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TPS22810 Datasheet(PDF) 13 Page - Texas Instruments

Part # TPS22810
Description  2.7-18-V, On-Resistance Load Switch With Thermal Protection
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS22810 Datasheet(HTML) 13 Page - Texas Instruments

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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
www.ti.com
SLVSDH0B – DECEMBER 2016 – REVISED MAY 2017
Product Folder Links: TPS22810
Submit Documentation Feedback
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
controlled with the value of the internal resistance RPD. The value of this resistance is listed in the Electrical
Characteristics table.
QOD pin connected to VOUT pin using an external resistor REXT. After the switch becomes disabled, the
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.
RQOD = RPD + REXT
where
RQOD is the total output discharge resistance
RPD is the internal pulldown resistance
REXT is the external resistance placed between the VOUT and QOD pin.
(1)


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