RT9719

2

DS9719-01 April 2011

www.richtek.com

Function Block Diagram

Typical Application Circuit

RT9719

ACIN

GND

CHRIN

ISENSE

GATEDRV

1µF

1µF

0.2

SOC

CHRIN

GATEDRV

ISENSE

VBAT

1µF

Battery

Functional Pin Description

Pin No.

SOT-23-6

WDFN-8L 2x2

Pin Name

Pin Function

1

--

NC

No Internal Connection.

2

4

GND

Analog Ground.

3

1, 2, 3

ACIN

The Input Power Source. The VIN can withstand up to 30V input.

4

7, 8

ISENSE

Connect to ISENSE resistor and ISENSE pin of charging controller.

5

6

CHRIN

Voltage is equal to VIN as VIN in power good range and providing ~25mA

for system at most.

6

5

GATEDRV External control pin for controlling the P-MOSFET by charging controller.

--

9

(Exposed pad)

GND

connected to GND for maximum power dissipation.

Control

Logic

MUX

SW

SW

INOVP

UVLO

OTP

ACIN

ISENSE

CHRIN

GND

GATEDRV