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User's Guide
TPS7B4255EVM-062 Evaluation Module
This user's guide describes the operational use of the TPS7B4255EVM-062 evaluation module (EVM) as
a reference design for engineering demonstration and evaluation of the TPS7B4255-Q1 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 evaluation board, evaluation module, and EVM are synonymous with the
TPS7B4255EVM-062.
SLVUCA5 – JUNE 2022
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ABSTRACT
Figure 1-1. TPS7B4255EVM-062 Evaluation Module
Copyright © 2022 Texas Instruments Incorporated
TPS7B4255EVM-062 Evaluation Module
1
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Summary of Contents for Texas Instruments TPS7B4255EVM-062
- Page 1 ABSTRACT Figure 1-1. TPS7B4255EVM-062 Evaluation Module This user's guide describes the operational use of the TPS7B4255EVM-062 evaluation module (EVM) as a reference design for engineering demonstration and evaluation of the TPS7B4255-Q1 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).
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Page 2: Table Of Contents
Schematic..................................4 Figure 3-1. TPS7B4255EVM-062 Turn-On..........................7 Figure 3-2. TPS7B4255EVM-062 With Current Probes Attached....................Figure 3-3. TPS7B4255EVM-062 Load Transient Results: 50-μA to 70-mA Load Step..............9 Figure 3-4. TPS7B4255EVM-062 Load Transient Results: 70-mA to 50-μA Load Step..............9 Figure 4-1. Top Assembly Layer and Silkscreen........................ -
Page 3: Introduction
Failure to adhere to these steps or to not heed the safety requirements at each step may lead to shock, injury, and damage to the hardware. Texas Instruments is not responsible or liable in any way for shock, injury, or damage caused by negligence or failure to heed advice. If you are not trained in the proper safety of handling and testing power electronics please do not test this evaluation module. -
Page 4: Tps7B4255Evm-062 Schematic
TPS7B4255EVM-062 Schematic www.ti.com 2 TPS7B4255EVM-062 Schematic Figure 2-1 shows a schematic for the TPS7B4255EVM-062. VOUT Vin Max = 45V Vout Max = 45V Iin Max = 70mA Iout Max = 70mA ADJ/EN 4.7µF 1µF ADJ/EN 100V 100V 100V 100V 1µF 1µF... -
Page 5: Setup
TP1 to drive ADJ/EN directly, or a combination of J5, R1, R3, C10 to configure ADJ/EN to be a function of the input voltage. SLVUCA5 – JUNE 2022 TPS7B4255EVM-062 Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 6: Optional Load Transient Input/Output Connector Descriptions
TPS7B84-Q1 LDO after VIN is applied. Figure 3-1 illustrates the result of the TPS7B4255EVM-062 during turn-on. Jumper J14 has a shunt to connect EN of the TPS7B84-Q1 to VIN to enable the device for this turn-on plot. TPS7B4255EVM-062 Evaluation Module SLVUCA5 –... -
Page 7: Figure 3-1. Tps7B4255Evm-062 Turn-On
TPS7B84-Q1 circuit or its peripherals during start up or during any other operational mode. Thus, the I current probe slot can be used to isolate and accurately measure current into the TPS7B4255-Q1 solution. SLVUCA5 – JUNE 2022 TPS7B4255EVM-062 Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 8: Figure 3-2. Tps7B4255Evm-062 With Current Probes Attached
Setup www.ti.com Figure 3-2. TPS7B4255EVM-062 With Current Probes Attached The user has two options for providing a DC load on the output of the TPS7B4255-Q1. J7 can be used to place a DC load that flows through the current sense path on the output of the LDO. Alternatively, the J4 (VOUT) and J10 (GND) banana connectors can be used for external measurements and loading;... -
Page 9: Optional Load Transient Circuit Operation
Setup 3.4 Optional Load Transient Circuit Operation The TPS7B4255EVM-062 evaluation module contains an optional high-performance load transient circuit to allow efficient testing of the TPS7B4255-Q1 LDO load transient performance. To use the optional load transient circuit, install the correct components in accordance with the application. Modify the input and output capacitance connected to the TPS7B4255-Q1 LDO to match the expected operating conditions. -
Page 10: Board Layout
TPS7B4255EVM-062 PCB. The TPS7B4255EVM-062 dissipates power, which may cause some components to experience an increase in temperature. The TPS7B4255-Q1 LDO and pulsed resistors R9, R10, R11, R12, and R13 are most at risk of raising the junction temperature during normal operation. -
Page 11: Figure 4-5. Internal Layer 3
Board Layout Figure 4-6. Internal Layer 4 Figure 4-5. Internal Layer 3 Figure 4-7. Bottom Layer Routing Figure 4-8. Bottom Assembly Layer and Silkscreen SLVUCA5 – JUNE 2022 TPS7B4255EVM-062 Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 12: Bill Of Materials
Bill of Materials www.ti.com 5 Bill of Materials Table 5-1 shows the bill of materials for the TPS7B4255EVM-062. Table 5-1. Bill of Materials Designator Quantity Value Description PackageReference PartNumber Manufacturer Alternate Alternate PartNumber Manufacturer !PCB1 Printed Circuit Board LP062 C4, C8 1µF... - Page 13 Header, 100mil, 2x2, Gold, TH 2x2 Header TSW-102-07-G-D Samtec J22, J26 SMA Straight Jack, Gold, 50 Ohm, TH SMA Straight Jack, 901-144-8RFX Amphenol RF SLVUCA5 – JUNE 2022 TPS7B4255EVM-062 Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
- Page 14 RES, 0, 5%, 0.125 W, AEC-Q200 Grade 0805 ERJ-6GEY0R00V Panasonic 0, 0805 R18, R19 RES, 0, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 RMCF0603ZT0R00 Stackpole 0603 Electronics Inc TPS7B4255EVM-062 Evaluation Module SLVUCA5 – JUNE 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
- Page 15 STANDARD TERMS FOR EVALUATION MODULES 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.
- Page 16 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
- Page 17 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
- Page 18 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
- Page 19 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated...
- Page 20 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2022, Texas Instruments Incorporated...
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