TPS22907

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SLVSA44 – NOVEMBER 2009

APPLICATION INFORMATION

On/Off Control

The ON pin controls the state of the switch. Activating ON continuously holds the switch in the on state so long

as there is no fault. ON is active high and has a low threshold, making it capable of interfacing with low-voltage

signals. The ON pin is compatible with standard GPIO logic threshold. It can be used with any microcontroller

with 1.2-V, 1.8-V, 2.5-V, or 3.3-V GPIOs.

Input Capacitor

To limit the voltage drop on the input supply caused by transient in-rush currents when the switch turns on into a

voltage drop during high-current application. When switching heavy loads, it is recommended to have an input

capacitor approximately ten times higher than the output capacitor to avoid excessive voltage drop.

Output Capacitor

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

electrical effects along with minimizing the case to ambient thermal impedance.

Copyright © 2009, Texas Instruments Incorporated

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