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User's Guide

SLVU501A–August 2011– Revised January 2012

TPS2291xxEVM-656

This user's guide describes the characteristics, operation, and use of the TPS2291xxEVM-656 evaluation

module (EVM). This EVM demonstrates the Texas Instruments TPS2291xx load switch with controlled

turn on. The device contains a P-channel MOSFET that can operate over an input voltage of 1.4V to 5.5V.

The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage

control signals. This user's guide includes setup instructions, schematic diagram, bill of materials, and

printed-circuit board layout drawings for the EVM.

1 Introduction

The TPS2291xxEVM-656 evaluation module (EVM) helps designers evaluate the operation and

performance of the TPS2291xx load switches. The board features the small 4-pin CSP package for a

small solution size.

Table 1. TPS22910, TPS22912, TPS22913 Vout Rise Time, Enable, and Discharge

Options

Rise Time (µS) Enable Quick Output

EVM Device VIN(V)

Typ. (ON Pin) Discharge

HPA656-001 TPS22910A 0.5 5 Active Low No

HPA656-0011 TPS22912C 1000 5 Active High No

HPA656-0014 TPS22913B 100 5 Active High Yes

HPA656-0015 TPS22913C 1000 5 Active High Yes

1.1 Related Documentation From Texas Instruments

TPS2291xx, ULTRA-SMALL, LOW r

LOAD SWITCH data sheet

SLVU501A–August 2011–Revised January 2012 TPS2291xxEVM-656

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Summary of content (10 pages)

PAGE 1
User's Guide SLVU501A – August 2011 – Revised January 2012 TPS2291xxEVM-656 This user's guide describes the characteristics, operation, and use of the TPS2291xxEVM-656 evaluation module (EVM). This EVM demonstrates the Texas Instruments TPS2291xx load switch with controlled turn on. The device contains a P-channel MOSFET that can operate over an input voltage of 1.4V to 5.5V. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals.
PAGE 2
Setup 2 www.ti.com Setup This section describes the jumpers and connectors on the EVM as well as how to properly connect, set up, and use the TPS2291xxEVM-656. 2.1 J1/J3 – Input Connections This is the connection for the leads from the input source. Connect the positive connection to the VIN J1 and the negative connection to the GND J3. 2.2 J4/J6 – Output Connections This is the connection for the output of the TPS2291xxEVM.
PAGE 3
Operation www.ti.com 3 Operation Connect the positive input of the power supply to the VIN J1 and the negative lead of the power supply to GND J3. The input voltage range of the TPS2291xx is 1.4 V to 5.5 V. Output load can be applied by connecting between J4 VOUT and J6 GND. The TPS2291xx is rated for a maximum continuous current of 2A. Configure jumper JP3 as required. JP3 must be installed for proper operation. When the ON pin is asserted, the TPS2291xx will control the slew rate of VOUT.
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Board Layout, Schematic, and Bill of Materials 5 www.ti.com Board Layout, Schematic, and Bill of Materials This section provides the TPS2291xxEVM-656 board layout, schematic, and bill of materials. 5.1 Board Layout For best performance, all traces should be as short as possible. To be most effective, the input and output capacitors should be placed close to the device to minimize the effects that parasitic trace inductances may have on normal and short-circuit operation.
PAGE 5
Board Layout, Schematic, and Bill of Materials www.ti.com Figure 3. Bottom Layer 5.2 Schematic and Bill of Materials Figure 4.
PAGE 6
Board Layout, Schematic, and Bill of Materials www.ti.com Table 2. Bill of Materials Count (1) (2) (3) (4) RefDes Value (1) (2) (3) (4) Description Size Part Number MFR HPA656 Any 603 Std Std 1 µF, use 10 µF Capacitor, Ceramic,6.
PAGE 7
Board Layout, Schematic, and Bill of Materials www.ti.com 5.3 VOUT Rise Time Examples Figure 5. TPS22910A Trise Example Figure 6.
PAGE 8
Board Layout, Schematic, and Bill of Materials www.ti.com Figure 7.
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
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.