LM2852YMXAX-3.3 [TI]
LM2852 2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck Regulator; LM2852 2A 500 / 1500kHz同步SIMPLE SWITCHER®降压稳压器型号: | LM2852YMXAX-3.3 |
厂家: | TEXAS INSTRUMENTS |
描述: | LM2852 2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck Regulator |
文件: | 总23页 (文件大小:981K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LM2852
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LM2852 2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck Regulator
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1
FEATURES
DESCRIPTION
The LM2852 SIMPLE SWITCHER® synchronous
2
•
Input Voltage Range of 2.85 to 5.5V
buck regulator is
a high frequency step-down
•
Factory EEPROM Set Output Voltages from
0.8V to 3.3V in 100mV Increments
switching voltage regulator capable of driving up to a
2A load with excellent line and load regulation. The
LM2852 can accept an input voltage between 2.85V
and 5.5V and deliver an output voltage that is factory
programmable from 0.8V to 3.3V in 100mV
increments. The LM2852 is available with a choice of
two switching frequencies - 500kHz (LM2852Y) or
1.5MHz (LM2852X). It also features internal, type-
three compensation to deliver a low component count
solution. The exposed-pad HTSSOP-14 package
enhances the thermal performance of the LM2852.
•
•
•
•
•
•
•
Maximum Load Current of 2A
Voltage Mode Control
Internal Type-Three Compensation
Switching Frequency of 500kHz or 1.5MHz
Low Standby Current of 10µA
Internal 60 mΩ MOSFET Switches
Standard Voltage Options
0.8/1.0/1.2/1.5/1.8/2.5/3.3 Volts
APPLICATIONS
•
•
Low Voltage Point of Load Regulation
Local Solution for FPGA/DSP/ASIC Core
Power
•
•
Broadband Networking and Communications
Infrastructure
Portable Computing
Typical Application Circuit
V
= 3.3V
IN
PVIN
AVIN
EN
SNS
SW
LM2852Y
SGND
V
I
= 2.5V
OUT
= 0A to 2A
LOAD
C
IN
= 22 mF
SS
L
= 10 mH
O
+
PGND
C
O
= 100 mF
C
SS
= 2.7 nF
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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LM2852
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Figure 1. Efficiency vs ILOAD
96
PVIN = 3.3V
94
92
90
88
86
84
0.1
1.0
10
I
(A)
LOAD
Connection Diagram
AVIN
EN
1
2
3
4
5
6
7
14
SNS
NC
13
12
11
10
9
SGND
SS
NC
LM2852
PGND
PGND
SW
NC
PVIN
PVIN
8
SW
Figure 2. 14-Pin HTSSOP – Top View
See Package Number PWP0014A
PIN DESCRIPTIONS
AVIN (Pin 1): Chip bias input pin. This provides power to the logic of the chip. Connect to the input voltage or a separate rail.
EN (Pin 2): Enable. Connect this pin to ground to disable the chip; connect to AVIN or leave floating to enable the chip; enable is internally
pulled up.
SGND (Pin 3): Signal ground.
SS (Pin 4): Soft-start pin. Connect this pin to a small capacitor to control startup. The soft-start capacitance range is restricted to values 1
nF to 50 nF.
NC (Pins 5, 12 and 13): No connect. These pins must be tied to ground or left floating in the application.
PVIN (Pins 6, 7): Input supply pin. PVIN is connected to the input voltage. This rail connects to the source of the internal power PFET.
SW (Pins 8, 9): Switch pin. Connect to the output inductor.
PGND (Pins 10, 11): Power ground. Connect this to an internal ground plane or other large ground plane.
SNS (Pin 14): Output voltage sense pin. Connect this pin to the output voltage as close to the load as possible.
Exposed Pad: Connect to ground.
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)(2)
PVIN, AVIN, EN, SNS
ESD Susceptibility(3)
−0.3V to 6.5V
2kV
Power Dissipation
Internally Limited
−65°C to +150°C
150°C
Storage Temperature Range
Maximum Junction Temp.
Infrared (15 sec)
220°C
14-Pin Exposed Pad HTSSOP Package
Soldering (10 sec)
Vapor Phase (60 sec)
215°C
260°C
(1) Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Range indicates conditions for
which the device is intended to be functional, but does not ensure specfic performance limits. For ensured specifications and test
conditions, see the Electrical Characteristics.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) Human body model: 1.5kΩ in series with 100pF. SW and PVIN pins are derated to 1.5kV
Operating Ratings(1)
PVIN to GND
AVIN to GND
Junction Temperature
θJA
1.5V to 5.5V
2.85V to 5.5V
−40°C to +125°C
38°C/W
(1) Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Range indicates conditions for
which the device is intended to be functional, but does not ensure specfic performance limits. For ensured specifications and test
conditions, see the Electrical Characteristics.
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Electrical Characteristics
AVIN = PVIN = 5V unless otherwise indicated under the Conditions column. Limits in standard type are for TJ = 25°C only;
limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are
ensured through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C,
and are provided for reference purposes only.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
SYSTEM PARAMETERS
VOUT
VOUT = 0.8V option
0.782
0.9775
1.1730
1.4663
1.7595
2.4437
2.9325
3.2257
0.818
1.0225
1.2270
1.5337
1.8405
2.5563
3.0675
3.3743
VOUT = 1.0V option
VOUT = 1.2V option
VOUT = 1.5V option
VOUT = 1.8V option
VOUT = 2.5V option
VOUT = 3.0V option
VOUT = 3.3V option
Voltage
V
Tolerance(1)
ΔVOUT/ΔAVIN
VOUT = 0.8V, 1.0V, 1.2V, 1.5V, 1.8V or 2.5V
2.85V ≤ AVIN ≤ 5.5V
0.2
0.2
0.6
0.6
%
%
Line Regulation(1)
Load Regulation
VOUT = 3.3V
3.5V ≤ AVIN ≤ 5.5V
ΔVOUT/ΔIO
Normal operation
Rising
8
mV/A
V
VON
2.47
150
2.85
210
UVLO Threshold
(AVIN)
Falling Hysteresis
85
mV
rDSON-P
rDSON-N
PFET On
Resistance
Isw = 2A
Isw = 2A
75
55
140
120
mΩ
NFET On
Resistance
mΩ
kΩ
RSS
ICL
Soft-start resistance
400
4
LM2852X
LM2852Y
2.75
2.25
4.95
3.65
2
Peak Current Limit
Threshold
A
3
IQ
Operating Current Non-switching
0.85
mA
µA
kΩ
ISD
Shutdown Quiescent
EN = 0V
10
25
Current
RSNS
Sense pin resistance
400
PWM
fosc
LM2852X
LM2852Y
1500kHz option.
500kHz option.
1050
325
0
1500
500
1825
625
kHz
kHz
%
Drange
Duty Cycle Range
100
ENABLE CONTROL(2)
VIH
VIL
IEN
EN Pin Minimum
% of
AVIN
75
High Input
EN Pin Maximum
Low Input
% of
AVIN
25
EN Pin Pullup
Current
EN = 0V
1.2
µA
THERMAL CONTROLS
TSD
TJ for Thermal
Shutdown
165
10
°C
°C
TSD-HYS
Hysteresis for
Thermal Shutdown
(1) VOUT measured in a non-switching, closed-loop configuration at the SNS pin.
(2) The enable pin is internally pulled up, so the LM2852 is automatically enabled unless an external enable voltage is applied.
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LM2852Y Typical Performance Characteristics (500kHz)
Efficiency vs ILoad VOUT = 1.5V
Efficiency vs ILoad VOUT = 2.5V
92
90
88
86
84
82
80
78
76
96
94
92
90
PVIN = 3.3V
PVIN = 3.3V
PVIN = 5.0V
PVIN = 5.0V
88
86
84
0.1
1.0
10
0.1
1.0
10
I
(A)
LOAD
I
(A)
LOAD
Figure 3.
Figure 4.
Efficiency vs ILoad VOUT = 3.3V
Frequency vs Temperature
95
560
550
540
530
520
510
500
490
480
94
93
92
91
90
89
88
87
V
IN
= 3.3V
PVIN = 5.0V
V
IN
= 5V
0.1
1.0
10
-50 -25
0
25 50 75 100 125 150
I
(A)
TEMPERATURE (oC)
LOAD
Figure 5.
Figure 6.
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LM2852X Typical Performance Characteristics (1500kHz)
Efficiency vs ILoad VOUT = 1.5V
Efficiency vs ILoad VOUT = 2.5V
85
80
75
70
65
60
55
50
45
100
90
PVIN = 3.3V
PVIN = 3.3V
80
PVIN = 5.0V
70
PVIN = 5.0V
60
50
40
0.1
1.0
10
0.1
1.0
10
I (A)
LOAD
I
(A)
LOAD
Figure 7.
Figure 8.
Efficiency vs ILoad VOUT = 3.3V
Frequency vs Temperature
90
85
80
75
70
65
60
55
50
1600
1550
1500
1450
1400
1350
1300
1250
1200
PVIN = 3.3V
PVIN = 5.0V
PVIN = 5.0V
-50 -25
0
25 50 75 80 85 90
0.1
1.0
10
TEMPERATURE (oC)
I
(A)
LOAD
Figure 9.
Figure 10.
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LM2852 Typical Performance Characteristics (Both Y and X Versions)
Shutdown Current vs VIN
Quiescent Current (Non-Switching) vs VIN
1100
17
15
13
11
9
1000
900
800
700
600
500
125oC
85oC
125oC
85oC
25oC
25oC
-40oC
7
-40oC
5
2.5
3
3.5
4
4.5
5
5.5
2.5
3
3.5
4
4.5
5
5.5
V
(V)
V
(V)
IN
IN
Figure 11.
Figure 12.
NMOS Switch RDSON vs Temperature
PMOS Switch RDSON vs Temperature
100
90
80
70
60
50
40
130
120
110
100
90
PVIN = 3.3V
PVIN = 3.3V
PVIN = 5.0V
PVIN = 5.0V
80
70
60
50
-50 -25
0
25 50 75 100 125 150
-50 -25
0
25 50 75 100 125 150
TEMPERATURE (oC)
TEMPERATURE (oC)
Figure 13.
Figure 14.
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Block Diagram
SGND
PVIN
Current Limit
Ramp and Clock
Generator
Reference
Oscillator
AVIN
UVLO
DAC
400 kW
EN
SS
Gate
Drive
Error
Amp
SW
-
+
+
-
PWM
Comp
20 pF
Zc1
200 kW
Zc2
200 kW
PGND
SNS
8
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APPLICATIONS INFORMATION
The LM2852 is a DC-DC synchronous buck regulator belonging to Texas Instrument’s SIMPLE SWITCHER
family. Integration of the PWM controller, power switches and compensation network greatly reduces the
component count required to implement a switching power supply. A typical application requires only four
components: an input capacitor, a soft-start capacitor, an output filter capacitor and an output filter inductor.
INPUT CAPACITOR (CIN)
Fast switching of large currents in the buck converter places a heavy demand on the voltage source supplying
PVIN. The input capacitor, CIN, supplies extra charge when the switcher needs to draw a burst of current from
the supply. The RMS current rating and the voltage rating of the CIN capacitor are therefore important in the
selection of CIN. The RMS current specification can be approximated by:
IRMS = ILOAD
D(1-D)
where
•
D is the duty cycle, VOUT/VIN. CIN also provides filtering of the supply.
(1)
Trace resistance and inductance degrade the benefits of the input capacitor, so CIN should be placed very close
to PVIN in the layout. A 22 µF or 47 µF ceramic capacitor is typically sufficient for CIN. In parallel with the large
input capacitance a smaller capacitor may be added such as a 1µF ceramic for higher frequency filtering.
SOFT-START CAPACITOR (CSS)
The DAC that sets the reference voltage of the error amp sources a current through a resistor to set the
reference voltage. The reference voltage is one half of the output voltage of the switcher due to the 200kΩ
divider connected to the SNS pin. Upon start-up, the output voltage of the switcher tracks the reference voltage
with a two to one ratio as the DAC current charges the capacitance connected to the reference voltage node.
Internal capacitance of 20pF is permanently attached to the reference voltage node which is also connected to
the soft-start pin, SS. Adding a soft-start capacitor externally increases the time it takes for the output voltage to
reach its final level.
The charging time required for the reference voltage can be estimated using the RC time constant of the DAC
resistor and the capacitance connected to the SS pin. Three RC time constant periods are needed for the
reference voltage to reach 95% of its final value. The actual start-up time will vary with differences in the DAC
resistance and higher-order effects.
If little or no soft-start capacitance is connected, then the start-up time may be determined by the time required
for the current limit current to charge the output filter capacitance. The capacitor charging equation I = C ΔV/Δt
can be used to estimate the start-up time in this case. For example, a part with a 3V output, a 100 µF output
capacitance and a 3A current limit threshold would require a time of 100 µs:
DV
I
3V
3A
Dt = C
= 100 mF
= 100 ms
(2)
Since it is undesirable for the power supply to start up in current limit, a soft-start capacitor must be chosen to
force the LM2852 to start up in a more controlled fashion based on the charging of the soft-start capacitance. In
this example, suppose a 3 ms start time is desired. Three time constants are required for charging the soft-start
capacitor to 95% of the final reference voltage. So in this case RC=1ms. The DAC resistor, R, is 400 kΩ so C
can be calculated to be 2.5nF. A 2.7nF ceramic capacitor can be chosen to yield approximately a 3ms start-up
time.
SOFT-START CAPACITOR (CSS) AND FAULT CONDITIONS
Various fault conditions such as short circuit and UVLO of the LM2852 activate internal circuitry designed to
control the voltage on the soft-start capacitor. For example, during a short circuit current limit event, the output
voltage typically falls to a low voltage. During this time, the soft-start voltage is forced to track the output so that
once the short is removed, the LM2852 can restart gracefully from whatever voltage the output reached during
the short circuit event. The range of soft-start capacitors is therefore restricted to values 1nF to 50nF.
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COMPENSATION
The LM2852 provides a highly integrated solution to power supply design. The compensation of the LM2852,
which is type-three, is included on-chip. The benefit to integrated compensation is straightforward, simple power
supply design. Since the output filter capacitor and inductor values impact the compensation of the control loop,
the range of L, C and CESR values is restricted in order to ensure stability.
OUTPUT FILTER VALUES
Table 1 details the recommended inductor and capacitor ranges for the LM2852 that are suggested for various
typical output voltages. Values slightly different than those recommended may be used, however the phase
margin of the power supply may be degraded.
Table 1. Output Filter Values
Frequency Option
VOUT (V)
PVIN (V)
L (µH)
C (µF)
CESR (mΩ)
Max
Min
10
10
10
10
10
15
10
22
10
22
6.8
15
15
Max
15
15
15
15
15
22
15
22
15
33
10
22
22
Min
100
100
100
100
100
100
100
100
100
100
68
Max
220
120
180
180
180
120
120
120
120
120
120
120
100
Min
70
0.8
0.8
1.0
1.0
1.2
1.2
1.5
1.5
1.8
1.8
2.5
2.5
3.3
0.8
0.8
1.0
1.0
1.2
1.2
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
5.0
200
200
200
200
200
200
200
200
200
200
275
275
275
70
70
70
70
70
LM2852Y
(500kHz)
70
70
100
100
95
68
95
68
100
The 1500kHz version is
designed for ceramic output
capacitors which typically have
very low ESR (<10mΩ.)
LM2852X
(1500kHz)
1
10
10
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CHOOSING AN INDUCTANCE VALUE
The current ripple present in the output filter inductor is determined by the input voltage, output voltage, switching
frequency and inductance according to the following equation:
D x (VIN - VOUT
)
DIL =
f x L
where
•
•
•
•
•
•
ΔIL is the peak-to-peak current ripple.
D is the duty cycle VOUT/VIN.
VIN is the input voltage applied to the PVIN pin.
VOUT is the output voltage of the switcher.
f is the switching frequency.
L is the inductance of the output filter inductor.
(3)
Knowing the current ripple is important for inductor selection since the peak current through the inductor is the
load current plus one half the ripple current. Care must be taken to ensure the peak inductor current does not
reach a level high enough to trip the current limit circuitry of the LM2852.
As an example, consider a 5V to 1.2V conversion and a 500kHz switching frequency. According to Table 1, a
15µH inductor may be used. Calculating the expected peak-to-peak ripple,
1.2V
(5V - 1.2V)
x
5V
500 kHz x 15 mH
DIL =
= 121.6 mA
(4)
The maximum inductor current for a 2A load would therefore be 2A plus 60.8 mA, 2.0608A. As shown in the
ripple equation, the current ripple is inversely proportional to inductance.
OUTPUT FILTER INDUCTORS
Once the inductance value is chosen, the key parameter for selecting the output filter inductor is its saturation
current (Isat) specification. Typically Isat is given by the manufacturer as the current at which the inductance of the
coil falls to a certain percentage of the nominal inductance. The Isat of an inductor used in an application should
be greater than the maximum expected inductor current to avoid saturation. Below is a table of inductors that
may be suitable in LM2852 applications.
Table 2. LM2852 Output Filter Inductors
Inductance (µH)
Part Number
DO1608C-102
Vendor
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
1
1
DO1813P-102HC
DO3316P-682
6.8
7
MSS1038-702NBC
DO3316P-103
10
10
12
15
15
18
22
22
22
27
33
33
MSS1038-103NBC
MSS1038-123NBC
D03316P-153
MSS1038-153NBC
MSS1038-183NBC
DO3316P-223
MSS1038-223NBC
DO3340P-223
MSS1038-273NBC
MSS1038-333NBC
DO3340P-333
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OUTPUT FILTER CAPACITORS
The capacitors that may be used in the output filter with the LM2852 are limited in value and ESR range
according to Table 1. Below are some examples of capacitors that can typically be used in an LM2852
application.
Table 3. LM2852 Output Filter Capacitors
Capacitance (µF)
Part Number
Chemistry
Ceramic
Vendor
Murata
10
GRM31MR61A106KE19
GRM32DR61E106K
595D686X_010C2T
595D686X_016D2T
595D107X_6R3C2T
595D107X_016D2T
NOSC107M004R0150
NOSD107M006R0100
595D127X_004C2T
595D127X_010D2T
595D157X_004C2T
595D157X_016D2T
NOSC157M004R0150
NOSD157M006R0100
595D227X_004D2T
NOSD227M004R0100
NOSE227M006R0100
10
Ceramic
Murata
68
Tantalum
Vishay - Sprague
Vishay - Sprague
Vishay - Sprague
Vishay - Sprague
AVX
68
Tantalum
100
100
100
100
120
120
150
150
150
150
220
220
220
Tantalum
Tantalum
Niobium Oxide
Niobium Oxide
Tantalum
AVX
Vishay - Sprague
Vishay - Sprague
Vishay - Sprague
Vishay - Sprague
AVX
Tantalum
Tantalum
Tantalum
Niobium Oxide
Niobium Oxide
Tantalum
AVX
Vishay - Sprague
AVX
Niobium Oxide
Niobium Oxide
AVX
SPLIT-RAIL OPERATION
The LM2852 can be powered using two separate voltages for AVIN and PVIN. AVIN is the supply for the control
logic; PVIN is the supply for the power FETs. The output filter components need to be chosen based on the
value of PVIN. For PVIN levels lower than 3.3V, use output filter component values recommended for 3.3V. PVIN
must always be equal to or less than AVIN.
PVIN = 3.3V
AVIN = 5V
PVIN
SNS
SW
AVIN
EN
V
= 1.5V
LM2852Y
OUT
C
IN
= 47 mF
I
= 0A to 2A
LOAD
1 mF
SS
L
= 10 mH
+
O
SGND
PGND
CO = 100 mF
C
= 3.3 nF
SS
SWITCH NODE PROTECTION
The LM2852 includes protection circuitry that monitors the voltage on the switch pin. Under certain conditions,
switching is disabled in order to protect the switching devices. One result of the protection circuitry may be
observed when power to the LM2852 is applied with no or light load on the output. The output regulates to the
rated voltage, but no switching may be observed. As soon as the output is loaded, the LM2852 begins normal
switching operation.
LAYOUT HINTS
These are several guidelines to follow while designing the PCB layout for an LM2852 application.
1. The input bulk capacitor, CIN, should be placed very close to the PVIN pin to keep the resistance as low as
possible between the capacitor and the pin. High current levels will be present in this connection.
12
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LM2852
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2. All ground connections must be tied together. Use a broad ground plane, for example a completely filled
back plane, to establish the lowest resistance possible between all ground connections.
3. The sense pin connection should be made as close to the load as possible so that the voltage at the load is
the expected regulated value. The sense line should not run too close to nodes with high EMI (such as the
switch node) to minimize interference.
4. The switch node connections should be low resistance to reduce power losses. Low resistance means the
trace between the switch pin and the inductor should be wide. However, the area of the switch node should
not be too large since EMI increases with greater area. So connect the inductor to the switch pin with a short,
but wide trace. Other high current connections in the application such as PVIN and VOUT assume the same
trade off between low resistance and EMI.
5. Allow area under the chip to solder the entire exposed die attach pad to ground for improved thermal and
electrical performance.
LM2852 Example Circuit Schematic
V
= 3.3V
IN
U
1
PVIN
AVIN
EN
SNS
SW
V
I
= 1.8V
LM2852
OUT
R
= 0A to 2A
f
LOAD
C
f
L
C
C
INX
+
O
IN
SS
SGND
PGND
C
O
C
SS
Figure 15.
Table 4. Bill of Materials for 500kHz (LM2852Y) 3.3VIN to 1.8 VOUT Conversion
ID
U1
Part Number
LM2852YMXA-1.8
Type
Size
Parameters
Qty
1
Vendor
TI
2A Buck
Inductor
Capacitor
Capacitor
Capacitor
Capacitor
Resistor
Capacitor
HTSSOP-14
LO
DO3316P-153
15 µH
1
Coilcraft
CO*
CIN
CINX
CSS
Rf
595D107X_6R3C2T
GRM32ER60J476ME20B
GRM21BR71C105KA01B
VJ0805Y272KXXA
Case Code “C”
1210
100 µF ±20%
47µF/X5R/6.3V
1µF/X7R/16V
2.7nF ±10%
10Ω ±10%
1
Vishay-Sprague
Murata
1
0805
1
Murata
0805
1
Vishay-Vitramon
Vishay-Dale
Murata
CRCW060310R0F
0603
1
Cf
GRM21BR71C105KA01B
0805
1µF/X7R/16V
1
Table 5. Bill of Materials for 1500kHz (LM2852X) 3.3V to 1.8V Conversion
ID
U1
Part Number
LM2852XMXA-1.8
Type
Size
Parameters
Qty
1
Vendor
TI
2A Buck
Inductor
Capacitor
Capacitor
Capacitor
Capacitor
Resistor
Capacitor
HTSSOP-14
L0
DO1813P-102HC
1 µH
1
Coilcraft
Murata
C0
GRM32DR61E106K
GRM32ER60J476ME20B
GRM21BR71C105KA01B
VJ0805Y272KXXA
1210
1210
0805
0805
0603
0805
10 µF/X5R/25V
47µF/X5R/6.3V
1µF/X7R/16V
2.7nF ±10%
10Ω ±10%
1
CIN
CINX
CSS
Rf
1
Murata
1
Murata
1
Vishay-Vitramon
Vishay-Dale
Murata
CRCW060310R0F
1
Cf
GRM21BR71C105KA01B
1µF/X7R/16V
1
Copyright © 2005–2013, Texas Instruments Incorporated
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SNVS325D –JANUARY 2005–REVISED APRIL 2013
www.ti.com
REVISION HISTORY
Changes from Revision C (April 2013) to Revision D
Page
•
Changed layout of National Data Sheet to TI format .......................................................................................................... 13
14
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Product Folder Links: LM2852
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
PACKAGING INFORMATION
Orderable Device
LM2852XMXA-0.8/NOPB
LM2852XMXA-1.0/NOPB
LM2852XMXA-1.2
Status Package Type Package Pins Package
Eco Plan
Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
Device Marking
Samples
Drawing
Qty
(1)
(2)
(6)
(3)
(4/5)
ACTIVE
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
PWP
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
94
Green (RoHS
& no Sb/Br)
CU SN
CU SN
Call TI
CU SN
Call TI
CU SN
CU SN
Call TI
CU SN
CU SN
CU SN
CU SN
CU SN
CU SN
CU SN
CU SN
Call TI
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Call TI
2852X
0.8
ACTIVE
NRND
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
94
94
Green (RoHS
& no Sb/Br)
2852X
1.0
TBD
2852X
1.2
LM2852XMXA-1.2/NOPB
LM2852XMXA-1.5
ACTIVE
NRND
94
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
Call TI
2852X
1.2
94
TBD
2852X
1.5
LM2852XMXA-1.5/NOPB
LM2852XMXA-1.8/NOPB
LM2852XMXA-2.5
ACTIVE
ACTIVE
NRND
94
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Call TI
2852X
1.5
94
Green (RoHS
& no Sb/Br)
2852X
1.8
94
TBD
2852X
2.5
LM2852XMXA-2.5/NOPB
LM2852XMXA-3.0/NOPB
LM2852XMXA-3.3/NOPB
LM2852XMXAX-0.8/NOPB
LM2852XMXAX-1.0/NOPB
LM2852XMXAX-1.2/NOPB
LM2852XMXAX-1.5/NOPB
LM2852XMXAX-1.8/NOPB
LM2852XMXAX-2.5
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
NRND
94
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Call TI
2852X
2.5
94
Green (RoHS
& no Sb/Br)
2852X
3.0
94
Green (RoHS
& no Sb/Br)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
2852X
3.3
2500
2500
2500
2500
2500
2500
Green (RoHS
& no Sb/Br)
2852X
0.8
Green (RoHS
& no Sb/Br)
2852X
1.0
Green (RoHS
& no Sb/Br)
2852X
1.2
Green (RoHS
& no Sb/Br)
2852X
1.5
Green (RoHS
& no Sb/Br)
2852X
1.8
TBD
2852X
2.5
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
Device Marking
Samples
Drawing
Qty
(1)
(2)
(6)
(3)
(4/5)
LM2852XMXAX-2.5/NOPB
LM2852XMXAX-3.0/NOPB
LM2852XMXAX-3.3/NOPB
LM2852YMXA-0.8/NOPB
LM2852YMXA-1.0/NOPB
LM2852YMXA-1.2
ACTIVE
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
PWP
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
2500
Green (RoHS
& no Sb/Br)
CU SN
CU SN
CU SN
CU SN
CU SN
Call TI
CU SN
CU SN
CU SN
Call TI
CU SN
CU SN
CU SN
Call TI
CU SN
CU SN
CU SN
CU SN
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Call TI
-40 to 125
2852X
2.5
ACTIVE
ACTIVE
ACTIVE
ACTIVE
NRND
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
2500
2500
94
Green (RoHS
& no Sb/Br)
2852X
3.0
Green (RoHS
& no Sb/Br)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
2852X
3.3
Green (RoHS
& no Sb/Br)
2852Y
-0.8
94
Green (RoHS
& no Sb/Br)
2852Y
-1.0
94
TBD
2852Y
-1.2
LM2852YMXA-1.2/NOPB
LM2852YMXA-1.3/NOPB
LM2852YMXA-1.5/NOPB
LM2852YMXA-1.8
ACTIVE
ACTIVE
ACTIVE
NRND
94
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Call TI
2852Y
-1.2
94
Green (RoHS
& no Sb/Br)
2852Y
1.3
94
Green (RoHS
& no Sb/Br)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
2852Y
-1.5
94
TBD
2852Y
-1.8
LM2852YMXA-1.8/NOPB
LM2852YMXA-2.5/NOPB
LM2852YMXA-3.0/NOPB
LM2852YMXA-3.3
ACTIVE
ACTIVE
ACTIVE
NRND
94
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Call TI
2852Y
-1.8
94
Green (RoHS
& no Sb/Br)
2852Y
-2.5
94
Green (RoHS
& no Sb/Br)
2852Y
3.0
94
TBD
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
2852Y
-3.3
LM2852YMXA-3.3/NOPB
LM2852YMXAX-0.8/NOPB
LM2852YMXAX-1.0/NOPB
LM2852YMXAX-1.2/NOPB
ACTIVE
ACTIVE
ACTIVE
ACTIVE
94
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
2852Y
-3.3
2500
2500
2500
Green (RoHS
& no Sb/Br)
2852Y
-0.8
Green (RoHS
& no Sb/Br)
2852Y
-1.0
Green (RoHS
& no Sb/Br)
2852Y
-1.2
Addendum-Page 2
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
Device Marking
Samples
Drawing
Qty
(1)
(2)
(6)
(3)
(4/5)
LM2852YMXAX-1.3/NOPB
LM2852YMXAX-1.5/NOPB
LM2852YMXAX-1.8/NOPB
LM2852YMXAX-2.5/NOPB
LM2852YMXAX-3.0/NOPB
LM2852YMXAX-3.3/NOPB
ACTIVE
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
PWP
14
14
14
14
14
14
2500
Green (RoHS
& no Sb/Br)
CU SN
CU SN
CU SN
CU SN
CU SN
CU SN
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
2852Y
1.3
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
PWP
PWP
PWP
PWP
PWP
2500
2500
2500
2500
2500
Green (RoHS
& no Sb/Br)
-40 to 125
-40 to 125
-40 to 125
2852Y
-1.5
Green (RoHS
& no Sb/Br)
2852Y
-1.8
Green (RoHS
& no Sb/Br)
2852Y
-2.5
Green (RoHS
& no Sb/Br)
2852Y
3.0
Green (RoHS
& no Sb/Br)
-40 to 125
2852Y
-3.3
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
Addendum-Page 3
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 4
PACKAGE MATERIALS INFORMATION
www.ti.com
23-Sep-2013
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
LM2852XMXAX-0.8/NOP HTSSOP PWP
B
14
14
14
14
14
2500
2500
2500
2500
2500
330.0
330.0
330.0
330.0
330.0
12.4
12.4
12.4
12.4
12.4
6.95
6.95
6.95
6.95
6.95
8.3
8.3
8.3
8.3
8.3
1.6
1.6
1.6
1.6
1.6
8.0
8.0
8.0
8.0
8.0
12.0
12.0
12.0
12.0
12.0
Q1
Q1
Q1
Q1
Q1
LM2852XMXAX-1.0/NOP HTSSOP PWP
B
LM2852XMXAX-1.2/NOP HTSSOP PWP
B
LM2852XMXAX-1.5/NOP HTSSOP PWP
B
LM2852XMXAX-1.8/NOP HTSSOP PWP
B
LM2852XMXAX-2.5
HTSSOP PWP
14
14
2500
2500
330.0
330.0
12.4
12.4
6.95
6.95
8.3
8.3
1.6
1.6
8.0
8.0
12.0
12.0
Q1
Q1
LM2852XMXAX-2.5/NOP HTSSOP PWP
B
LM2852XMXAX-3.0/NOP HTSSOP PWP
B
14
14
14
14
2500
2500
2500
2500
330.0
330.0
330.0
330.0
12.4
12.4
12.4
12.4
6.95
6.95
6.95
6.95
8.3
8.3
8.3
8.3
1.6
1.6
1.6
1.6
8.0
8.0
8.0
8.0
12.0
12.0
12.0
12.0
Q1
Q1
Q1
Q1
LM2852XMXAX-3.3/NOP HTSSOP PWP
B
LM2852YMXAX-0.8/NOP HTSSOP PWP
B
LM2852YMXAX-1.0/NOP HTSSOP PWP
B
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
23-Sep-2013
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
LM2852YMXAX-1.2/NOP HTSSOP PWP
B
14
14
14
14
14
14
14
2500
2500
2500
2500
2500
2500
2500
330.0
330.0
330.0
330.0
330.0
330.0
330.0
12.4
12.4
12.4
12.4
12.4
12.4
12.4
6.95
6.95
6.95
6.95
6.95
6.95
6.95
8.3
8.3
8.3
8.3
8.3
8.3
8.3
1.6
1.6
1.6
1.6
1.6
1.6
1.6
8.0
8.0
8.0
8.0
8.0
8.0
8.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
Q1
Q1
Q1
Q1
Q1
Q1
Q1
LM2852YMXAX-1.3/NOP HTSSOP PWP
B
LM2852YMXAX-1.5/NOP HTSSOP PWP
B
LM2852YMXAX-1.8/NOP HTSSOP PWP
B
LM2852YMXAX-2.5/NOP HTSSOP PWP
B
LM2852YMXAX-3.0/NOP HTSSOP PWP
B
LM2852YMXAX-3.3/NOP HTSSOP PWP
B
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
LM2852XMXAX-0.8/NOPB
LM2852XMXAX-1.0/NOPB
LM2852XMXAX-1.2/NOPB
LM2852XMXAX-1.5/NOPB
LM2852XMXAX-1.8/NOPB
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
PWP
PWP
PWP
PWP
PWP
14
14
14
14
14
2500
2500
2500
2500
2500
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
35.0
35.0
35.0
35.0
35.0
Pack Materials-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
23-Sep-2013
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
LM2852XMXAX-2.5
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
HTSSOP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
PWP
14
14
14
14
14
14
14
14
14
14
14
14
14
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
LM2852XMXAX-2.5/NOPB
LM2852XMXAX-3.0/NOPB
LM2852XMXAX-3.3/NOPB
LM2852YMXAX-0.8/NOPB
LM2852YMXAX-1.0/NOPB
LM2852YMXAX-1.2/NOPB
LM2852YMXAX-1.3/NOPB
LM2852YMXAX-1.5/NOPB
LM2852YMXAX-1.8/NOPB
LM2852YMXAX-2.5/NOPB
LM2852YMXAX-3.0/NOPB
LM2852YMXAX-3.3/NOPB
Pack Materials-Page 3
MECHANICAL DATA
PWP0014A
MXA14A (Rev A)
www.ti.com
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