3

NR092005

HV9921/HV9922/HV9923

Functional Block Diagram

V

DD

REF

+

-

R

DRAIN

GND

HV9921/22/23

S

R

Q

Q

Regulator

7.0V

T

T

Pin Configuration

1-Drain

2-GND

1

2

3

1 2 3

TO-92

TO-243AA (SOT-89)

Drain – This is a drain terminal of the output switching

MOSFET and a linear regulator input.

GND – This is a common connection for all circuits.

V

This is a power supply pin for all control circuits.

Bypass this pin with a 0.1uF low impedance

capacitor.