RT9728

2

DS9728-05

October 2014

www.richtek.com

©

Copyright

2014 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Function Block Diagram

Pin No.

Pin Name

Pin Function

1

VOUT

Power Switch Output.

2

ILIM

External Resistor Used to Set Current Limit Threshold. Recommended 19.1k



3

FAULT

Active-Low Open-Drain Output. Asserted during over current, over temperature,

or reverse voltage conditions.

4

EN

Chip Enable (Active High).

5,

7 (Exposed Pad)

GND

Ground. The exposed pad must be soldered to a large PCB and connected to

GND for maximum power dissipation.

6

VIN

Supply Input Voltage.

Functional Pin Description

UVLO

Current

Limit

7.5ms

Deglitch

4ms

Deglitch

Thermal

Sense

Drive

Reverse Voltage

Comparator

Switch

well

Current

Sense

+

-

VOUT

ILIM

GND

EN

VIN

FAULT

Typical Application Circuit

VIN

RT9728

ILIM

VOUT

150µF

FAULT

EN

GND

FAULT Signal

100k

1

2

3

4

5, 7 (Exposed Pad)

6

10µF

Chip Enable