RT9701

2

DS9701-13 March 2007

www.richtek.com

Function Block Diagram

Test Circuits

Test Circuit 1

Test Circuit 2

Test Circuit 3

Test Circuit 2 is performed by charging an external tank of bulk capacitor to the input then applying this voltage to the

input of the unit.

All typical operating characteristics curves showed are referred to Test Circuit 1, unless specified to Test Circuit 2 or

Test Circuit 3.

RT9701CBL

VIN

VIN

VOUT

VOUT

GND

V

OUT

V

IN

C

IN

1uF

I

OUT

R

L

C

L

I

L

+

RT9701CBL

VIN

VIN

VOUT

VOUT

GND

V

OUT

V

IN

C

IN

1uF

R

L

C

L

V

IN-SW

+

Switch Off

RT9701CB

VIN

EN

VOUT

VOUT

GND

V

OUT

V

IN

C

IN

1uF

I

OUT

R

L

C

L

I

L

+

Chip Enable

Control

Thermal

Detection

Current

Limit

Bias

Charge

Pump

Oscillator

NMOSFET

RS

EN

VIN

(VIN)

(VOUT)

VOUT

GND

Functional Pin Description

Pin Name

Pin Function

VIN

Power Input Voltage

VOUT

Output Voltage

GND

Ground

EN

Chip Enable (Active High)