Charge Pump

VIN

EN/UVLO

VOUT

GND

CT

Control Logic

2.54 V

2.4 V

1.23 V

1.13 V

Thermal

Shutdown

QOD

Copyright © 2016, Texas Instruments Incorporated

13

TPS22810

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SLVSDH0B – DECEMBER 2016 – REVISED MAY 2017

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Copyright © 2016–2017, Texas Instruments Incorporated

9.2 Functional Block Diagram

9.3 Feature Description

9.3.1 On and Off Control

TThe EN/UVLO pin controls the state of 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

threshold. 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.

9.3.2 Quick Output Discharge (QOD)

The TPS22810 includes a QOD feature. The QOD pin can be configured in one of three ways:

•

QOD pin shorted to VOUT pin. Using this method, the discharge rate after the switch becomes disabled is

Characteristics table.

•

discharge rate is controlled by the value of the total resistance of the QOD. To adjust the total QOD

resistance, Equation 1 can be used.

where

•

•

•

(1)