RT9758 datasheet(3/61 Pages) RICHTEK

3 / 61 page

RT9758

is a registered trademark of Richtek Technology Corporation.

DS9758-03

May 2023

www.richtek.com

Pin No.

Pin Name

I/O

Pin Function

BST1

Charge pump for gate drive. Connect a 22nF capacitor between

BST1 and CFH1.

Device enable control pin. Pull high to disable device. I2C is still

available when EN pin is pull high.

INT

Open drain interrupt output. Connect to pull-up voltage via 10k



pull-up resistor. Normally high, when event happen, INT pin sends

a 256

s low pulse to system.

WRX_OK

Push-pull structure. When WRX_IN over then WRX_INSERT level,

this pin will pull high to inform system.

E3, F3

CFH1

Flying capacitor positive node. Two 22

F capacitors must be

connected to CFL1 and CFH1 and placed as close as possible to

the device. These pins must be connected together on the PCB.

E5, F5

CFL1

Flying capacitor negative node. Two 22

F capacitors must be

connected to CFL1 and CFH1 and placed as close as possible to

the device. These pins must be connected together on the PCB.

SYNC

AIO

Push-pull structure. Master device's sync pin connect to slave

device's sync pin. Let pin floating in standalone mode.

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