RT9017

Preliminary

2

DS9017-03 August 2007

www.richtek.com

Function Block Diagram

Functional Pin Description

Pin Name

Pin Function

EN

Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100k

Ω

resistor connected to GND when the control signal is floating.

NC

No Internal Connection.

GND

Ground.

VOUT

Output Voltage.

VIN

Input Voltage.

Typical Application Circuit

VIN

GND

NC

VOUT

EN

2

3

5

4

1

SOT-23-5 (R-Type)

SOT-23-5

EN

NC

VOUT

VIN

GND

2

3

5

4

1

VIN

GND

VOUT

RT9017

C

OUT

1uF

C

IN

1uF

V

IN

V

OUT

EN

Chip Enable

EN

Current-Limit

and

Thermal

Protection

MOS Driver

-

VOUT

Shutdown

and

Logic Control

VIN

Error

Amplifier

V

REF

GND