RT9173B

2

DS9173B-09 March 2007

www.richtek.com

Typical Application Circuit

μF (Ceramic) + 1000μF under the worst case testing condition

Ω as for VOUT discharge when VIN is not present but VCNTL is present

VIN

REFEN

GND

VCNTL

VOUT

RT9173B

EN

2N7002

R

1

R

2

V

V

C

CNTL

C

IN

R

TT

C

OUT

R

DUMMY

Test Circuit

Figure 2. Current in Shutdown Mode,

Figure 1. Output Voltage Tolerance,

VIN

REFEN

GND

VCNTL

VOUT

RT9173B

2.5V

3.3V

1.25V

C

OUT

I

L

V

OUT

V

VIN

REFEN

GND

VCNTL

VOUT

RT9173B

2.5V

3.3V

1.25V

C

OUT

V

OUT

V

R

L

1.25V

0V

R

Time deleay

0.2V

A