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Table of Contents
User’s Guide
TPS54395 Step-Down Converter Evaluation Module User's
Guide
ABSTRACT
This user's guide contains information for the TPS54395EVM-057 evaluation module as well as for the
TPS54395. Included are the performance specifications, schematic, and the bill of materials of the TPS54395
EVM.
Table of Contents
1 Introduction.............................................................................................................................................................................3
2 Performance Specification Summary................................................................................................................................... 4
3 Modifications...........................................................................................................................................................................5
3.1 Output Voltage Setpoint..................................................................................................................................................... 5
3.2 Output Filter and Closed-Loop Response..........................................................................................................................5
4 Test Setup and Results.......................................................................................................................................................... 6
4.1 Input/Output Connections.................................................................................................................................................. 6
4.2 Start-Up Procedure............................................................................................................................................................ 6
4.3 Efficiency............................................................................................................................................................................7
4.4 Load Regulation................................................................................................................................................................. 9
4.5 Line Regulation................................................................................................................................................................ 10
4.6 Load Transient Response................................................................................................................................................ 11
4.7 Output Voltage Ripple...................................................................................................................................................... 12
4.8 Input Voltage Ripple......................................................................................................................................................... 14
4.9 Start-Up............................................................................................................................................................................15
5 Board Layout.........................................................................................................................................................................17
5.1 Layout.............................................................................................................................................................................. 17
6 Schematic, Bill of Materials, and Reference...................................................................................................................... 21
6.1 Schematic........................................................................................................................................................................ 21
6.2 Bill of Materials.................................................................................................................................................................22
6.3 Reference.........................................................................................................................................................................22
7 Revision History................................................................................................................................................................... 22
List of Figures
Figure 4-1. TPS54395EVM Converter 1 Efficiency......................................................................................................................7
Figure 4-2. TPS54395EVM Converter 1 Light Load Efficiency....................................................................................................7
Figure 4-3. TPS54395EVM Converter 2 Efficiency......................................................................................................................8
Figure 4-4. TPS54395EVM Converter 2 Light Load Efficiency....................................................................................................8
Figure 4-5. TPS54395EVM Converter 1 Load Regulation...........................................................................................................9
Figure 4-6. TPS54395EVM Converter 2 Load Regulation...........................................................................................................9
Figure 4-7. TPS54395EVM Converter 1 Line Regulation..........................................................................................................10
Figure 4-8. TPS54395EVM Converter 2 Line Regulation..........................................................................................................10
Figure 4-9. TPS54395EVM Converter 1 Load Transient Response.......................................................................................... 11
Figure 4-10. TPS54395EVM Converter 2 Load Transient Response........................................................................................ 11
Figure 4-11. TPS54395EVM Converter 1 Output Voltage Ripple.............................................................................................. 12
Figure 4-12. TPS54395EVM Converter 1 Eco-mode Output Voltage Ripple at No Load..........................................................12
Figure 4-13. TPS54395EVM Converter 2 Output Voltage Ripple..............................................................................................13
Figure 4-14. TPS54395EVM Converter 2 Eco-mode Output Voltage Ripple at No Load..........................................................13
Figure 4-15. TPS54395EVM Input Voltage Ripple.................................................................................................................... 14
Figure 4-16. TPS54395EVM Converter 1 Start-Up Relative to VIN .......................................................................................... 15
Figure 4-17. TPS54395EVM Start-Up Relative to EN1............................................................................................................. 15
Figure 4-18. TPS54395EVM Converter 2 Start-Up Relative to VIN .......................................................................................... 16
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Trademarks
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Figure 4-19. TPS54395EVM Start-Up Relative to EN2............................................................................................................. 16
Figure 5-1. Top Assembly.......................................................................................................................................................... 17
Figure 5-2. Top Layer.................................................................................................................................................................18
Figure 5-3. Internal 1 Layer....................................................................................................................................................... 18
Figure 5-4. Internal 2 Layer....................................................................................................................................................... 19
Figure 5-5. Bottom Layer........................................................................................................................................................... 19
Figure 5-6. Bottom Assembly.................................................................................................................................................... 20
Figure 6-1. TPS54395EVM Schematic Diagram....................................................................................................................... 21
List of Tables
Table 1-1. Input Voltage, Output Voltage and Output Current Summary..................................................................................... 3
Table 2-1. TPS54395EVM Performance Specifications Summary.............................................................................................. 4
Table 3-1. Output Voltages.......................................................................................................................................................... 5
Table 4-1. Connection and Test Points........................................................................................................................................ 6
Table 6-1. Bill of Materials..........................................................................................................................................................22
Trademarks
SWIFT™, D-CAP2™, and Eco-mode™ are trademarks of Texas Instruments.
All trademarks are the property of their respective owners.
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Introduction
1 Introduction
The TPS54395 is a dual, adaptive on-time, D-CAP2™-mode, synchronous buck converter requiring a low
external component count. The D-CAP2 control circuit is optimized for low-ESR output capacitors such as
POSCAP, SP-CAP, or ceramic types and features fast transient response with no external compensation. The
switching frequency is internally set at a nominal of 700 kHz. The high-side and low-side switching MOSFETs
are incorporated inside the TPS54395 package along with the gate drive circuitry. The low drain-to-source
on-resistance of the MOSFETs allows the TPS54395 to achieve high efficiencies and helps keep the junction
temperature low at high-output currents. The TPS54395 also features auto-skip Eco-mode™ operation for
improved light-load efficiency. The TPS54395 dual DC/DC synchronous converter is designed to provide up
to 3-A output on CH1 and CH2 from an input voltage source of 4.5 V to 18 V. The output voltage range is from
0.76 V to 7 V. Rated input voltage and output current range for the evaluation module are given in Table 1-1.
The TPS54395 EVM evaluation module is a dual, synchronous buck converter providing 3.3 V at 3 A on CH1
and 1.5 V at 3 A on CH2 from 5 V to 18 V input. This user’s guide describes the TPS54395 EVM performance.
Note
Throughout the document, x means 1 or 2, for example, VFBx means VFB1 or VFB2.
Table 1-1. Input Voltage, Output Voltage and Output Current Summary
TPS54395EVM
INPUT VOLTAGE RANGE
OUTPUT VOLTAGE
OUTPUT CURRENT RANGE
CH1
VIN1 = 6 V to 18 V
3.3 V
0 A to 3 A
CH2
VIN2 = 5 V to 18 V
1.5 V
0 A to 3 A
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Performance Specification Summary
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2 Performance Specification Summary
A summary of the TPS54395EVM performance specifications is provided in Table 2-1. Specifications are given
for an input voltage of VINx = 12 V and an output voltage of 3.3 V and 1.5 V, unless otherwise noted. The
ambient temperature is 25°C for all measurement, unless otherwise noted.
Table 2-1. TPS54395EVM Performance Specifications Summary
SPECIFICATIONS
TEST CONDITIONS
Input voltage range (VINx)
Output
voltages
TYP
MAX
12
18
VOUT1
3.3
VOUT2
1.5
Operating frequency
VIN1, VIN2 = 12 V, IOUT1, IOUT2 = 1.5 A
CH1
V
kHz
3
0
UNIT
V
700
0
Output
current range CH2
4
MIN
See Table 1-1
A
3
Line regulation, VOUT1
IOUT1 = 1.5 A, IOUT2 = 0 A ,VIN1, VIN2 =
6 V to 18 V
+0.3 , –0.5%
Line regulation, VOUT2
IOUT1 = 1.5 A, IOUT2 = 0 A ,VIN1, VIN2 =
6 V to 18 V
+0.2, –0.4%
Load regulation, VOUT1
VIN1, VIN2 = 12 V, IOUT1 = 0 A to 3 A
+0.5, –0.1%
Load regulation, VOUT2
VIN1, VIN2 = 12 V, IOUT2 = 0 A to 3 A
+0.55, –
0.05%
Over current limit, VOUT1
VIN1 = 12 V, L1 = 2.2 µH
3.5
4.7
6.5
Over current limit, VOUT2
VIN2 = 12 V, L1 = 2.2 µH
3.5
4.7
6.5
Output ripple voltage, VOUT1
VIN1 = 12 V, IOUT1 = 3 A
Output ripple voltage, VOUT2
Maximum efficiency, VOUT1
Maximum efficiency, VOUT2
A
A
20
mVPP
VIN2 = 12 V, IOUT2 = 3 A
40
mVPP
VIN1 = 6 V, IOUT1= 0.7 A
94.8%
VIN2 = 5 V, IOUT2= 0.7 A
90.5%
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Modifications
3 Modifications
This evaluation module is designed to provide access to the features of the TPS54395. Some modifications can
be made to this module.
3.1 Output Voltage Setpoint
To change the output voltages of the EVM, change the value of the top resistor of the feedback divider, R1 or R3.
Please refer to the top assembly in Figure 5-1 to locate the resistors close to the output connectors. Changing
the value of R1 or R3 can change the output voltage above 0.765 V. The value of R1 or R3 for a specific output
voltage can be calculated using Equation 1.
For output voltage from 0.76 V to 7 V:
æ R1 ö
æ R3 ö
VOUT1 = 0.765 V ´ ç 1+
÷ ; VOUT2 = 0.765 V ´ ç 1+ R4 ÷
R2
è
ø
è
ø
(1)
Table 3-1 lists the R1 or R3 values for some common output voltages. For output voltages of 1.8 V or above, a
feedforward capacitor (C21 or C20) can be required to improve the phase margin. Pads for this component (C21
or C20) are provided on the printed-circuit board. Note that the resistor values given in Table 3-1 are standard
values and not the exact values calculated using Equation 1.
Table 3-1. Output Voltages
L1, L2
(µH)
C14, C15, C18 TOTAL CAPACITANCE,
C16, C17, C19 TOTAL CAPACITANCE
(µF)
22.1
1.5 – 2.2
22 – 68
8.25
22.1
1.5 – 2.2
22 – 68
12.7
22.1
1.5 – 2.2
22 – 68
1.5
21.5
22.1
1.5 – 2.2
22 – 68
1.8
30.1
22.1
5 – 22
2.2 – 3.3
22 – 68
2.5
49.9
22.1
5 – 22
2.2 – 3.3
22 – 68
3.3
73.2
22.1
5 – 22
2.2 – 3.3
22 – 68
5
124
22.1
5 – 22
4.7
22 – 68
6.5
165
22.1
5 – 22
4.7
22 – 68
OUTPUT VOLTAGE
(V)
R1, R3
(kΩ)
R2, R4
(kΩ)
1
6.81
1.05
1.2
C21, C20
(pF)
3.2 Output Filter and Closed-Loop Response
The TPS54395 relies on the output filter characteristics to ensure stability of the control loop. The recommended
output filter components for common output voltages are given in Table 3-1. It is possible for other output filter
component values to provide acceptable closed-loop characteristics. R11 and R12 are provided for convenience
in breaking the control loop and measuring the closed-loop response.
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Test Setup and Results
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4 Test Setup and Results
This section describes how to properly connect, set up, and use the TPS54395EVM. The section also includes
test results typical for the following:
•
•
•
•
•
•
•
•
Evaluation modules and efficiency
Output load regulation
Output line regulation
Load transient response
Output voltage ripple
Input voltage ripple
Start-up
Switching frequency
4.1 Input/Output Connections
The TPS54395EVM is provided with input/output connectors and test points as shown in Table 4-1. A power
supply capable of supplying 4 A must be connected to J1 through a pair of 20 AWG wires. The loads must be
connected to J3 and/or J2 through a pair of 20 AWG wires. The maximum load current capability is two times
2 A. Wire lengths must be minimized to reduce losses in the wires. Test point TP1 provides a place to monitor
the input voltage (VIN) with TP7 providing a convenient ground reference. TP4 and TP3 are used to monitor the
output voltages with TP5 and TP6 as the ground references.
Table 4-1. Connection and Test Points
REFERENCE DESIGNATOR
FUNCTION
J1
VIN (see Table 1-1 for VIN range)
J2
VOUT2, 1.5 V at 3-A maximum
J3
VOUT1, 3.3 V at 3-A maximum
J4
EN1 control. Connect EN1 to off to disable converter 1; connect EN1 onto enable converter 1.
J5
EN2 control. Connect EN2 to off to disable converter 2; connect EN2 onto enable converter 2.
JP1
Jumper to give the possibility to use another input voltage for converter 2
TP1
VIN test point at VIN connector
TP2
VIN2 test point after JP1
TP3
Output voltage test point for converter 2
TP4
Output voltage test point for converter 1
TP5, TP6, TP7
Ground test points at input and output connectors
TP8
EN2 test point
TP9
EN1 test point
TP10
Switch node test point of converter 1
TP11
Switch node test point of converter 2
TP12
VREG5 test point
TP13
PG1 test point
TP14
PG2 test point
TP15
Analog ground test point
4.2 Start-Up Procedure
1. Ensure that the jumper at J4 and/or J5 (Enable control) are set from ENx to off.
2. Apply appropriate VIN voltage to VIN and PGND terminals at J1.
3. Move the jumper at J4 and/or J5 (Enable control) to cover ENx and on. The EVM enables the according
output voltage.
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Test Setup and Results
4.3 Efficiency
4.3.1 Efficiency of Converter 1
Figure 4-1 shows the efficiency for the converter 1 on the TPS54395EVM at an ambient temperature of 25°C.
100
90
80
Efficiency (%)
70
60
50
40
30
20
VIN = 6 V
VIN = 12 V
VIN = 18 V
10
0
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
Output Current (A)
2.00
2.25
2.50
2.75
3.00
G001
Figure 4-1. TPS54395EVM Converter 1 Efficiency
Figure 4-2 shows the light load efficiency for converter 1 on the TPS54395EVM at an ambient temperature of
25°C.
100
90
80
Efficiency (%)
70
60
50
40
30
20
VIN = 6 V
VIN = 12 V
VIN = 18 V
10
0
0.001
0.01
0.1
Output Current (A)
1
10
G002
Figure 4-2. TPS54395EVM Converter 1 Light Load Efficiency
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4.3.2 Efficiency of Converter 2
Figure 4-3 shows the efficiency for the converter 2 on the TPS54395EVM at an ambient temperature of 25°C.
100
90
80
Efficiency (%)
70
60
50
40
30
20
VIN = 5 V
VIN = 12 V
VIN = 18 V
10
0
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
Output Current (A)
2.00
2.25
2.50
2.75
3.00
G005
Figure 4-3. TPS54395EVM Converter 2 Efficiency
Figure 4-4 shows the light load efficiency for the converter 2 on the TPS54395EVM at an ambient temperature of
25°C.
100
90
80
Efficiency (%)
70
60
50
40
30
20
VIN = 5 V
VIN = 12 V
VIN = 18 V
10
0
0.001
0.01
0.1
Output Current (A)
1
10
G006
Figure 4-4. TPS54395EVM Converter 2 Light Load Efficiency
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Test Setup and Results
4.4 Load Regulation
4.4.1 Load Regulation of Converter 1
The load regulation for the converter 1 on the TPS54395EVM is shown in Figure 4-5. On the EVM, the load
regulation of converter 1 is independent on the load of converter 2.
1.2
VIN = 6 V
VIN = 12 V
1
Output Voltage Deviation (%)
0.8
0.6
0.4
0.2
0
−0.2
−0.4
−0.6
−0.8
−1
−1.2
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
Output Current (A)
2.00
2.25
2.50
2.75
3.00
G004
Figure 4-5. TPS54395EVM Converter 1 Load Regulation
4.4.2 Load Regulation of Converter 2
The load regulation for the converter 2 on the TPS54395EVM is shown in Figure 4-6. For 5V input voltage, the
converter 2 shows on the EVM some dependency on the load of converter 1.
1.2
VIN = 5 V
VIN = 12 V
1
Output Voltage Deviation (%)
0.8
0.6
0.4
0.2
0
−0.2
−0.4
−0.6
−0.8
−1
−1.2
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
Output Current (A)
2.00
2.25
2.50
2.75
3.00
G008
Figure 4-6. TPS54395EVM Converter 2 Load Regulation
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4.5 Line Regulation
4.5.1 Line Regulation Converter 1
The line regulation of converter 1 on the TPS54395EVM is shown in Figure 4-7.
1
0.8
Output Voltage Deviation (%)
0.6
0.4
0.2
0
−0.2
−0.4
−0.6
−0.8
IOUT = 1.5 A
−1
6.0
7.5
9.0
10.5
12.0
Input Voltage (V)
13.5
15.0
16.5
18.0
G003
Figure 4-7. TPS54395EVM Converter 1 Line Regulation
4.5.2 Line Regulation Converter 2
The line regulation of converter 2 on the TPS54395EVM is shown in Figure 4-8.
1
0.8
Output Voltage Deviation (%)
0.6
0.4
0.2
0
−0.2
−0.4
−0.6
−0.8
IOUT = 1.5 A
−1
4.5
6.0
7.5
9.0
10.5
12.0
Input Voltage (V)
13.5
15.0
16.5
18.0
G007
Figure 4-8. TPS54395EVM Converter 2 Line Regulation
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Test Setup and Results
4.6 Load Transient Response
4.6.1 Load Transient Response Converter 1
The response of converter 1 on the TPS54395EVM to a load transient is shown in Figure 4-9.
VOUT1 = 50 mV/div (ac coupled)
Load Current = 1 A/div
Load step = 0.75 A to 2.25 A
Slew rate = 500 mA/µsec
Time = 100 µs/div
Figure 4-9. TPS54395EVM Converter 1 Load Transient Response
4.6.2 Load Transient Response Converter 2
The response of converter 2 on the TPS54395EVM to a load transient is shown in Figure 4-10.
VOUT2 = 50 mV/div (ac coupled)
Load Current = 1 A/div
Load step = 0.75 A to 2.25 A
Slew rate = 500 mA/µsec
Time = 100 µs/div
Figure 4-10. TPS54395EVM Converter 2 Load Transient Response
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4.7 Output Voltage Ripple
4.7.1 Output Voltage Ripple Converter 1
The output voltage ripple of converter 1 on the TPS54395EVM is shown in Figure 4-11. The output current is the
rated full load of 3 A.
VOUT1 = 50 mV/div (ac coupled)
SW1 = 5 V/div
Time = 1 µs/div
Figure 4-11. TPS54395EVM Converter 1 Output Voltage Ripple
The output voltage ripple of converter 1 on the TPS54395EVM during Eco-mode operation at no load is shown in
Figure 4-12.
VOUT1 = 50 mV/div (ac coupled)
SW1 = 5 V/div
Time = 10 ms/div
Figure 4-12. TPS54395EVM Converter 1 Eco-mode Output Voltage Ripple at No Load
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Test Setup and Results
4.7.2 Output Voltage Ripple Converter 2
The output voltage ripple of converter 2 on the TPS54395EVM is shown in Figure 4-13. The output current is the
rated full load of 3 A.
VOUT2 = 50 mV/div (ac coupled)
SW2 = 5 V/div
Time = 1 µs/div
Figure 4-13. TPS54395EVM Converter 2 Output Voltage Ripple
The output voltage ripple of converter 2 on the TPS54395EVM during Eco-mode operation at no load is shown in
Figure 4-14.
VOUT2 = 50 mV/div (ac coupled)
SW2 = 5 V/div
Time = 10 ms/div
Figure 4-14. TPS54395EVM Converter 2 Eco-mode Output Voltage Ripple at No Load
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4.8 Input Voltage Ripple
The TPS54395EVM input voltage ripple is shown in Figure 4-15. The output currents are the rated full load
currents of 3 A each channel.
VIN = 100 mV/div (ac coupled)
SW1 = 10 V/div
SW2 = 10 V/div
Time = 1 µs/div
Figure 4-15. TPS54395EVM Input Voltage Ripple
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Test Setup and Results
4.9 Start-Up
4.9.1 Converter 1 Start-Up
The TPS54395EVM start-up waveform of converter 1 relative to VIN is shown in Figure 4-16.
VIN = 10 V/div
EN1 = 10 V/div
SS1 = 5 V/div
VOUT1 = 2 V/div
Time = 2 ms/div
Figure 4-16. TPS54395EVM Converter 1 Start-Up Relative to VIN
The TPS54395EVM start-up waveform of converter 1 relative to EN1 is shown in Figure 4-17.
VIN = 10 V/div
EN1 = 10 V/div
SS1 = 5 V/div
VOUT1 = 2 V/div
Time = 2 ms/div
Figure 4-17. TPS54395EVM Start-Up Relative to EN1
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4.9.2 Converter 2 Start-Up
The TPS54395EVM start-up waveform of converter 2 relative to VIN is shown in Figure 4-18.
VIN = 10 V/div
EN2 = 10 V/div
SS2 = 5 V/div
VOUT2 = 2 V/div
Time = 2 ms/div
Figure 4-18. TPS54395EVM Converter 2 Start-Up Relative to VIN
The TPS54395EVM start-up waveform of converter 2 relative to EN2 is shown in Figure 4-19.
VIN = 10 V/div
EN2 = 10 V/div
SS2 = 5 V/div
VOUT2 = 2 V/div
Time = 2 ms/div
Figure 4-19. TPS54395EVM Start-Up Relative to EN2
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Board Layout
5 Board Layout
This section provides a description of the TPS54395EVM, board layout, and layer illustrations.
5.1 Layout
The board layout for the TPS54395EVM is shown in Figure 5-1 through Figure 5-6. The top layer contains the
main power traces for VIN and VOUTx. Also on the top layer are connections for the pins of the TPS54395 and
a large area filled with ground. Many of the signal traces also are located on the top side. The input decoupling
capacitors are located as close to the IC as possible. The input and output connectors, test points, and all of the
assembled components are located on the top side. An analog ground (GND) area is provided on the top side.
Analog ground (GND) and power ground (PGND) are connected at a single point on the top layer near the IC.
The other layers are primarily power ground but the bottom layer has some traces to connect the test points for
SSx and ENx.
Figure 5-1. Top Assembly
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Board Layout
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Figure 5-2. Top Layer
Figure 5-3. Internal 1 Layer
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Board Layout
Figure 5-4. Internal 2 Layer
Figure 5-5. Bottom Layer
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Figure 5-6. Bottom Assembly
20
TPS54395 Step-Down Converter Evaluation Module User's Guide
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Schematic, Bill of Materials, and Reference
6 Schematic, Bill of Materials, and Reference
6.1 Schematic
Figure 6-1 is the schematic for the TPS54395EVM.
L2
1.5uH
TP3
2
C13
1
J5
TP11
VIN2
R10
EN2
TP8
22uF
10
9
C11
1uF
17
GND
TP15
C21 1
8
7
VFB1
PWPD
VFB2
EN2
EN1
VREG5
VREG5
12
13
14
SW2
SW1
PGND1
5
2
1
VIN1
VIN
3
2
4
1
VBST1
TP1
J1
PGND2
16
15
0.1uF
VIN2
C6
10uF
VBST2
C5
10uF
R3
21.5k
TP12
R4
22.1k
U1
TPS54395PWP
C4
C20 1
VREG5
EN2
R6
0
JP1
J2
R12
0
1
0.01uF TP14
VIN2
TP2
VOUT2 1.5V, 3A
GND
1
1
R7
C10
C8
TP7
22uF
TP6
1
0.1uF
VIN 5V to 18V
GND
C19
1
11
R14
10.0k
3
SS2
2
SS1
on
EN2
off
C17
D2
6
1
C16
R2 22.1k
C1
C2
C3
10uF
10uF
0.1uF
R5
0
EN1
C7
0.1uF
VREG5
C9
TP13
0.01uF
R1
73.2k
R8
R11
0
1
TP4
J3
TP10
J4
L1
2.2uH
C12
1
on
EN1
off
1
VIN
2
3
1
EN1
R13
10.0k
C15
22uF
22uF
C18
TP5
2
VOUT1 3.3V, 3A
GND
1
D1
R9
TP9
C14
1
1
1
Parts without Value are Not Installed
Figure 6-1. TPS54395EVM Schematic Diagram
SLVU703A – AUGUST 2012 – REVISED SEPTEMBER 2021
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21
Schematic, Bill of Materials, and Reference
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6.2 Bill of Materials
Table 6-1. Bill of Materials
Count RefDes
Value
Description
Size
Part Number
Manufacturer
1
C11
1 µF
Capacitor, ceramic, 16 V, X7R, 10%
0603
GRM188R71C105KA12
Murata
4
C1-2 C4-5
10 µF
Capacitor, ceramic, 25 V, X7R, 10%
1206
GRM31CR71E106KA12
Murata
0
C12-13
open
Capacitor, ceramic, 50 V, X7R, 10%
0603
GRM188R71H104KA93
Murata
4
C14-17
22 µF
Capacitor, ceramic, 6.3 V, X7R, 10%
1206
GRM31CR70J226KE19
Murata
0
C18-19
open
Capacitor, ceramic, 6.3 V, X7R, 10%
1206
0
C20-21
open
Capacitor, ceramic, 50 V, X7R, 10%
0603
Std
Std
4
C3 C6-8
0.1 µF
Capacitor, ceramic, 50 V, X7R, 10%
00603
GRM188R71H104KA93
Murata
2
C9-10
0.01 µF
Capacitor, ceramic, 50 V, X7R, 10%
0603
Std
Std
0
D1-2
open
Diode, Schottky
SMA
STD
STD
1
L1
2.2 µH
Inductor, power line, magnetic shielded,
±30%, 4.3 A
6.9 × 7.2
mm
SPM6530-2R2M
TDK
1
L2
1.5 µH
Inductor, power line, magnetic shielded,
±30%, 4.1 A
6.9 × 7.2
mm
SPM6530-1R5M
TDK
1
R1
73.2 kΩ
Resistor, chip, 1/16W, 1%
0603
STD
STD
2
R11-12
0Ω
Resistor, chip, 1/16W, 5%
0603
STD
STD
2
R13-14
10.0 kΩ
Resistor, chip, 1/16W, 1%
0603
STD
STD
2
R2 R4
22.1 kΩ
Resistor, chip, 1/16W, 1%
0603
STD
STD
1
R3
21.5 kΩ
Resistor, chip, 1/16W, 1%
0603
STD
STD
2
R5-6
0Ω
Resistor, chip, 1/16W, 1%
0603
STD
STD
0
R7-8
open
Resistor, chip, 1/16W, 1%
0603
STD
STD
0
R9-10
open
Resistor, chip, 1/16W, 1%
0603
STD
STD
1
U1
TPS54395PW
P
IC, 3A/3A, dual output fully synchronous
buck converter with integrated FET
TSSOP
TPS54395PWP
TI
C14-C19 must be replaced with capacitors which have a higher voltage rating when the output voltage is set
above 4V.
6.3 Reference
1. Texas Instruments, TPS54395, 3-A Dual Channel Synchronous Step-Down Switcher With Integrated FETs
7 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision * (August 2012) to Revision A (September 2021)
Page
• Updated the numbering format for tables, figures, and cross-references throughout the document. ................3
• Updated the user's guide title ............................................................................................................................ 3
• Edited the user's guide for clarity........................................................................................................................3
22
TPS54395 Step-Down Converter Evaluation Module User's Guide
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