Texas Instruments TPS7A54EVM-031 User manual

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TPS7A54EVM-031 Evaluation Module
User's Guide
SBVU056–December 2019
TPS7A54EVM-031 Evaluation Module
This user’s guide describes the operational use of the TPS7A54EVM-031 evaluation module (EVM) as a
reference design for engineering demonstration and evaluation of the TPS7A54EVM-031, low-dropout
linear regulator (LDO). Included in this user’s guide are setup and operating instructions, thermal and
layout guidelines, a printed-circuit board (PCB) layout, a schematic diagram, and a bill of materials (BOM).
Throughout this document, the terms demonstration kit,evaluation board,EVM, and evaluation module
are synonymous with the TPS7A54EVM-031.
The following related documents are available through the Texas Instruments web site at www.ti.com.
Table 1. Related Documentation
Device Literature Number
TPS7A54-Q1 SBVS312

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TPS7A54EVM-031 Evaluation Module
Contents
1 Introduction ................................................................................................................... 3
1.1 Before You Begin................................................................................................... 3
2 EVM Setup.................................................................................................................... 4
2.1 Input/Output Connectors and Jumper Descriptions............................................................ 4
2.2 Soldering Guidelines ............................................................................................... 5
2.3 Equipment Connection............................................................................................. 5
3 Operation ..................................................................................................................... 6
4 PCB Layout................................................................................................................... 6
5 Schematic..................................................................................................................... 8
6 Bill of Materials............................................................................................................... 9
List of Figures
1 Top Composite View ........................................................................................................ 6
2 Top Layer Routing........................................................................................................... 6
3 Mid Layer 1 Routing......................................................................................................... 6
4 Mid Layer 2 Routing......................................................................................................... 6
5 Bottom Layer Routing....................................................................................................... 6
6 TPS7A54EVM-031 Schematic............................................................................................. 8
List of Tables
1 Related Documentation..................................................................................................... 1
2 TPS7A54EVM-031 BOM.................................................................................................... 9
Trademarks
All trademarks are the property of their respective owners.

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TPS7A54EVM-031 Evaluation Module
1 Introduction
Texas Instruments' TPS7A54EVM-031 EVM helps design engineers evaluate the operation and
performance of the TPS7A5401RPS device for possible use in a circuit application. This particular EVM
configuration contains a single low-noise, high-PSRR linear regulator for radar applications. The regulator
is capable of delivering up to 4 A to the load with ultra-low VIN to VOUT dropout voltage. For stability, use
a 47-µF (or larger) output capacitor for the TPS7A54EVM-031.
1.1 Before You Begin
The following warnings and cautions are noted for the safety of anyone using or working close to the
TPS7A54EVM-031. Observe all safety precautions.
Warning Warning Hot surface. Contact may cause burns. Do not touch.
CAUTION
The circuit module may be damaged by overtemperature. To avoid damage,
monitor the temperature during evaluation and provide cooling, as needed, for
your system environment.
CAUTION
Some power supplies can be damaged by application of external voltages. If
using more than one power supply, check your equipment requirements and
use blocking diodes or other isolation techniques, as needed, to prevent
damage to your equipment.
CAUTION
The circuit module is not a finished product or electrical appliance. The module
does not contain current or voltage thresholds for circuit protection. It must be
used by qualified personnel with additional equipment for evaluation only.

EVM Setup www.ti.com
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2 EVM Setup
This section describes how to properly connect and set up the TPS7A54EVM-031, including the jumpers
and connectors on the EVM board.
2.1 Input/Output Connectors and Jumper Descriptions
2.1.1 J1 – VIN
Input power-supply voltage SMA jack connector.
2.1.2 J2 – VIN
Input power-supply voltage standard banana jack connector. Twist together the positive input lead and
ground return lead from the input power supply, and keep them as short as possible to minimize input
inductance. Add additional bulk capacitance between the input supply and ground (use the C1 footprint) if
the supply leads are greater than six inches. For example, an additional 47-µF electrolytic capacitor
connected from the input supply (J1) to ground can improve the transient response of the
TPS7A5401RPS, and eliminates unwanted ringing on the input because of long wire connections.
2.1.3 J3 – EN
Output enable. To enable the output, connect a jumper to short VIN to EN.
2.1.4 J4 – VOUT
Output voltage SMA jack connector.
2.1.5 J5 – PG
Pullup-voltage selector for PG. This EVM is designed so that PG can be pulled up either to VOUT by
shorting J5, or pulled up to another voltage by applying an external voltage to the PG post.
2.1.6 J6 – VOUT
Output voltage standard banana jack connector.
2.1.7 J7 – BIAS
Bias voltage standard banana connector.
If the input supply (VIN) voltage is less than 1.4 V but greater than 1.1 V, use a bias voltage of 3.0 V to
6.5 V to provide power to the TPS7A5401RPS. If the input voltage is greater than 1.4 V, the BIAS pin
does not have to be connected. The BIAS supply pin typically consumes 2.3 mA.
2.1.8 J8 – GND
Input and Bias ground return connector.
2.1.9 J9 – GND
Output ground return connector.
2.1.10 J10 -- GND
Inout and Bias ground return connector.
2.1.11 J11
6 × 1 header, can be used as test points for LDO inputs and outputs.

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2.1.12 J12
6 × 1 header, can be used as test points for LDO inputs and outputs.
2.1.13 TP1 – VIN
Input test point.
2.1.14 TP2 – VEN
Input sense test point.
2.1.15 TP3 – PG
PG test point.
2.1.16 TP4 – VOUT
Enable test point.
2.1.17 TP5 – VBIAS
Output test point.
2.1.18 TP6 – GND
Ground sense test point near input.
2.1.19 TP7 – GND
Ground sense test point near output.
2.1.20 TP8 – GND
Ground sense test point near Bias.
2.1.21 TP9 – GND
Ground sense test point.
2.2 Soldering Guidelines
To avoid damaging the integrated circuit (IC), use a hot-air system for any solder rework to modify the
EVM for the purpose of repair or other application reasons.
2.3 Equipment Connection
Use the following steps when connecting the equipment:
1. Set the input and bias power supplies to 6.5 V (maximum), and turn the power supplies off.
2. Connect the positive voltage lead from the input power supply to VIN at the J1 or J2 connector of the
EVM.
3. Connect the ground lead from the input power supply to GND at the J8 connector of the EVM.
4. Connect a 0-A to 4-A load between OUT and GND. The connector used depends on the desired
output current.
5. Disable the output by floating J3.

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3 Operation
Use the following steps to operate the equipment:
1. Turn on the power supplies.
2. Enable the output by jumping J3 (the EN pin) to VIN.
3. Vary the respective load and input voltage as necessary for test purposes.
4 PCB Layout
Figure 1 to Figure 5 illustrate the PCB layout for this EVM.
Figure 1. Top Composite View Figure 2. Top Layer Routing

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Figure 3. Mid Layer 1 Routing Figure 4. Mid Layer 2 Routing
Figure 5. Bottom Layer Routing

J2
VIN
J6
OUT
Vout =3.3 V
Iout Up to 200 mA
1
2
J3
GND
GND
GND
GND
GND
TP9
TP7TP6
TP8
TP1
TP3
TP4
TP2
1
2
J5
61000218321
10.0k
R1
10nF
C10
GND
47µF
C2
10µF
C3
DNP
10µF
C5
DNP
10µF
C6
DNP
47µF
C7
GND
10uF
16V
C11
DNP
TP5
10µF
C4
DNP
J9
GND
J8
GND
68µF
C8
DNP
68µF
C1
DNP
J10
GND
1.1 V to 6.5 V
3.0 V to 6.5 V
10.0k
R2
GND
BIAS BIAS
GND
PG
PG
GND
3.74k
R4
11.8k
R3
GND
BIAS 5
EN
3FB 9
GND 6
GND 7
GND 12
IN
1
IN
2
NR/SS
4
OUT 10
OUT 11
PG
8
TPS7A5401RPST
U1
VIN
VOUT
EN
FB
1
2
J1
DNP
1
2
J4
DNP
5
4
1
2
3
6
J11
DNP
5
4
1
2
3
6
J12
DNP
VIN
VIN
EN
NR
BIAS
GND GND
PG
FB
VOUT
VOUT
GND
NR
J7
BIAS
10nF
C9
Schematic www.ti.com
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5 Schematic
Figure 6 is the schematic for this EVM.
Figure 6. TPS7A54EVM-031 Schematic

www.ti.com Bill of Materials
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6 Bill of Materials
Table 2 shows the TPS7A54EVM-031 BOM.
(1) These assemblies are ESD sensitive, observe ESD precautions.
(2) These assemblies must be clean and free from flux and all contaminants. Use of no-clean flux is not acceptable.
(3) These assemblies must comply with workmanship standards IPC-A-610 Class 2.
(4) Unless otherwise noted in the Alternate Part Number or Alternate Manufacturer columns, all parts may be substituted with equivalents.
Table 2. TPS7A54EVM-031 BOM(1)(2)(3)(4)
Designator QTY Value Description Package Reference Part Number Manufacturer Alternate Part
Number Alternate Manufacturer
!PCB1 1 Printed Circuit Board LP031 Any
C2, C7 2 47 µF CAP, CERM, 47 µF, 10 V, ±20%, X5R, 0805 0805 GRM21BR61A476ME15 MuRata
C9 1 0.01 µF 'CAP, CERM, 0.01 µF, 100 V, ±10%, X7R, 0603 0603 C0603C103K1RACTU Kemet
C10 1 0.01 µF CAP, CERM, 0.01 uF, 50 V, ±5%, X7R, 0805 0805 08055C103JAT2A AVX
J2, J6, J7 3 Standard Banana Jack, Insulated, Red 6091 6091 Keystone
J3, J5 2 Header, 2.54 mm, 2×1, Gold, SMT Header, 2.54 mm, 2×1, SMT 61000218321 Wurth Elektronik
J8, J9, J10 3 Standard Banana Jack, Insulated, Black 6092 6092 Keystone
LBL1 1 Thermal Transfer Printable Labels, 0.650" W × 0.200" H
- 10,000 per roll PCB Label 0.650 × 0.200 in THT-14-423-10 Brady
R1, R2 2 10.0 kΩRES, 10.0 kΩ, 1%, 0.1 W, 0603 0603 CRCW060310K0FKEA Vishay-Dale
R3 1 11.8 kΩRES, 11.8 kΩ, 1%, 0.1 W, 0603 0603 CRCW060311K8FKEA Vishay-Dale
R4 1 3.74 kΩRES, 3.74 kΩ, 1%, 0.1 W, 0603 0603 CRCW06033K74FKEA Vishay-Dale
SH-J1 1 1×2 Shunt, 100 mil, Gold plated, Black Shunt 969102-0000-DA 3M SNT-100-BK-G Samtec
TP1, TP2, TP3,
TP4, TP5, TP6,
TP7, TP8, TP9 9 SMT Test Point, Compact, SMT Testpoint_Keystone_Compact 5016 Keystone
U1 1 Automotive-Grade 4-A, High-Accuracy, Low-Noise, LDO
Voltage Regulator, RGR0020A (VQFN-20) RGR0020A TPS7A5401RPS Texas Instruments
C1, C8 0 68 µF CAP, TA, 68 µF, 16 V, ±10%, 0.2 Ω, SMD 6032-28 TPSC686K016R0200 AVX
C3, C4, C5, C6 0 10 µF CAP, CERM, 10 µF, 16 V, ±10%, X5R, 0805 0805 GRM21BR61C106KE15L MuRata
C11 0 10 µF CAP, CERM, 10 µF, 16 V, ±20%, X5R, 0805 0805 0805YD106MAT2A AVX
FID1, FID2, FID3 0 Fiducial mark. There is nothing to buy or mount. N/A N/A N/A
J9, J10 0 Connector, SMA Jack, Vertical, Gold, SMD SMA 142-0711-201 Cinch Connectivity
J11, J12 0 TH, 6-Leads, Body 608 × 100 mil, Pitch 100 mil PEC06SAAN Sullins Connector Solutions

STANDARD TERMS FOR EVALUATION MODULES
1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or
documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance
with the terms set forth herein. User's acceptance of the EVM is expressly subject to the following terms.
1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms that accompany such Software
1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.
2Limited Warranty and Related Remedies/Disclaimers:
2.1 These terms do not apply to Software. The warranty, if any, for Software is covered in the applicable Software License
Agreement.
2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for a nonconforming EVM if (a) the nonconformity was caused by
neglect, misuse or mistreatment by an entity other than TI, including improper installation or testing, or for any EVMs that have
been altered or modified in any way by an entity other than TI, (b) the nonconformity resulted from User's design, specifications
or instructions for such EVMs or improper system design, or (c) User has not paid on time. Testing and other quality control
techniques are used to the extent TI deems necessary. TI does not test all parameters of each EVM.
User's claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects in the EVMs within ten (10)
business days after delivery, or of any hidden defects with ten (10) business days after the defect has been detected.
2.3 TI's sole liability shall be at its option to repair or replace EVMs that fail to conform to the warranty set forth above, or credit
User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the warranty
period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to repair or
replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall be
warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
warranty period.
WARNING
Evaluation Kits are intended solely for use by technically qualified,
professional electronics experts who are familiar with the dangers
and application risks associated with handling electrical mechanical
components, systems, and subsystems.
User shall operate the Evaluation Kit within TI’s recommended
guidelines and any applicable legal or environmental requirements
as well as reasonable and customary safeguards. Failure to set up
and/or operate the Evaluation Kit within TI’s recommended
guidelines may result in personal injury or death or property
damage. Proper set up entails following TI’s instructions for
electrical ratings of interface circuits such as input, output and
electrical loads.
NOTE:
EXPOSURE TO ELECTROSTATIC DISCHARGE (ESD) MAY CAUSE DEGREDATION OR FAILURE OF THE EVALUATION
KIT; TI RECOMMENDS STORAGE OF THE EVALUATION KIT IN A PROTECTIVE ESD BAG.