set up symmetrically above and below the nominal value. The POWER_GOOD_ON command
sets the output voltage level above which PGOOD is asserted (lower threshold). For example, with a 1.2V nominal output voltage, the
POWER_GOOD_ON threshold can set the lower threshold to 1.14 or 1.1V. Doing this will automatically set the upper thresholds to
1.26 or 1.3V.
The POWER_GOOD_OFF command sets the level below which the PGOOD command is de-asserted. This command also sets two
thresholds symmetrically placed around the nominal output voltage. Normally, the POWER_GOOD_ON threshold is set higher than
the POWER_GOOD_OFF threshold.
Both POWER_GOOD_ON and POWER_GOOD_OFF commands use the “Linear” format with the exponent fixed at –10 (decimal). The
two thresholds are given by
VOUT (PGOOD _ ON ) = (POWER _ GOOD _ ON) 2−10
VOUT (PGOOD _ OFF ) = (POWER _ GOOD _ OFF) 2−10
Both commands use two data bytes with bit [7] of the high byte fixed at 0, while the remaining bits are r/w and used to set the mantissa
using two’s complement representation. Both commands also use the VOUT_SCALE_LOOP parameter so it must be set correctly.
The default value of POWER_GOOD_ON is set at 1.1035V and that of the POWER_GOOD_OFF is set at 1.08V. The values associated
with these commands can be stored in non-volatile memory using the STORE_DEFAULT_ALL command.
The PGOOD terminal can be connected through a pullup resistor (suggested value 100 K) to a source of 5 VDC or lower.
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SLDN-03D1Ax
The SLDN-03D1Ax module is capable of measuring key module parameters such as output current and voltage and input voltage and
providing this information through the Power Management Bus interface. Roughly every 200μs, the module makes 16 measurements
each of output current, voltage and input voltage. Average values of of these 16 measurements are then calculated and placed in the
appropriate registers. The values in the registers can then be read using the Power Management Bus interface.
The SLDN-03D1Ax module measures current by using the inductor winding resistance as a current sense element. The inductor
winding resistance is then the current gain factor used to scale the measured voltage into a current reading. This gain factor is the
argument of the IOUT_CAL_GAIN command and consists of two bytes in the linear data format. The exponent uses the upper five bits
[7:3] of the high data byte in two-s complement format and is fixed at –15 (decimal). The remaining 11 bits in two’s complement binary
format represent the mantissa.
The current measurement accuracy is also improved by each module being calibrated during manufacture with the offset in the current
reading. The IOUT_CAL_OFFSET command is used to store and read the current offset. The argument for this command consists of
two bytes composed of a 5-bit exponent (fixed at -4d) and a 11-bit mantissa. This command has a resolution of 62.5mA and a range
of -4000mA to +3937.5mA.
The READ_IOUT command provides module average output current information. This command only supports positive or current
sourced from the module. If the converter is sinking current a reading of 0 is provided. The READ_IOUT command returns two bytes
of data in the linear data format. The exponent uses the upper five bits [7:3] of the high data byte in two-s complement format and is
fixed at –4 (decimal). The remaining 11 bits in two’s complement binary format represent the mantissa with the 11th bit fixed at 0 since
only positive numbers are considered valid.
Note that the current reading provided by the module is not corrected for temperature. The temperature corrected current reading for
module temperature TModule can be estimated using the following equation
푰푹푬푨푫_푶푼푻
푰푶푼푻,푪푶푹푹
=
[( ]
)
ퟏ + 푻푰푵푫 − ퟑퟎ × ퟎ. ퟎퟎퟑퟗퟑ
where IOUT_CORR is the temperature corrected value of the current measurement, IREAD_OUT is the module current measurement value, TIND
is the temperature of the inductor winding on the module. Since it may be difficult to measure TIND, it may be approximated by an
estimate of the module temperature.
The SLDN-03D1Ax module can provide output voltage information using the READ_VOUT command. The command returns two bytes
of data all representing the mantissa while the exponent is fixed at -10 (decimal).
During manufacture of the module, offset and gain correction values are written into the non-volatile memory of the module. The
command VOUT_CAL_OFFSET can be used to read and/or write the offset (two bytes consisting of a 16-bit mantissa in two’s
complement format) while the exponent is always fixed at -10 (decimal). The allowed range for this offset correction is -125 to 124mV.
The command VOUT_CAL_GAIN can be used to read and/or write the gain correction - two bytes consisting of a five-bit exponent
(fixed at -8) and a 11-bit mantissa. The range of this correction factor is -0.125V to +0.121V, with a resolution of 0.004V. The corrected
output voltage reading is then given by:
VOUT (Final) =
[VOUT (Initial) (1+VOUT _ CAL _ GAIN )]
+VOUT _ CAL _ OFFSET
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SLDN-03D1Ax
The SLDN-03D1Ax module can provide output voltage information using the READ_VIN command. The command returns two bytes
of data in the linear format. The upper five bits [7:3] of the high data form the two’s complement representation of the mantissa which
is fixed at –5 (decimal). The remaining 11 bits are used for two’s complement representation of the mantissa, with the 11th bit fixed at
zero since only positive numbers are valid.
During module manufacture, offset and gain correction values are written into the non-volatile memory of the module. The command
VIN_CAL_OFFSET can be used to read and/or write the offset - two bytes consisting of a five-bit exponent (fixed at -5) and a11-bit
mantissa in two’s complement format. The allowed range for this offset correction is -2 to 1.968V, and the resolution is 32mV. The
command VIN_CAL_GAIN can be used to read and/or write the gain correction - two bytes consisting of a five-bit exponent (fixed at
-8) and a 11-bit mantissa. The range of this correction factor is -0.125V to +0.121V, with a resolution of 0.004V. The corrected output
voltage reading is then given by:
VIN (Final) =
[VIN (Initial) (1+VIN _ CAL _ GAIN )]
+VIN _ CAL _ OFFSET
The SLDN-03D1Ax module supports a number of status information commands implemented in Power Management Bus. However,
not all features are supported in these commands. A 1 in the bit position indicates the fault that is flagged.
STATUS_BYTE : Returns one byte of information with a summary of the most critical device faults.
Bit Position
Flag
X
Default Value
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
OFF
VOUT Overvoltage
IOUT Overcurrent
VIN Undervoltage
Temperature
CML (Comm. Memory Fault)
None of the above
STATUS_WORD : Returns two bytes of information with a summary of the module’s fault/warning conditions.
Low Byte
Bit Position
Flag
X
Default Value
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
OFF
VOUT Overvoltage
IOUT Overcurrent
VIN Undervoltage
Temperature
CML (Comm. Memory Fault)
None of the above
High Byte
Bit Position
Flag
Default Value
7
6
5
4
3
2
1
0
VOUT fault or warning
0
0
0
0
0
0
0
0
IOUT fault or warning
X
X
POWER_GOOD# (is negated)
X
X
X
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SLDN-03D1Ax
STATUS_VOUT : Returns one byte of information relating to the status of the module’s output voltage related faults.
Bit Position
Flag
Default Value
7
6
5
4
3
2
1
0
VOUT OV Fault
0
0
0
0
0
0
0
0
X
X
VOUT UV Fault
X
X
X
X
STATUS_IOUT : Returns one byte of information relating to the status of the module’s output voltage related faults.
Bit Position
Flag
Default Value
7
6
5
4
3
2
1
0
IOUT OC Fault
0
0
0
0
0
0
0
0
X
IOUT OC Warning
X
X
X
X
X
STATUS_TEMPERATURE : Returns one byte of information relating to the status of the module’s temperature related faults.
Bit Position
Flag
Default Value
7
6
5
4
3
2
1
0
OT Fault
0
0
0
0
0
0
0
0
OT Warning
X
X
X
X
X
X
STATUS_CML : Returns one byte of information relating to the status of the module’s communication related faults.
Bit Position
Flag
Default Value
7
6
5
4
3
2
1
0
Invalid/Unsupported Command
0
0
0
0
0
0
0
0
Invalid/Unsupported Command
Packet Error Check Failed
X
X
X
Other Communication Fault
X
MFR_VIN_MIN : Returns minimum input voltage as two data bytes of information in Linear format (upper five bits are exponent – fixed
at -2, and lower 11 bits are mantissa in two’s complement format – fixed at 12)
MFR_VOUT_MIN : Returns minimum output voltage as two data bytes of information in Linear format (upper five bits are exponent –
fixed at -10, and lower 11 bits are mantissa in two’s complement format – fixed at 614)
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SLDN-03D1Ax
MFR_SPECIFIC_00 : Returns information related to the type of module and revision number. Bits [7:2] in the Low Byte indicate the
module type (001000 corresponds to the SLDN-03D1Ax series of module), while bits [7:3] indicate the revision number of the module.
Low Byte
Bit Position
Flag
Module Name
Reserved
Default Value
001000
10
7:2
1:0
High Byte
Bit Position
Flag
Default Value
None
7:3
2:0
Module Revision Number
Reserved
000
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SLDN-03D1Ax
Please refer to the Power Management Bus 1.1 specification for more details of these commands in table below
Non-Volatile
Memory
Storage
Hex
Code
Command
Brief Description
Turn Module on or off. Also used to margin the output voltage
Format
Bit Position
Access
Function
Default Value
Unsigned Binary
7
r/w
On
0
6
r
X
0
5
r/w
4
3
2
r/w
1
r
0
r
01
OPERATION
r/w
r/w
Margin
X
X
X
X
0
0
0
0
Configures the ON/OFF functionality as a combination of analog ON/OFF pin and
Power Management Bus commands
Format
Bit Position
Access
Function
Default Value
Unsigned Binary
7
r
X
0
6
r
X
0
5
r
X
0
4
r/w
pu
1
3
r/w
cmd
0
2
1
0
r
cpa
1
02
03
ON_OFF_CONFIG
CLEAR_FAULTS
YES
r/w
cpr
1
r/w
pol
1
Clear any fault bits that may have been set, also releases the SMBALERT# signal if the
device has been asserting it.
Used to control writing to the module via Power Management Bus. Copies the current
register setting in the module whose command code matches the value in the data
byte into non-volatile memory (EEPROM) on the module
Format
Bit Position
Access
Function
Default Value
Unsigned Binary
7
r/w
bit7
0
6
r/w
bit6
0
5
r/w
bit5
0
4
x
3
x
2
x
1
x
0
x
X
X
X
X
X
X
X
X
X
X
10
WRITE_PROTECT
YES
Bit5: 0 – Enables all writes as permitted in bit6 or bit7
1 – Disables all writes except the WRITE_PROTECT, OPERATION
and ON_OFF_CONFIG (bit 6 and bit7 must be 0)
Bit 6: 0 – Enables all writes as permitted in bit5 or bit7
1 – Disables all writes except for the WRITE_PROTECT and
OPERATION commands (bit5 and bit7 must be 0)
Bit7: 0 – Enables all writes as permitted in bit5 or bit6
1 – Disables all writes except for the WRITE_PROTECT command
(bit5 and bit6 must be 0)
Copies all current register settings in the module into non-volatile memory (EEPROM)
on the module. Takes about 50ms for the command to execute.
Restores all current register settings in the module from values in the module non-
volatile memory (EEPROM)
11
12
STORE_DEFAULT_ALL
RESTORE_DEFAULT_ALL
Copies the current register setting in the module whose command code matches the
value in the data byte into non-volatile memory (EEPROM) on the module
Bit Position
Access
Function
7
w
6
w
5
w
4
w
3
w
2
w
1
w
0
w
13
14
STORE_DEFAULT_CODE
Command code
Restores the current register setting in the module whose command code matches
the value in the data byte from the value in the module non-volatile memory
(EEPROM)
RESTORE_DEFAULT_CODE
Bit Position
Access
7
w
6
w
5
w
4
w
3
w
2
w
1
w
0
w
Function
Command code
The module has MODE set to Linear and Exponent set to -10. These values cannot be
changed
Bit Position
Access
Function
7
r
6
5
r
4
r
3
r
2
1
r
0
r
20
VOUT_MODE
r
Mode
0
r
Exponent
1
Default Value
0
0
1
0
1
0
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SLDN-03D1Ax
Non-Volatile
Memory
Storage
Hex
Command
Code
Brief Description
Apply a fixed offset voltage to the output voltage command value
Format
Bit Position
Access
Linear, two’s complement binary
7
6
r
5
4
3
2
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
High Byte
22
25
26
29
35
VOUT_TRIM
VOUT_MARGIN_HIGH
VOUT_MARGIN_LOW
VOUT_SCALE_LOOP
VIN_ON
YES
YES
YES
YES
YES
Default Value
Bit Position
Access
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Low Byte
Default Value
0
0
0
0
0
0
0
0
Sets the target voltage for margining the output high
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
5
4
3
2
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
High Byte
Default Value
Bit Position
Access
0
7
0
6
0
5
0
4
0
3
1
2
0
1
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Low Byte
Default Value
0
1
0
0
0
1
1
1
Sets the target voltage for margining the output low
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
5
4
3
2
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
High Byte
Default Value
Bit Position
Access
0
7
0
6
0
5
0
4
0
3
1
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Low Byte
Default Value
0
1
0
1
0
0
0
1
Sets the scaling of the output voltage – equal to the feedback resistor divider ratio
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r/w
r/w
Function
Exponent
Mantissa
Default Value
Bit Position
Access
1
7
0
6
1
5
1
4
1
3
0
2
0
1
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
Default Value
0
0
0
0
0
0
0
0
Sets the value of input voltage at which the module turns on
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r
r
Function
Exponent
Mantissa
Default Value
Bit Position
Access
1
7
r
1
6
1
5
1
4
0
3
0
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
Default Value
0
0
0
0
1
0
1
1
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SLDN-03D1Ax
Non-Volatile
Memory
Storage
Hex
Command
Code
Brief Description
Sets the value of input voltage at which the module turns off
Linear, two’s complement binary
Format
Bit Position
Access
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r
r
Function
Exponent
Mantissa
36
VIN_OFF
YES
1
7
r
1
6
1
5
1
4
0
3
0
2
0
1
0
0
Default Value
Bit Position
Access
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
Default Value
0
0
0
0
1
0
1
0
Returns the value of the gain correction term used to correct the measured output
current
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r
r/w
Exponent
Mantissa
Function
38
IOUT_CAL_GAIN
YES
1
7
0
6
0
5
0
4
1
3
0
2
0
1
V
0
Default Value
Bit Position
Access
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
V: Variable based on factory calibration
Default Value
Returns the value of the offset correction term used to correct the measured output
current
Linear, two’s complement binary
Format
Bit Position
Access
7
r
6
r
5
4
r
3
r
2
1
0
r
r
r/w
r
Function
Exponent
Mantissa
39
IOUT_CAL_OFFSET
YES
Default Value
Bit Position
Access
1
7
r
1
6
r
1
5
0
4
0
3
V
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
Mantissa
V: Variable based on factory calibration
Function
0
0
Default Value
Sets the voltage level for an output overvoltage fault. Exponent is fixed at -10.
Suggested value shown for 1.2Vo. Should be changed for different output voltage.
Values can be 108%, 110%, 112% or 115% of output voltage
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
5
4
3
2
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
40
VOUT_OV_FAULT_LIMIT
YES
High Byte
Function
Default Value
Bit Position
Access
0
7
0
6
0
5
0
4
0
3
1
2
0
1
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Low Byte
Function
0
1
1
0
0
0
0
0
Default Value
Instructs the module on what action to take in response to a output overvoltage fault
Unsigned Binary
Format
Bit Position
Access
7
6
5
4
3
2
r
1
r
0
r
41
VOUT_OV_FAULT_RESPONSE
YES
r/w
r/w
r/w
r/w
r/w
RSP
[1]
RSP
[0]
RS[2] RS[1] RS[0]
X
1
X
0
X
0
Function
1
1
1
1
1
Default Value
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SLDN-03D1Ax
Non-Volatile
Memory
Storage
Hex
Command
Code
Brief Description
Sets the voltage level for an output undervoltage fault. Exponent is fixed at -10.
Suggested value shown for 1.2Vo. Should be changed for different output voltage.
Values can be 92%, 90%, 88% or 85% of output voltage
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
5
4
3
2
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
44
VOUT_UV_FAULT_LIMIT
YES
Function
High Byte
Default Value
Bit Position
Access
0
7
0
6
0
5
0
4
0
3
1
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Low Byte
Default Value
0
0
1
1
1
0
0
1
Instructs the module on what action to take in response to a output undervoltage
fault
Format
Bit Position
Access
Unsigned Binary
7
6
5
4
3
2
r
1
r
0
r
45
VOUT_UV_FAULT_RESPONSE
YES
r/w
r/w
r/w
r/w
r/w
RSP
[1]
RSP
[0]
Function
RS[2] RS[1] RS[0]
X
1
X
0
X
0
Default Value
0
0
0
0
0
Sets the output overcurrent fault level in A (cannot be changed)
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r
r
Function
Exponent
Mantissa
46
IOUT_OC_FAULT_LIMIT
YES
Default Value
Bit Position
Access
1
7
r
1
6
r
1
5
r
1
4
r
1
3
r
0
2
r
0
1
r
0
0
R
Function
Mantissa
Default Value
0
0
0
0
1
1
0
0
Sets the output overcurrent warning level in A
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r
r
Function
Exponent
Mantissa
4A
IOUT_OC_WARN_LIMIT
YES
Default Value
Bit Position
Access
1
7
r
1
6
r
1
5
1
4
1
3
0
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
Default Value
0
0
0
0
1
0
1
0
Sets the output voltage level at which the PGOOD pin is asserted high
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
5
4
3
2
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
High Byte
5E
POWER_GOOD_ON
YES
Default Value
Bit Position
Access
0
7
0
6
0
5
0
4
0
3
1
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Low Byte
Default Value
0
1
1
0
1
0
1
0
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33
SLDN-03D1Ax
Non-Volatile
Memory
Storage
Hex
Command
Code
Brief Description
Sets the output voltage level at which the PGOOD pin is de-asserted low
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
5
4
3
2
1
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
High Byte
5F
POWER_GOOD_OFF
YES
Default Value
Bit Position
Access
0
7
0
6
0
5
0
4
0
3
1
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Low Byte
Default Value
0
1
0
1
0
0
1
0
Sets the rise time of the output voltage during startup
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r
r/w
Function
Exponent
Mantissa
61
TON_RISE
YES
Default Value
Bit Position
Access
1
7
1
6
1
5
0
4
0
3
0
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
Default Value
0
0
1
0
1
0
1
0
Returns one byte of information with a summary of the most critical module faults
Format
Bit Position
Access
Unsigned Binary
7
r
6
r
5
r
4
r
3
r
2
r
1
r
0
78
STATUS_BYTE
r
OTHE
R
VOUT_ IOUT_ VIN_U
Flag
X
OFF
TEMP CML
OV
0
OC
0
V
0
Default Value
0
0
0
0
0
Returns two bytes of information with a summary of the module’s fault/warning
conditions
Format
Bit Position
Access
Unsigned Binary
7
r
6
5
r
4
r
3
2
r
1
r
0
r
r
r
IOUT_
OC
0
PGOO
Flag
VOUT
X
X
X
X
X
D
0
3
r
79
STATUS_WORD
Default Value
Bit Position
Access
0
7
r
0
5
r
0
4
r
0
2
r
0
1
r
0
6
0
r
r
OTHE
R
VOUT_ IOUT_ VIN_U
Flag
X
0
OFF
0
TEMP CML
OV
0
OC
0
V
0
Default Value
0
0
0
Returns one byte of information with the status of the module’s output voltage related
faults
Format
Bit Position
Access
Unsigned Binary
7
6
r
5
4
3
r
2
r
1
r
0
r
7A
7B
STATUS_VOUT
STATUS_IOUT
r
VOUT_OV
0
r
r
VOUT_UV
0
Flag
Default Value
X
0
X
0
X
0
X
0
X
0
X
0
Returns one byte of information with the status of the module’s output current related
faults
Format
Bit Position
Access
Unsigned Binary
7
6
r
5
4
r
3
r
2
r
1
r
0
r
r
IOUT_OC
0
r
Flag
X
0
IOUT_OC_WARN
0
X
0
X
0
X
0
X
0
X
0
Default Value
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34
SLDN-03D1Ax
Non-Volatile
Memory
Storage
Hex
Command
Code
Brief Description
Returns one byte of information with the status of the module’s temperature related
faults
Format
Bit Position
Access
Unsigned Binary
7
6
5
r
4
r
3
r
2
r
1
r
0
R
X
0
7D
STATUS_TEMPERATURE
r
r
Flag
OT_FAULT
0
OT_WARN
0
X
0
X
0
X
0
X
0
X
0
Default Value
Returns one byte of information with the status of the module’s communication
related faults
Format
Bit Position
Access
Unsigned Binary
7
r
6
r
5
r
4
r
3
r
2
r
1
r
0
r
7E
STATUS_CML
Other
Comm
Fault
Invalid
Command
Invalid PEC
Flag
X
X
X
0
X
0
Data
Fail
Default Value
0
0
0
0
0
0
Returns the value of the input voltage applied to the module
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r
r
Function
Exponent
Mantissa
88
READ_VIN
READ_VOUT
READ_IOUT
Default Value
Bit Position
Access
1
7
r
1
6
r
0
5
r
1
4
r
1
3
r
0
2
r
0
1
r
0
0
r
Function
Mantissa
Default Value
0
0
0
0
0
0
0
0
Returns the value of the output voltage of the module
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
r
4
r
3
r
2
r
1
r
0
r
Function
Mantissa
8B
Default Value
Bit Position
Access
0
7
r
0
6
r
0
5
r
0
4
r
0
3
r
0
2
r
0
1
r
0
0
r
Function
Mantissa
Default Value
0
0
0
0
0
0
0
0
Returns the value of the output current of the module
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r
r
Function
Exponent
Mantissa
8C
Default Value
Bit Position
Access
1
7
r
1
6
r
1
5
r
0
4
r
0
3
r
0
2
r
0
1
r
0
0
r
Function
Mantissa
Default Value
0
0
0
0
0
0
0
0
Returns one byte indicating the module is compliant to Power Management Bus Spec.
1.1 (read only)
POWER MANAGEMENT
BUS_REVISION
Format
Bit Position
Access
Unsigned Binary
98
YES
7
r
6
r
5
r
4
r
3
r
2
r
1
r
0
r
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35
SLDN-03D1Ax
Default Value
0
0
0
1
0
0
0
1
Non-Volatile
Memory
Storage
Hex
Command
Code
Brief Description
Returns the minimum input voltage the module is specified to operate at (read only)
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
r
1
0
r
r
r
Function
Exponent
Mantissa
A0
A4
D0
MFR_VIN_MIN
MFR_VOUT_MIN
MFR_SPECIFIC_00
YES
YES
YES
Default Value
Bit Position
Access
1
7
r
1
6
r
1
5
r
1
4
r
0
3
r
0
2
r
0
1
r
0
0
r
Function
Mantissa
Default Value
0
0
0
0
1
1
0
0
Returns the minimum output voltage possible from the module (read only)
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
r
4
r
3
r
2
r
1
r
0
r
Function
Mantissa
Default Value
Bit Position
Access
0
7
r
0
6
r
0
5
r
0
4
r
0
3
r
0
2
r
1
1
r
0
0
r
Function
Mantissa
Default Value
0
1
1
0
0
1
1
0
Returns module name information (read only)
Format
Bit Position
Access
Unsigned Binary
7
r
6
r
5
r
4
r
3
r
2
r
1
r
0
r
Function
Reserved
Default Value
Bit Position
Access
0
7
r
0
6
r
0
5
r
0
4
r
0
3
r
0
2
r
0
1
r
0
0
r
Function
Module Name
Reserved
Default Value
0
0
1
0
0
0
1
0
Applies an offset to the READ_VOUT command results to calibrate out offset errors in
module measurements of the output voltage (between -125mV and +124mV)
Format
Bit Position
Access
Linear, two’s complement binary
7
6
r
5
r
4
r
3
r
2
r
1
r
0
r
r/w
Function
Mantissa
D4
VOUT_CAL_OFFSET
YES
Default Value
Bit Position
Access
V
7
r
0
6
0
5
0
4
0
3
0
2
0
1
0
0
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
Default Value
V
V
V
V
V
V
V
V
Applies a gain correction to the READ_VOUT command results to calibrate out gain
errors in module measurements of the output voltage (between -0.125 and 0.121)
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
1
0
r
r
r/w
r
Function
Exponent
Mantissa
D5
VOUT_CAL_GAIN
YES
Default Value
Bit Position
Access
1
7
r
1
6
r
0
5
r
0
4
0
3
0
2
0
1
V
0
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
Default Value
V
V
V
V
V
V
V
V
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36
SLDN-03D1Ax
Non-Volatile
Memory
Storage
Hex
Command
Code
Brief Description
Applies an offset correction to the READ_VIN command results to calibrate out offset errors in
module measurements of the input voltage (between -2V and +1.968V)
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
1
0
r
r
r/w
r
Function
Exponent
Mantissa
D6
VIN_CAL_OFFSET
YES
Default Value
Bit Position
Access
1
7
r
1
6
r
0
5
1
4
V
3
0
2
0
1
V
0
r/w
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
Default Value
0
0
V
V
V
V
V
V
Applies a gain correction to the READ_VIN command results to calibrate out gain errors in module
measurements of the input voltage (between -0.125 and 0.121)
Format
Bit Position
Access
Linear, two’s complement binary
7
r
6
r
5
4
r
3
r
2
1
0
r
r
r/w
r
Function
Exponent
Mantissa
D7
VIN_CAL_GAIN
YES
Default Value
Bit Position
Access
1
7
r
1
6
r
0
5
r
0
4
V
3
0
2
0
1
V
0
r/w
r/w
r/w
r/w
r/w
Function
Mantissa
Default Value
0
0
0
V
V
V
V
V
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37
SLDN-03D1Ax
The SLDN-03D1Ax power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided
to help ensure reliable operation.
Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in
the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical
measurements taken in a wind tunnel. The test set-up is shown in Figure 49, the preferred airflow direction in Figure 50.
25.4_
Wind Tunnel
PWBs
(1.0)
Power Module
76.2_
(3.0)
x
Probe Location
for measuring
airflow and
12.7_
(0.50)
ambient
temperature
Air
flow
Figure 49. Thermal Test Setup.
The thermal reference points, Tref used in the specifications are also shown in Figure 50. For reliable operation the temperatures at
these points should not exceed 120°C. The output power of the module should not exceed the rated power of the module
(Vo,set x Io,max).
Please refer to the Application Note “Thermal Characterization Process For Open-Frame Board-Mounted Power Modules” for a
detailed discussion of thermal aspects including maximum device temperatures.
Figure 50. Preferred airflow direction and location of hot-spot of the module(Tref).
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38
SLDN-03D1Ax
Requirements:
Vin:
12V
Vout:
Iout:
Vout:
Vin, ripple
1.8V
2.25A max., worst case load transient is from 1.5A to 2.25A
1.5% of Vout (27mV) for worst case load transient
1.5% of Vin (180mV, p-p)
Vin+
Vout+
VIN
VOUT
VS+
PGOOD
RTUNE
CTUNE
MODULE
SEQ
CLK
TRIM
ADDR0
ADDR1
CI2
CI3
CI1
CO3
CO1
CO2
DATA
SMBALRT#
RTrim
ON/OFF
SYNC
RADDR1 RADDR0
SIG_GND
GN
-
GND
CI1
CI2
CI3
Decoupling cap - 1x0.047 F/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01)
1x22 F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20)
470 F/16V bulk electrolytic
CO1
CO2
CO3
Decoupling cap - 1x0.047 F/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01)
-
1x330uF
CTune
RTune
RTrim
2200pF ceramic capacitor (can be 1206, 0805 or 0603 size)
220 ohms SMT resistor (can be 1206, 0805 or 0603 size)
10k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
Note: The DATA, CLK and SMBALRT pins do not have any pull-up resistors inside the module. Typically, the SMBus master controller
will have the pull-up resistors as well as provide the driving source for these signals.
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39
SLDN-03D1Ax
Dimensions are in millimeters and (inches).
Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated]
x.xx mm 0.25 mm (x.xxx in 0.010 in.)
PIN
1
FUNCTION
ON/OFF
VIN
PIN
10
11
12
13
14
15
16
17
FUNCTION
PGOOD
SYNC1
2
3
GND
VS-
4
VOUT
SIG. GND
SMBALERT
DATA
5
VS+ (SENSE)
TRIM
6
7
GND
ADDR0
ADDR1
8
CLK
9
SEQ
1 If unused, connect to Ground.
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40
SLDN-03D1Ax
Dimensions are in millimeters and (inches).
Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated]
x.xx mm 0.25 mm (x.xxx in 0.010 in.)
7
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41
SLDN-03D1Ax
The SLDN-03D1Ax modules are supplied in tape & reel as standard.
All Dimensions are in millimeters and (in inches).
Reel Dimensions:
Outside Dimensions:
Inside Dimensions:
Tape Width:
330.2 mm (13.00)
177.8 mm (7.00”)
24.00 mm (0.945”)
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42
SLDN-03D1Ax
The SLDN-03D1Ax modules use an open frame construction and are designed for a fully automated assembly process. The modules
are fitted with a label designed to provide a large surface area for pick and place operations. The label meets all the requirements for
surface mount processing, as well as safety standards, and is able to withstand reflow temperatures of up to 300oC. The label also
carries product information such as product code, serial number and the location of manufacture.
The weight has been kept to a minimum by using open frame construction. Variables such as nozzle size, tip style, vacuum pressure
and placement speed should be considered to optimize this process. The minimum recommended inside nozzle diameter for reliable
operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 7 mm.
This SLDN-03D1Ax module is not recommended for assembly on the bottom side of a customer board. If such an assembly is
attempted, components may fall off the module during the second reflow process.
The SLDN-03D1Ax modules are lead-free (Pb-free) and RoHS compliant and are both forward and backward compatible in a Pb-free
and a SnPb soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules
and can adversely affect long-term reliability.
Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface
Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-
air-convection reflow profile based on the volume and thickness of the package (table 5-2). The suggested Pb-free solder paste is
Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Fig. 51. Soldering outside of the
recommended profile requires testing to verify results and performance.
It is recommended that the pad layout include a test pad where the output pin is in the ground plane. The thermocouple should be
attached to this test pad since this will be the coolest solder joints. The temperature of this point should be:
Maximum peak temperature is 260 C.
Minimum temperature is 235 C.
Dwell time above 217 C: 60 seconds minimum
Dwell time above 235 C: 5 to 15 second
The SLDN-03D1Ax modules have a MSL rating of 2A.
Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate
cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For
guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning
Application Note (AN04-001)
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43
SLDN-03D1Ax
The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-
STD-033 Rev. B (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags
(MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use.
Once the original package is broken, the floor life of the product at conditions of 30°C and 60% relative humidity varies according
to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal
date, when stored at the following conditions: < 40° C, < 90% relative humidity.
Figure 51. Recommended linear reflow profile using Sn/Ag/Cu solder.
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44
SLDN-03D1Ax
DATE
REVISION CHANGES DETAIL
APPROVAL
HL LU
2012-03-20
2012-05-03
A
B
First release
Adding the patent info.
HL LU
Update part selection, output specifications, general specifications, safety considerations,
analog voltage margining, output voltage adjustment using the Power Management Bus,
Power Management Bus adjustable overcurrent warning, Power Management Bus
adjustable input undervoltage lockout, measuring output current using the Power
Management Bus, summary of supported Power Management Bus commands, thermal
considerations, example application circuit, packaging details, MSL rating.
Updated to the latest Bel template.
2015-7-2
C
D
XF Jiang
2019-Jan-20
Disclaimer: Power Management Bus is a registered trademark of SMIF, Inc. added
NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
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