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TPS65257 High Current, Synchronous Step Down Three
Buck Switcher Evaluation Module with 1USB Switch and
This document presents the information required to power the TPS65257 PMIC as well as the support
documentation including schematic and bill of materials.
1
Background and EVM Limitations
2
Power-up Procedure
3
TPS65258EVM Schematic
4
5
5.1
5.2
1
TPS65258EVM Schematic
2
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3
4
5
Middle (3rd) Layer
6
1
Input Voltage and Output Current Summary
2
Bill of Materials
SLVU568 - September 2011
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TPS65257 High Current, Synchronous Step Down Three Buck Switcher
Copyright © 2011, Texas Instruments Incorporated
Push Button Controller
Contents
List of Figures
List of Tables
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Evaluation Module with 1USB Switch and Push Button Controller
User's Guide
SLVU568 - September 2011
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Summary of Contents for Texas Instruments TPS65257
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Page 1: Table Of Contents
TPS65257 High Current, Synchronous Step Down Three Buck Switcher Evaluation Module with 1USB Switch and Push Button Controller This document presents the information required to power the TPS65257 PMIC as well as the support documentation including schematic and bill of materials. Contents .................. - Page 2 Background and EVM Limitations The TPS65257 PMIC is designed to provide 3A, 2A, and 2 A continuous outputs with an operational range of 4.5 to 16V and a externally set switching frequency ranging from 300kHz to 2.2MHz, with automatic PFM/PWM operation .
- Page 3 TPS65258EVM Schematic www.ti.com Figure 1. TPS65258EVM Schematic SLVU568 – September 2011 TPS65257 High Current, Synchronous Step Down Three Buck Switcher Evaluation Module with 1USB Switch and Push Button Controller Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...
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Page 4: Composite Layer
TPS65258EVM Schematic www.ti.com Figure 2. Composite Layer SLVU568 – September 2011 TPS65257 High Current, Synchronous Step Down Three Buck Switcher Evaluation Module with 1USB Switch and Push Button Controller Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated... -
Page 5: Evm Layout
Figure 5. Middle (3rd) Layer Figure 6. Bottom Layer SLVU568 – September 2011 TPS65257 High Current, Synchronous Step Down Three Buck Switcher Evaluation Module with 1USB Switch and Push Button Controller Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated... -
Page 6: Bench Test Setup Conditons
Bench Test Setup Conditons Headers description and jumper placement. SLVU568 – September 2011 TPS65257 High Current, Synchronous Step Down Three Buck Switcher Evaluation Module with 1USB Switch and Push Button Controller Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated... -
Page 7: Headers Description
USB1 switch input Black TP33 USB1_Vo USB1 switch output Black SLVU568 – September 2011 TPS65257 High Current, Synchronous Step Down Three Buck Switcher Evaluation Module with 1USB Switch and Push Button Controller Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated... - Page 8 TPS65258 Items with gray backgrounds are optional/not needed for a reference design. SLVU568 – September 2011 TPS65257 High Current, Synchronous Step Down Three Buck Switcher Evaluation Module with 1USB Switch and Push Button Controller Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated...
- Page 9 Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
- Page 10 Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization.
- Page 11 FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
- Page 12 Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp...
- Page 13 FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated...
- Page 14 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.