Power

Supply

EN/

UVLO

GND

VIN

CT

VOUT

OFF

ON

TPS22810

QOD

Copyright © 2016, Texas Instruments Incorporated

18

TPS22810

SLVSDH0B – DECEMBER 2016 – REVISED MAY 2017

www.ti.com

Product Folder Links: TPS22810

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Copyright © 2016–2017, Texas Instruments Incorporated

10 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

10.1 Application Information

This section highlights some of the design considerations when implementing this device in various applications.

A PSPICE model for this device is also available in the product page of this device on www.ti.com (See the

Device Support section for more information).

10.1.1 ON and OFF Control

The EN/UVLO pin controls the state of the switch. Asserting EN/UVLO high enables the switch. EN/UVLO is

active high and has a low threshold, making it capable of interfacing with low-voltage signals. The EN/UVLO pin

is compatible with standard GPIO logic thresholds. It can be used with any microcontroller with 1.2 V or higher

GPIO voltage. This pin cannot be left floating and must be driven either high or low for proper functionality.

10.1.2 Input Capacitor (Optional)

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

during high current applications. When switching heavy loads, it is recommended to have an input capacitor

about 10 times higher than the output capacitor to avoid excessive voltage drop.

10.1.3 Output Capacitor (Optional)

dip caused by inrush currents during startup; however, a 10 to 1 ratio for capacitance is not required for proper

functionality of the device. A ratio smaller than 10 to 1 (such as 1 to 1) can cause slightly more VIN dip upon

turnon due to inrush currents.

This can be mitigated by increasing the capacitance on the CT pin for a longer rise time.

10.2 Typical Application

This typical application demonstrates how the TPS22810 can be used to power downstream modules.

Figure 21. Typical Application Schematic