RT9745A

3

DS9745A-00 August 2014

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Copyright 2014 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Function Block Diagram

Operation

The RT9745A contains two N-MOSFETs which controlled

by EN pin independently.

Enable Control

Asserting ENx pin high enables the switch. Switch will

under low voltage logic, please refer to the electrical

characteristics. This pin cannot be left floating and must

be tied either high or low voltage for proper functionality.

Charge Pump

Provides sufficient bias voltage to both N-MOSFETs.

Adjustable Rise Time

Connecting a capacitor to GND on the SSx pin sets the

slew rate for each channel. It could also be used to prevent

in-rush current.

Control Logic

Charge Pump

Control Logic

VOUT1

GND

VOUT2

VIN2

EN2

SS2

VDD

SS1

EN1

VIN1