NQ04018HMA15PVN [SYNQOR]
16Amp, wide ouput range, Non-Isolated DC/DC Converter; 16Amp ，宽范围的输出中，非隔离式DC / DC转换器
| 型号： | NQ04018HMA15PVN |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | 16Amp, wide ouput range, Non-Isolated DC/DC Converter |
| 文件： | 总20页 (文件大小：1627K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
*
Technical Specification
Non-Isolated
3.0 - 5.5V
16A
SIP Converter
in
16Amp, wide ouput range, Non-Isolated DC/DC Converter
™
The NiQor SIP DC/DC converter is a non-isolated
buck regulator, which employs a fixed switching fre-
quency and synchronous rectification to achieve
extremely high conversion efficiency. The NiQor
Non-Isolated
family of converters are used predominately in DPA
systems using a front end DC/DC high power brick
(48Vin to low voltage bus). The non-isolated NiQor
converters are then used at the point of load to cre-
ate the low voltage outputs required by the design.
The wide trim module can be programmed to a vari-
ety of output voltages through the use of a single
NiQor vertical mount SIP module
resistor.
Operational Features
Mechanical Features
• Ultra-high efficiency, up to 94% full load, 95% half
• Industry standard SIP pin-out configuration
• Delivers 16 amps of output current with minimal der-
•Industry standard size: 2.0” x 0.55” x 0.29 (50.8 x
ating - no heatsink required
14 x 7.3mm)
• Input voltage range: 3.0 - 5.5V
• Programmable output voltages from 0.85 - 3.6V
• Total weight: 0.30 oz. (9.4 g), lower mass greatly
reduces vibration and shock problems
• Open frame construction maximizes air flow cooling
• Available in both vertical and horizontal mounting
• Fixed frequency switching provides predictable EMI
performance
• Fast transient response time
• On-board input and output filter capacitor
Control Features
• On/Off control
• No minimum load requirement means no preload
resistors required
• Output voltage trim (industry standard) permits
custom voltages and voltage margining
• Remote sense (standard option)
Protection Features
• Fixed output voltage 15A modules available
• Input under-voltage lockout disables converter at
low input voltage conditions
(0.9V - 3.3V)
• Temperature compensated over-current shutdown
protects converter from excessive load current or
short circuits
Safety Features
• UL 1950 recognized (US & Canada)
• TUV certified to EN60950
• Output over-voltage protection protects load from
damaging voltages (>4.4V)
• Meets 72/23/EEC and 93/68/EEC directives
which facilitates CE Marking in user’s end product
• Thermal shutdown
• Board and plastic components meet UL94V-0 flam-
mability requirements
* Final datasheet pending ECO review and signature.
Product # NQ04T33VMA16
Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 1
Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
MECHANICAL
DIAGRAM
Vertical Mount
Side View
Front View
0.288
(7.32)
2.00
(50.8)
0.315 Max
0.185
(4.7)
(8.0 Max)
0.197 Max
(5.0 Max)
0.550
(13.97)
Ref.
0.050
(1.27)
0.160
(4.06)
1
2
3
4
5
A
6
7
8
10 11
0.050
(1.27)
0.040 PCB Ref.
(1.02)
0.120
(3.05)
0.025 + 0.003
(0.64 + 0.076)
SQ. Typ.
0.000 0.100 0.200 0.300 0.400
1.300 1.400 1.500 1.600
(33.02) (35.56) (38.10) (40.64)
1.800 1.900
(0.00)
(2.54)
(5.08)
(7.62)
(10.16)
(45.72) (48.26)
NOTES
PIN DESIGNATIONS
1) All pins are 0.025” (0.64mm) +/- 0.003 (0.076mm) square.
2) All Pins: Material - Copper Alloy
Pin No. Name
Function
1
2
3
4
5
A
6
Vout(+)
Vout(+)
SENSE(+)
Vout(+)
Common
I share
Positive output voltage
Positive output voltage
Positive remote sense
Positive output voltage
Finish - Tin over Nickel plate
3) Vertical, horizontal, vertical with reverse pins and surface
mount options (future) available.
4) Undimensioned components are shown for visual
reference only.
6) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
7) Weight: 0.30 oz. (9.4 g) typical
Current share*
Common
Vin(+)
7
Positive input voltage
8) Workmanship: Meets or exceeds IPC-A-610C Class II
8
10
11
Vin(+)
TRIM1
ON/OFF2
Positive input voltage
Output voltage trim (trim-up only)
LOGIC input to turn the converter
on and off.
Pin Connection Notes:
1. Pin 10 - for fixed resistors, connect between Trim and
Common (Ground).
2. Pin 11 - see section on Remote ON/OFF pin for descrip-
tion of enable logic options.
Pins in Italics Shaded text are Optional
* Contact factory for availability of current share modules.
Product # NQ04T33VMA16
Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 2
Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
MECHANICAL
DIAGRAM
Horizontal Mount
Front View
Side View
0.288
(7.32)
2.00
(50.8)
0.315 Max
0.185
(4.7)
(8.0 Max)
0.197 Max
(5.0 Max)
0.025 + 0.003
(0.64 + 0.076)
SQ. Typ.
0.550
(13.97)
Ref.
0.050
(1.27)
1
2
3
4
5
A
6
7
8
10 11
0.128 Min
0.050
(1.27)
(3.25 Min)
0.040 PCB Ref.
(1.02)
0.330
(8.38)
See note on Thermal
Considerations in
Applications section.
0.000 0.100 0.200 0.300 0.400
1.300 1.400 1.500 1.600
(33.02) (35.56) (38.10) (40.64)
1.800 1.900
(45.72) (48.26)
(0.00)
(2.54)
(5.08)
(7.62)
(10.16)
Vertical Mount
Reversed Pins
Front View
Side View
2.00
0.288
(7.32)
(50.8)
0.315 Max
0.185
(4.7)
(8.0 Max)
0.197 Max
(5.0 Max)
0.550
(13.97)
Ref.
0.050
1
2
3
4
5
A
6
7
8
10 11
(1.27)
0.160
(4.06)
0.050
(1.27)
0.040 PCB Ref.
(1.02)
0.120
(3.05)
0.025 + 0.003
(0.64 + 0.076)
SQ. Typ.
0.000 0.100 0.200 0.300 0.400
1.300 1.400 1.500 1.600
(33.02) (35.56) (38.10) (40.64)
1.800 1.900
0.058 +.008
(1.47 +.20)
(0.00)
(2.54)
(5.08)
(7.62)
(10.16)
(45.72) (48.26)
Product # NQ04T33VMA16
Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 3
Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
ELECTRICAL CHARACTERISTICS - NQ04T33VMA16 Series
Vin=3.3Vdc and 5.0Vdc except 3.3Vout units where Vin=5.0V; TA=25°C, airflow rate=300 LFM unless otherwise noted; full operating tem-
perature range is -40°C to +105°C ambient temp with appropriate power derating. Specifications subject to change without notice.
Parameter
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Setpoint
Min.
Typ.
Max.
Units Notes & Conditions
Non-Operating
Operating
Operating Transient Protection
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin (N, O options)
Voltage at ON/OFF input pin (P option)
INPUT CHARACTERISTICS
Operating Input Voltage Range1
All
All
All
All
All
All
All
6.0
5.5
7.0
105
125
V
V
V
°C
°C
V
continuous
continuous
100ms transient
3.0
-40
-55
-3
6.5
Vin + 0.3
Negative and Negative/Open logic
Positive/Open logic
-0.5
V
0.9-2.5V
3.3V
3.0
4.5
3.3-5.0
5.0
5.5
5.5
V
V
Referenced notes on pg. 6
Input Under-Voltage Lockout1
Turn-On Voltage Threshold
0.9-2.5V
3.3V
0.9-2.5V
3.3V
0.9V
1.0V
1.2V
1.5V
1.8V
2.5V
1.9
4.1
1.9
3.5
2.4
4.3
2.3
3.7
2.85
4.5
2.85
V
V
V
V
A
A
A
A
A
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Turn-Off Voltage Threshold
4.0
Maximum Input Current2 (3.0Vin\4.5Vin)
6.8\4.6
7.4\5.0
8.7\5.8
10.4\7.0
12.2\8.2
16.3\11.0
14.2
100% Load, 3.0Vin\4.5Vin, nominal Vout
(+10%), full temp range, for all voltages.
A
A
3.3V
3.3Vout at 4.5Vin only
No-Load Input Current (3.3Vin)
No-Load Input Current (5.0Vin)
0.9-2.5V
0.9-2.5V
3.3V
0.9-2.5V
3.3V
80
100
80
15
10
105
130
105
25
20
0.1
mA
mA
mA
mA
mA
Disabled Input Current
2
Inrush Current Transient Rating
All
A s
Response to Input Transient (3.3Vin)
0.9V
2.5V
0.9V
3.3V
0.9-1.8V
2.5V
0.9,1.0V
1.2,3.3V
1.5-2.5V
0.9-1.8V
2.5V
0.9,1.0V
1.2,1.5V
1.8,2.5V
3.3V
130
250
75
200
215
135
175
200
235
3.2
mV/V 50mV/
mV/V
mV/V
µs input transient (all)
Response to Input Transient (5.0 Vin)
Input Reflected-Ripple Current (3.3Vin)
Input Reflected-Ripple Current (5.0Vin)
mV/V
mA
mA
mA
mA
mA
A
pk-pk through 1µH inductor;
Figs. 26, 29-30
pk-pk through 1µH inductor;
Figs. 26, 29-30
Input Terminal Ripple Current (3.3Vin)
Input Terminal Ripple Current (5.0Vin)
RMS; 200µF/50m
Ω
input cap.;
2.2
2.7
3.2
3.7
A
Figs. 26-28
A
A
RMS 200µF/50m
Figs. 26-28
Ω input cap.;
A
A
3.2
Recommended Input Fuse
Input Filter Capacitor Value
Input Ripple Voltage (3.3Vin)
All
All
20
A
µF
fast blow external fuse recommended
internal ceramic
40
0.9,2.5V
1.0-1.8V
0.9-1.2V
1.5,1.8V
2.5,3.3V
All
135
150
120
140
150
200
mV
mV
mV
mV
mV
µF
RMS, full load, 200µF/50m
Ω
input cap.
see Fig. 26
Input Ripple Voltage (5.0Vin)
RMS, full load, 200µF/50m
see Fig. 26
Ω
input cap.
2
Recommended External Input Capacitance
net 50mΩ
Product # NQ04T33VMA16
Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 4
Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
ELECTRICAL CHARACTERISTICS (continued) - NQ04T33VMA16 Series
Parameter
Setpoint
Min.
Typ.
Max.
Units Notes & Conditions
OUTPUT CHARACTERISTICS
6
Output Voltage Set Point (50% load)
0.9V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
0.884
0.984
1.181
1.477
1.773
2.461
3.242
0.900
1.000
1.200
1.500
1.800
2.500
3.300
0.917
1.019
1.221
1.526
1.831
2.543
3.358
V
V
V
V
V
V
V
see trim equation
Vin range 4.5V - 5.5V
Output Voltage Regulation
Over Line
+
+
+
+
+
0.2
All
0.9V
3.3V
All
0.9V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
All
0.1
0.5
0.2
4.5
%
%
%
%
V
V
V
V
V
Over Load
with sense pin
with sense pin
except +5.0% at less than 0.9V
with sense pin, over sample, line, load,
temperature & life (all)
Over Temperature
Total Output Voltage Range
0.859
0.957
1.150
1.438
1.727
2.397
3.152
0.940
1.044
1.250
1.563
1.875
2.605
3.444
35\12
60\20
16
V
V
Output Voltage Ripple & Noise (3.3Vin)
Output Voltage Ripple & Noise (5.0Vin)
Operating Output Current Range
15\6
25\9
pk-pk\RMS; full load, 20MHz bandwidth;
Figs 26, 31-32
All
All
All
All
mV
A
A
0
17
Output DC Over-Current Shutdown3
25
40
4,000
Maximum Output Capacitance2,4
µF
Derate startup load current per Fig. 25
120 Hz; Figure 39
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection (3.3Vin)
0.9V
2.5V
0.9V
3.3V
51
37
56
39
dB
dB
dB
dB
Input Voltage Ripple Rejection (5.0Vin)
120 Hz; Figure 40
Output Voltage during Load Current Transient
For a Step Change Iout=0.1A/µs (3.3Vin\5Vin)
For a Step Change Iout=3A/µs (3.3Vin\5Vin)
Settling Time (3.3Vin\5Vin)
Turn-On Transient
All
All
All
90\70
70\60
140\40
mV
mV
µs
50%-75%-50% Iout max, 10µF, Fig 15,17
50%-75%-50% Iout max, 470µF, Fig 16,18
to within 1.5% Vout nom., Fig 15-18
Load current & capacitance per Fig. 25
Enable to Vout=100% nom., Figs 19-22
Enable to 10%, Fig. 23
Turn-On Time
Start-Up Delay Time
All
5.5
2.9
1.5
1.7
2.6
6.8
4.0
2.5
2.5
3.9
8.5
5.9
4.3
3.9
5.7
0
ms
ms
ms
ms
ms
%
0.9V
3.3V
0.9V
3.3V
All
Start-Up Rise Time
10% to 90%, Fig. 24
Resistive load, up to 4,000 µF
Figures 1-4
Output Voltage Overshoot
EFFICIENCY
100% Load (3.3Vin\5Vin)
0.9V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
84.5/83
85.5/84.5
87.5/86.5
89.5/88.5
91/90
%
%
%
%
%
%
%
93.5/92.5
94
Product # NQ04T33VMA16
Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 5
Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
ELECTRICAL CHARACTERISTICS (continued) - NQ04T33VMA16 Series
Parameter
EFFICIENCY (cont.)
50% Load (3.3Vin\5Vin)
ModuleP Min.
Typ.
Max.
Units Notes & Conditions
0.9V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
89/87
89.5/88
91/89.5
92.5/91
93.5/92
95.5/94
95
%
%
%
%
%
%
%
Figures 1-4
TEMP. LIMITS FOR POWER DERATING
Semiconductor Junction Temperature5
Board Temperature5
All
All
125
125
°C
°C
Package rated to 150°C; Figs 5-14
UL rated max operating temp 130°C
FEATURE CHARACTERISTICS
Switching Frequency
Negative Logic (N, O) ON/OFF Control
Off-State Voltage
All
265
300
330
kHz
may decrease by up to 30 kHz at -40°C
Figure A, page 16
All
All
All
All
All
1.5
-3
6.5
0.6
V
V
V
On-State Voltage
Pull-Up Voltage (N logic only)
Pull-Up Resistance (N logic only)
Input Resistance (O logic only)
Positive Logic (P) ON/OFF Control
Logic Low Voltage Range
2/3 Vin
6.7
20
k
k
Ω
Ω
Open collector/drain input; Figure A
All
All
All
All
All
All
All
All
All
-0.2
2.2
300
1
Vin
V
V
µA
µA
V
%
V
°C
°C
Logic High Voltage Range (internal pullup)
Logic Low sink current
Vin/10K
550
10
3.6
+10
4.35
Logic High sink current (leakage)
Output Voltage Trim Range1,6,8
Output Voltage Remote Sense Range1,7,8
Output Over-Voltage Protection8
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
0.85
3.75
Measured Vout+ to common pins; Table 1
Measured Vout+ to common pins
Over full temp range
4.05
120
5
Average PCB Temperature
6
o
All
All
All
10.1
6.6
10 Hrs. TR-NWT-000332; 15A load, 200LFM, 40 C T
a
a
6
o
10 Hrs. MIL-HDBK-217F; 15A load, 200LFM, 40 C T
6
Field Demonstrated MTBF
10 Hrs. See website for latest values
Note 1: Maintain a minimum of 0.4V headroom between input and output voltage to meet performance specifications. Unit will perform as the model with the
output voltage that it is trimmed to.
Note 2: Tantalum or similar with additional ceramic as needed to reduce ripple current in external input capacitors. See Figure 26. When using more than
1000µF of output capacitance, input filter inductor should be reduced to <0.3µH or input capacitance should be increased to match output capacitance.
Consult factory for more demanding applications. Also refer to Application Considerations section of this datasheet.
Note 3: The over-current shutdown threshold for a short over-current pulse can be as high as 50A when trimming up a wide trim unit above 1.2V.
Note 4: When trimming a 0.9V unit to less than 0.88V with more than 1000µF of output capacitance, consult factory for trim circuit recommendations. This
also applies to trimming a 1.0V unit below 0.95V.
Note 5: Power derating curves are measured using an evaluation board consisting of 6 layers of 2 ounce copper.
Note 6: Wide trim option unit has a setpoint of 0.753V and a trim range of 0.85V-3.6V.
Note 7: In remote sense applications, when trimming down, the trim-down resistor should be connected to the sense pin for more accurate trimming results.
Note 8: User should allow sufficient transient response headroom between the module’s local output and the minimum OVP threshold.
Product # NQ04T33VMA16
Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 6
Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
STANDARDS COMPLIANCE
Parameter
P
Notes
STANDARDS COMPLIANCE
UL/cUL 60950
File # E194341
Certified by TUV
EN60950
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
GR-1089-CORE
Section 7 - electrical safety, Section 9 - bonding/grounding
Telcordia (Bellcore) GR-513
•
An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety
certificates on new releases or download from the SynQor website.
QUALIFICATION TESTING
Parameter
P
# Units Test Conditions
QUALIFICATION TESTING
Life Test
42
95% rated Vin and load, units at derating point, 1000 hours
Vibration
5
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x and y axis, 1 drop in z axis
-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load
85°C, 85% RH, 1000 hours, continuous Vin applied except 5min./day
MIL-STD-883, method 2003
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
5
10
5
5
5
Solderability
15 pins
•
Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply
robust, reliable product. Contact factory for official product family qualification document.
OPTIONS
PATENTS
SynQor provides various options for Packaging, Enable Logic, Pin SynQor is protected under various patents, including but not lim-
Length and Feature Set for this family of DC/DC converters. ited to U.S. Patent numbers: 5,999,417; 6,222,742 B1;
Please consult the last page of this specification sheet for infor- 6,594,159 B2; 6,545,890 B2.
mation on available options.
Product # NQ04T33VMA16
Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 7
Performance Curves
Non-Isolated
3.0 - 5.5V
16A
SIP Converter
in
100
95
90
85
80
75
70
65
100
95
90
85
80
75
70
65
2.5 Vo
1.8 Vo
1.5 Vo
1.2 Vo
1.0 Vo
0.9 Vo
3.3 Vo
2.5 Vo
1.8 Vo
1.5 Vo
1.2 Vo
1.0 Vo
0.9 Vo
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
Load Current (A)
Load Current (A)
Figure 1: Efficiency at 3.3Vin and nominal output voltage vs. load cur-
Figure 2: Efficiency at 5.0Vin and nominal output voltage vs. load cur-
rent for all modules at 25
°C.
rent for all modules at 25°C.
3.25
3.00
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.00
3.75
3.50
3.25
3.00
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.00
3.3 Vo
2.5 Vo
1.8 Vo
1.5 Vo
1.2 Vo
1.0 Vo
0.9 Vo
2.5 Vo
1.8 Vo
1.5 Vo
1.2 Vo
1.0 Vo
0.9 Vo
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
Load Current (A)
Load Current (A)
Figure 3: Power dissipation at 3.3Vin and nominal output voltage vs.
Figure 4: Power dissipation at 5.0Vin and nominal output voltage vs.
load current for all modules at 25
°C.
load current for all modules at 25°C.
16
14
12
10
8
16
14
12
10
8
6
6
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
4
4
2
2
50 LFM (0.25 m/s)
0
50 LFM (0.25 m/s)
0
0
25
40
55
70
85
0
25
40
55
70
85
Ambient Air Temperature (oC)
Ambient Air Temperature (oC)
Figure 5: Maximum output power derating curves vs. ambient air temp
for 0.9Vo to 1.8Vo units at 3.3Vin. Airflow rates of 50 - 400 LFM with
air flowing across the converter from pin 11 to pin 1 (vert mount).
Figure 6: Maximum output power derating curves vs. ambient air temp
for 0.9Vo to 1.8Vo units at 5.0Vin. Airflow rates of 50 - 400 LFM with
air flowing across the converter from pin 11 to pin 1 (vert mount).
Product # NQ04T33VMA16
Phone 1-888-567-9596
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7/6/04
Page 8
Performance Curves
Non-Isolated
3.0 - 5.5V
16A
SIP Converter
in
Semiconductor junction temperature is
within 1 C of surface temperature
Semiconductor junction temperature is
within 1 C of surface temperature
°
°
Figure 7: Thermal plot of 0.9Vo to 1.8Vo converters at 3.3Vin with 15
Figure 8: Thermal plot of 0.9Vo to 1.8Vo converters at 5.0Vin with 15
amp load current and 55
°
C air flowing at the rate of 200 LFM. Air is
amp load current and 55°C air flowing at the rate of 200 LFM. Air is
flowing across the converter from pin 11 to pin 1 (vertical mount).
flowing across the converter from pin 11 to pin 1 (vertical mount).
16
14
12
10
8
16
14
12
10
8
6
6
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
4
4
2
0
2
0
0
25
40
55
70
85
0
25
40
55
70
85
Ambient Air Temperature (oC)
Ambient Air Temperature (oC)
Figure 9: Maximum output power derating curves vs. ambient air tem-
perature for 2.5Vout unit at 3.3Vin. Airflow rates of 50 - 400 LFM with
air flowing across the converter from pin 11 to pin 1 (vert mount).
Figure 10: Maximum output power derating curves vs. ambient air tem-
perature for 2.5Vout unit at 5.0Vin. Airflow rates of 50 - 400 LFM with
air flowing across the converter from pin 11 to pin 1 (vert mount).
Semiconductor junction temperature is
Semiconductor junction temperature is
within 1
°C of surface temperature
within 1°C of surface temperature
Figure 11: Thermal plot of 2.5Vout converter at 3.3Vin with 15 amp
load current and 55 C air flowing at the rate of 200 LFM. Air is flow-
ing across the converter from pin 11 to pin 1 (vertical mount).
Figure 12: Thermal plot of 2.5Vout converter at 5.0Vin with 15 amp
load current and 55 C air flowing at the rate of 200 LFM. Air is flow-
ing across the converter from pin 11 to pin 1 (vertical mount).
°
°
Product # NQ04T33VMA16 Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B 7/6/04
Page 9
Performance Curves
Non-Isolated
3.0 - 5.5V
16A
SIP Converter
in
16
14
12
10
8
6
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
4
2
Semiconductor junction temperature is
within 1 C of surface temperature
0
°
0
25
40
55
70
85
Ambient Air Temperature (oC)
Figure 13: Maximum output power derating curves vs. ambient air tem-
perature for 3.3Vout unit at 5.0Vin. Airflow rates of 50 - 400 LFM with
air flowing across the converter from pin 11 to pin 1 (vert mount).
Figure 14: Thermal plot of 3.3Vout converter at 5.0Vin with 15 amp
load current and 55 C air flowing at the rate of 200 LFM. Air is flow-
ing across the converter from pin 11 to pin 1 (vertical mount).
°
2.5Vout
0.9Vout
2.5Vout
0.9Vout
Figure 15: Output voltage response at 3.3Vin to step-change in load cur-
Figure 16: Output voltage response at 3.3Vin to step-change in load cur-
rent (50-75-50% of Iout max; di/dt=0.1A/
µ
s). Load cap: 15
µ
F, 100m
Ω
ESR
rent (50-75-50% of Iout max; di/dt=3A/µs). Load cap: 470µF, 25mΩ ESR
tantalum and 10
µF ceramic. Top: Vout (100mV/div), Bottom: Iout (5A/div).
tantalum and 10
µ
F ceramic. Top: Vout (100mV/div), Bottom: Iout (5A/div).
3.3Vout
0.9Vout
3.3Vout
0.9Vout
Figure 17: Output voltage response at 5.0Vin to step-change in load cur-
rent (50-75-50% of Iout max; di/dt=0.1A/ s). Load cap: 15 F, 100m ESR
tantalum and 10 F ceramic. Top: Vout (100mV/div), Bottom: Iout (5A/div).
Figure 18: Output voltage response at 5.0Vin to step-change in load cur-
rent (50-75-50% of Iout max; di/dt=3A/ s). Load cap: 470 F, 25m ESR
tantalum and 10 F ceramic. Top: Vout (100mV/div), Bottom: Iout (5A/div).
µ
µ
Ω
µ
µ
Ω
µ
µ
Product # NQ04T33VMA16 Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B 7/6/04 Page 10
Performance Curves
Non-Isolated
3.0 - 5.5V
16A
SIP Converter
in
3.3Vout
2.5Vout
2.5Vout
1.8Vout
1.5Vout
1.8Vout
1.5Vout
1.2Vout
1.0Vout
0.9Vout
0.75Vout
1.2Vout
1.0Vout
0.9Vout
0.75Vout
Figure 19: Turn-on transient at 3.3Vin and full load (resistive load)
(2ms/div). Ch 1: ON/OFF input (2V/div). Ch 2-8: Vout (500mV/div)
Figure 20: Turn-on transient at 5.0Vin and full load (resistive load)
(2ms/div). Ch 1: ON/OFF input (2V/div). Ch 2-8: Vout (500mV/div)
3.3Vout
2.5Vout
2.5Vout
1.8Vout
1.5Vout
1.8Vout
1.5Vout
1.2Vout
1.0Vout
0.9Vout
0.75Vout
1.2Vout
1.0Vout
0.9Vout
0.75Vout
Figure 21: Turn-on transient at 3.3Vin and zero load (2ms/div). Ch 1:
Figure 22: Turn-on transient at 5.0Vin and zero load (2ms/div). Ch 1:
ON/OFF input (2V/div). Ch 2-8: Vout (500mV/div)
ON/OFF input (2V/div). Ch 2-8: Vout (500mV/div)
7
6
5
4
3
2
7
6
5
4
3
2
Max Rise Time
Min Rise Time
Max Delay Time
Min Delay Time
1
1
0
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Output Voltage (V)
Output Voltage (V)
Figure 23: Minimum and Maximum Startup Delay Time (enable to
Figure 24: Minimum and Maximum Startup Rise Time (10% to 90%)
10%) over temperature versus output voltage (includes trimming).
over temperature versus output voltage (includes trimming).
Product # NQ04T33VMA16
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7/6/04
Page 11
Performance Curves
Non-Isolated
3.0 - 5.5V
16A
SIP Converter
in
14.0
12.0
10.0
8.0
Figs. 26-27
<1 µH
Figs. 24-25
source
impedance
Figs. 28-29
0.9V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
iS
iC
DC/DC
Converter
VOUT
6.0
4.0
VSOURCE
15
µ
Ω
F,
ESR
10 µF
C*
2.0
ceramic
100m
capacitor
tantalum
0.0
capacitor
* See values for recommended external input
capacitance. Inductor optional as needed. Reduce
0
500
1000
1500
2000
2500
3000
3500
4000
to <0.3µH for Cout > 1000µF, unless Cin > Cout.
Load Capacitance (uF)
Figure 25: Maximum Startup Load Current versus Load Capacitance.
Derate the load during startup according to this figure to avoid the pos-
sibility of over-current shutdown.
Figure 26: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figs 27-28), Input Reflected Ripple Current
(Figs 29-30) and Output Voltage Ripple (Figs 31-32).
0.9Vout
1.0Vout
0.9Vout
1.0Vout
1.2Vout
1.2Vout
1.5Vout
1.5Vout
1.8Vout
1.8Vout
2.5Vout
2.5Vout
3.3Vout
Figure 27: Input Terminal Ripple Current, i , at 15A load and 3.3V
Figure 28: Input Terminal Ripple Current, i , at 15A load and 5.0V
c
c
input voltage with 1
µ
H source impedance and 200
µ
F tantalum capaci-
input voltage with 1
µ
H source impedance and 200
µ
F tantalum capaci-
tor (5A/div). See Figure 26.
tor (5A/div). See Figure 26.
0.9Vout
0.9Vout
1.0Vout
1.2Vout
1.0Vout
1.2Vout
1.5Vout
1.8Vout
1.5Vout
1.8Vout
2.5Vout
3.3Vout
2.5Vout
Figure 29: Input Reflected Ripple Current, i , through a 1
µ
H source
Figure 30: Input Reflected Ripple Current, i , through a 1µH source
s
s
inductor at 3.3V input voltage and 15A load current (100 mA/div). See
inductor at 5.0V input voltage and 15A load current (100 mA/div). See
Figure 26.
Figure 26.
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7/6/04
Page 12
Performance Curves
Non-Isolated
3.0 - 5.5V
16A
SIP Converter
in
0.9Vout
0.9Vout
1.0Vout
1.0Vout
1.2Vout
1.2Vout
1.5Vout
1.5Vout
1.8Vout
1.8Vout
2.5Vout
2.5Vout
3.3Vout
Figure 31: Output Voltage Ripple at 3.3V input voltage and 15A load
current (10 mV/div). Load capacitance: 10 F ceramic capacitor and
15 F tantalum capacitor. Bandwidth: 20 MHz. See Figure 26.
Figure 32: Output Voltage Ripple at 5.0V input voltage and 15A load
current (10 mV/div). Load capacitance: 10 F ceramic capacitor and
15 F tantalum capacitor. Bandwidth: 20 MHz. See Figure 26.
µ
µ
µ
µ
Figure 33: Load current (10A/div) as a function of time when a 3.3Vin,
0.9Vo unit attempts to turn on into a 10 m short circuit. Top trace
(100 s/div) is an expansion of the on-time portion of the bottom trace.
Figure 34: Load current (10A/div) as a function of time when a 5.0Vin,
0.9Vo unit attempts to turn on into a 10 m short circuit. Top trace
(100 s/div) is an expansion of the on-time portion of the bottom trace.
Ω
Ω
µ
µ
Figure 35: Load current (10A/div) as a function of time when a 3.3Vin,
2.5Vo unit attempts to turn on into a 10 m short circuit. Top trace
(100 s/div) is an expansion of the on-time portion of the bottom trace.
Figure 36: Load current (10A/div) as a function of time when a 5.0Vin,
3.3Vo unit attempts to turn on into a 10 m short circuit. Top trace
(100 s/div) is an expansion of the on-time portion of the bottom trace.
Ω
Ω
µ
µ
Product # NQ04T33VMA16 Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B 7/6/04 Page 13
Performance Curves
Non-Isolated
3.0 - 5.5V
16A
SIP Converter
in
0.1
0.01
0.1
0.01
0.9 V
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
0.9 V
1.2 V
1.5 V
1.8 V
2.5 V
0.001
0.0001
0.001
0.0001
10
10
100
1,000
Hz
10,000
100,000
100
1,000
Hz
10,000
100,000
Figure 37: Magnitude of incremental output impedance (Z
=
Figure 38: Magnitude of incremental output impedance (Z
=
out
out
v
/i ) for 3.3V input voltage at 15A load.
out out
v
/i ) for 5.0V input voltage at 15A load.
out out
0
-5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
0.9 V
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
0.9 V
1.2 V
1.5 V
1.8 V
2.5 V
10
100
1,000
Hz
10,000
100,000
10
100
1,000
Hz
10,000
100,000
Figure 39: Magnitude of incremental forward transmission (FT =
/v ) for 3.3V input voltage at 15A load.
Figure 40: Magnitude of incremental forward transmission (FT =
/v ) for 5.0V input voltage at 15A load.
v
v
out in
out in
10
5
10
5
0.9 V
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
0.9 V
1.2 V
1.5 V
1.8 V
2.5 V
0
0
-5
-5
-10
-15
-10
-15
10
100
1,000
Hz
10,000
100,000
10
100
1,000
Hz
10,000
100,000
Figure 41: Magnitude of incremental reverse transmission (RT =
/i ) for 3.3V input voltage at 15A load.
Figure 42: Magnitude of incremental reverse transmission (RT =
i /i ) for 5.0V input voltage at 15A load.
in out
i
in out
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7/6/04
Page 14
Performance Curves
Non-Isolated
3.0 - 5.5V
16A
SIP Converter
in
1
10
1
0.9 V
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
0.9 V
1.2 V
1.5 V
1.8 V
2.5 V
0.1
0.1
0.01
0.01
10
10
100
1,000
Hz
10,000
100,000
100
1,000
Hz
10,000
100,000
Figure 43: Magnitude of incremental input impedance (Z = v /i
)
Figure 44: Magnitude of incremental input impedance (Z = v /i
in in
)
in
in in
in
for 3.3V input voltage at 15A load.
for 5.0V input voltage at 15A load.
Product # NQ04T33VMA16
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Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 15
Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
between Pin 10 (TRIM) and the Common Ground Pins. To
acheive a desired output voltage Vout, the value of the resistor
should be:
BASIC OPERATION AND FEATURES
The NiQor series non-isolated converter uses a buck-converter
that keeps the output voltage constant over variations in line,
load, and temperature. The NiQor modules employ synchro-
nous rectification for very high efficiency.
21070
_
=
(Ω)
Rtrim
5110
_
VOUT 0.7525
Dissipation throughout the converter is so low that it does not
require a heatsink or metal baseplate for operation. The NiQor
converter can thus be built more simply and reliably using high
yield surface mount techniques on a single PCB substrate.
For example, to program an output voltage of 3.3V, the Rtrim
resistor value is calculated as follows:
R
trim = (21070/(3.3-0.7525)) - 5110 = 3.16 kΩ
The NiQor series of SIPs and SMT converters uses the estab-
lished industry standard footprint and pin-out configurations.
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
CONTROL FEATURES
Total DC Variation of Vout: For the converter to meet its
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should
not be greater than that specified for the output voltage trim
range.
REMOTE ON/OFF (Pin 11): The ON/OFF input, Pin 11,
permits the user to control when the converter is on or off. There
are currently two options available for the ON/OFF input
described in the table below. (contact factory for other options)
Pin-Open
Option
Description Converter state Pin Action
PROTECTION FEATURES
N Logic Negative
Off
On
On
Pull Low = On
Pull High = Off
Pull Low = Off
O Logic Negative/Open
P Logic Positive/Open
Input Under-Voltage Lockout: The converter is designed
to turn off when the input voltage is too low, helping avoid an
input system instability problem, described in more detail in the
application note titled “Input System Instability”. The lockout cir-
cuitry is a comparator with DC hysteresis. When the input volt-
age is rising, it must exceed the typical Turn-On Voltage
Threshold value (listed on the specification page) before the
converter will turn on. Once the converter is on, the input volt-
age must fall below the typical Turn-Off Voltage Threshold value
before the converter will turn off.
Figure A is a schematic view of the internal ON/OFF circuitry.
Vin
Vin
(N logic only)
10K
10K
1K
PWM
Enable
ON/OFF
ON/OFF
20K
Over Current Shutdown: The converter uses the control
(high-side) MOSFET on-resistance to detect short circuit or
excessive over-current conditions. The converter compensates
for the temperature variation of the MOSFET on-resistance,
keeping the overcurrent threshold roughly constant over tem-
perature. Very short (<1mS) over-current pulses will see a
slightly higher apparent threshold than longer duration over-
current events. This makes the converter less susceptible to shut-
down from transient load conditions. However, once the over-
current threshold is reached the converter ceases PWM opera-
tion within microseconds. After an over-current shutdown, the
converter will remain off for an inhibit period of 18 to 32 mil-
liseconds, and then attempt a soft-start. Depending on the
impedance or current level of the overload condition, the con-
verter will enter a "hiccup mode" where it repeatedly turns on
PWM
Enable
20K
15K
Negative
Logic (N,O)
Positive
Logic (P)
Figure A: Simplified Schematic of internal ON/OFF circuitry
OUTPUT VOLTAGE TRIM (Pin 10): The TRIM input permits
the user to adjust the output voltage according to the trim range
specifications by using an external resistor. If the TRIM feature
is not being used, leave the TRIM pin disconnected.
TRIM (wide trim output unit): The output voltage of the
NQ04T33 module can be programmed to any voltage from
0.85 to 3.6V by connecting a single external resistor Rtrim
Product # NQ04T33VMA16
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7/6/04
Page 16
Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
and off at a frequency of 25 to 50 Hz, until the overload or
short circuit condition is removed.
resistive, essentially just the ESR.
In this example, at full load, that would stress the tantalum input
capacitor to about 3A rms ripple current, possibly beyond its
rating. Placing an additional 40µF of ceramic in parallel with
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents dam-
age to the load circuit due to 1) excessive series resistance in
output current path from converter output pins to sense point, 2)
a release of a short-circuit condition, or 3) a release of a cur-
rent limit condition. Load capacitance determines exactly how
high the output voltage will rise in response to these conditions.
After 2-4 ms, the converter will automatically restart. Note the
wide trim model has a typical OVP threshold of 4.1V.
that capacitor would reduce the ripple current to about 1.5A,
o
probably within its rating at 85 C. The input ripple current is
proportional to load current, so this example should be scaled
down according to the actual load current.
Additional input capacitance equal to half of the output capac-
itance is recommended when operating with more than 1000uF
of output capacitance on lower voltage outputs when trimming
down by more than half of the trim-down allowance (e.g., fur-
ther than -2.5% on a 0.9V, or -5% on a 1.2V).
Over-Temperature Shutdown: A temperature sensor on
the converter senses the average temperature of the module.
The thermal shutdown circuit is designed to turn the converter
off when the temperature at the sensed location reaches the
Over-Temperature Shutdown value. It will allow the converter to
turn on again when the temperature of the sensed location falls
by the amount of the Over-Temperature Shutdown Restart
Hysteresis value.
Input inductance should be reduced for maintaining input sta-
bility when operating with large output capacitance
(>1000
good phase margin with up to the 4000
capacitance. If the input inductance must be increased up to
H even with large output capacitance (>1000 F), an input
µF). Reducing input inductance to <0.3
µH provides for
F maximum output
µ
1
µ
µ
capacitance equal to or greater than the output capacitance
may be needed to compensate the input impedance.
APPLICATION CONSIDERATIONS
If no inductor is used to isolate the input ripple of the NiQor
converters from the source or from inputs of other NiQor con-
verters, then this external capacitance might be provided by the
DC/DC converter used as the power source. SynQor's
PowerQor series converters typically have tantalum and ceram-
ic output capacitors that would provide the damping.
Input and Output Filtering: SynQor recommends an exter-
nal input capacitor of either a tantalum, polymer or aluminum
electrolytic type on the input of the NQ03/NQ04 series non-
isolated converters. This capacitance and resistance primarily
provides damping of the input filter, reduces the source imped-
ance and guarantees input stability (see SynQor application
note "Input System Instability"). The input filter is formed by any
source or wiring inductance and the converter’s input capaci-
tance. The external capacitance also provides an additional
benefit of ripple voltage reduction.
An input inductor would help isolate the ripple currents and
voltages from the source or other NiQor style converters on the
voltage supply rail. If an input inductor is used, the recom-
mended capacitance should guarantee stability and control the
ripple current for up to 1.0µH of input inductance.
A modest sized capacitor would suffice in most conditions, such
as a 330µF, 16V tantalum, with an ESR of approximately 50
The input inductor need not have very high inductance.
A
mΩ. The NiQor family converters have an internal ceramic
input capacitor to reduce ripple current stress on the external
capacitors. An external ceramic capacitor of similar size
(330µF) with a series resistor of approximately 50 mΩ would
also suffice and would provide the filter damping.
value of 250 nanohenries would equate to almost 500 miliohm
of series impedance at the switching frequency of 300 kHz.
This would be working against an assumed capacitive ESR of
30mΩ on the supply side of the inductor, providing significant
isolation and ripple reduction.
Additional ceramic capacitance may be needed on the input,
in parallel with the tantalum capacitor, to relieve ripple current
stress on the tantalum capacitors. The external capacitance
No external capacitance is required at the output, however, the
ripple voltage can be further reduced if ceramic and tantalum
capacitors are added at the output. Since the internal output
forms a current divider with the 40
tance. At 300 kHz., the impedance of the internal capacitance
is about 15mΩ capacitive. At that frequency, an SMT 330
tantalum capacitor would have an impedance of about 50mΩ
µF internal ceramic capaci-
capacitance is about 50µF, approximately that amount of
ceramic capacitance would be needed to produce a noticeable
reduction in output ripple. The value of the tantalum capacitors
is both to provide a high capacitance for pulsed loads and to
µF
Product # NQ04T33VMA16
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Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
provide damping of the distribution network with their inherent
ESR, which is low, but higher than ceramics. Additional output
of the pulsed source to the output voltage divided by the input
voltage.
capacitance in the range of 300-500µF is beneficial for reduc-
ing the deviation in response to a fast load transient.
The only error in this simplified model is that it ignores the
inductive current in the choke, usually less than 20% of the load
current, and it ignores the resistive losses inside the NiQor con-
verter, which would alter the duty cycle very slightly.
Input Over-Voltage Prevention: The power system
designer must take precautions to prevent damaging the NiQor
converters by input overvoltage. This is another reason to be
careful about damping the input filter so that no ringing occurs
from an underdamped filter. The voltage must be prevented
from exceeding the absolute maximum voltage indicated in the
Electrical Specifications section of the data sheet under all con-
ditions of turn-on, turn-off and load transients and fault condi-
tions. The power source should have an over voltage shutdown
threshold as close as reasonably possible to the operating
point.
The model is a good guide for calculating the effects of exter-
nal input capacitors and other filter elements on ripple voltage
and ripple current stress on capacitors.
40
µF
INPUT
I
<1mΩ
p-p
Additional protection can come from additional input capaci-
tance, perhaps on the order of 1,000µF, but contingent on the
I
= I
Load
p-p
source inductance value. A large source inductance would
require more capacitance to keep the input voltage below the
absolute maximum, if the load current were interrupted sud-
denly. This can be caused by either a shutdown of the NiQor
from a fault or from the load itself, for example when a card is
hot-swapped out, suddenly dropping the load to zero. This is
further justification for keeping the source inductance low, as
mentioned above. When the power source is configured with
remote sensing, the series resistance of the filter inductor and
any other conductors or devices between the source and the
sense point will result in a voltage drop which, in the event of
a load current interruption, would add to the NiQor input volt-
age.
Figure B: Equivalent model for input ripple
High Capacitance Loads with Backdrive: When using
two or more NiQor converters with high capacitance loads
(greater than 1,000µF), special consideration must be given to
the following condition. If a back-drive source is feeding volt-
age back to a NiQor output, perhaps through some ASIC or
other load device, and the back-driving source is greater than
60% of the input voltage to the NiQor that has not been
enabled yet, an overcurrent condition may exist on startup. This
condition could prevent a proper startup when the second
NiQor is enabled. The condition is caused by the second
NiQor having to ramp the voltage to a high duty cycle with a
high capacitance load, which can trip the overcurrent shut-
down, preventing a startup. The following remedies for this sit-
uation can be applied:
A TVS device could also be used to clamp the voltage level dur-
ing these conditions, but the relatively narrow range between
operating voltage and the absolute maximum voltage restrict
the use of these devices to lower source current levels that will
not drive the transient voltage suppressor above the voltage
limit when all the source current is flowing into the clamp. A
TVS would be a good supplemental control, in addition to care-
ful selection of inductance and capacitance values.
1) Limit output capacitance on higher voltage outputs to
1,000µF. OR,
2) Prevent back-drive conditions that raise the off-state output
voltage to more than 60% of the input voltage.
Equivalent Model for Input Ripple: A simple but reason-
ably accurate model of input ripple is to treat the NiQor input
as a pulsed AC current source at 300 kHz.in parallel with a
very low ESR capacitor, see Figure B. The peak-to-peak current
of the source model is equal to the NiQor load current, repre-
senting the peak current in the NiQor's smoothing choke. The
capacitor represents the 40µF input ceramic capacitance of the
NiQor converter, with a nearly negligible ESR of less than 1
mΩ. A further refinement can be made by setting the duty cycle
Thermal Considerations: For vertical mount applications
at elevated temperatures that call for forced air cooling (see
thermal derating curves - measured using 6 layer 2oz copper
board), the preferred airflow direction is from pin 11 to pin 1,
as indicated in the thermal images provided. If airflow is in the
opposite direction (pin 1 to pin 11) the power devices will run
O
hotter by about 5 C (corresponding to an additional 1 ampere
of load derating at conditions where derating occurs).
Product # NQ04T33VMA16
Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B
7/6/04
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Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
For horizontal mount applications (NQ0xxxxHMA parts),
where the inductor and power devices are facing down, the
preferred airflow direction is into the leading edge opposite the
pin header edge, such that air flowing under the NiQor PCB
flows out between the pins and the inductor. With this airflow
direction, and with the inductor firmly contacting the applica-
tion board, the user can apply the thermal derating curves pro-
vided herein (measured using 6 layer 2oz copper board) for
vertical mount with airflow from pin 11 to pin 1. Airflows in
other directions across the horizontally mounted NiQor will
tion on the current share feature will be provided in a future
revision of this technical specification. Please contact SynQor
engineering support for further details.
O
result in temperatures that are higher by about 5 C with pin 11
O
to pin 1 airflow and about 10 C with pin 1 to pin 11 airflow.
O
Also, temperature increases of up to 10 C (2 Amp lower der-
ating) can be expected if the inductor thermal interface does
not make good contact to the customer's circuit board.
Layout Suggestion: When using a fixed output NiQor con-
verter, the designer may chose to use the trim function and
would thus be required to reserve board space for a trim resis-
tor. It is suggested that even if the designer does not plan to use
the trim function, additional space should be reserved on the
board for a trim resistor. This will allow the flexibility to use the
wide output voltage trim range NiQor module at a later date.
Any trim resistor should connect to the ground or output node
at one of the respective pins of the NiQor, so as to prevent the
trim level from being affected by load drops through the ground
or power planes.
OPTIONAL FEATURES
REMOTE SENSE(+) (Pin
3 - Optional): The optional
SENSE(+) input corrects for voltage drops along the conductors
that connect the converter’s output pins to the load.
Pin 3 should be connected to Vout(+) at the point on the board
where regulation is desired. A remote connection at the load
can adjust for a voltage drop only as large as that specified in
this datasheet, that is
Vout(+) – SENSE(+) < Sense Range % x Vout
Pin 3 must be connected for proper regulation of the output volt-
age. If these connections are not made, the converter will deliv-
er an output voltage that is slightly higher than its specified
value.
Note: the output over-voltage protection circuit senses the volt-
age across the output (pins 1, 2 and 4) to determine when it
should trigger, not the voltage across the converter’s sense lead
(pin 3).
CURRENT SHARE (Pin A - Optional): Additional informa-
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Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 19
Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5V
16A
in
ORDERING INFORMATION
PART NUMBERING SYSTEM
The tables below show the valid model numbers and order-
ing options for converters in this product family. When
ordering SynQor converters, please ensure that you use the
complete 15 character part number consisting of the 12
character base part number and the additional 3 characters
for options.
The part numbering system for SynQor’s NiQor DC/DC con-
verters follows the format shown in the example below.
NQ 04 T33 V M A 16 O R S
Options (see
Ordering Information)
Output Current
Thermal Design
Output Max Output
Model Number
Input Voltage
Performance Level
Packaging (see Order Info)
Output Voltage
NQ04009pMA15xyz 3.0 - 5.5 V
NQ04010pMA15xyz 3.0 - 5.5 V
NQ04012pMA15xyz 3.0 - 5.5 V
NQ04015pMA15xyz 3.0 - 5.5 V
NQ04018pMA15xyz 3.0 - 5.5 V
NQ04025pMA15xyz 3.0 - 5.5 V
NQ04033pMA15xyz 4.5 - 5.5 V
NQ04T33pMA16xyz 3.0 - 5.5 V
0.9 V
15 A
1.0 V
1.2 V
15 A
15 A
15 A
15 A
15 A
15 A
16 A
1.5 V
Input Voltage
1.8 V
Product Family
2.5 V
3.3 V
0.85-3.6V
The first 12 characters comprise the base part number and
the last 3 characters indicate available options. Although
there are no default values for packaging, enable logic, pin
length and feature set, the most common options are vertical
mount SIP (V), Negative/Open logic (O), 0.160” pins (R)
and Sense feature set (S). These part numbers are more like-
ly to be readily available in stock for evaluation and proto-
type quantities.
* NQ04 15amp part numbers represent fixed output voltage units
(see separate datasheets for NQ04xxxxMA15xxx modules).
The following option choices must be included in place of
the p x y z spaces in the model numbers listed above.
Packaging: p
Options Description: x y z
Packaging
Enable Logic
Pin Style
Feature Set
R - 0.160"
(Standard)
N - Negative
O - Neg./Open
P - Pos./Open
V - Vert. Mount SIP
H - Horz. Mount SIP
S - Sense (Std.)
N - None
Application Notes
V - 0.160" (Vert
Reversed)
A variety of application notes and technical white papers
can be downloaded in pdf format at www.synqor.com.
Contact SynQor for further information:
Warranty
SynQor offers a three (3) year limited warranty. Complete warranty
information is listed on our web site or is available upon request from
SynQor.
Phone:
Toll Free: 888-567-9596
Fax:
978-849-0600
978-849-0602
E-mail:
Web:
sales@synqor.com
www.synqor.com
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor for its use, nor for any
infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any
patent or patent rights of SynQor.
Address: 155 Swanson Road
Boxborough, MA 01719
Product # NQ04T33VMA16
Phone 1-888-567-9596
Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 20
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