R2A20113DD/SP

REJ03F0279-0100 Rev.1.00 Oct 10, 2008

Page 2 of 6

Pin Arrangement

(Top view)

FB

1

COMP

2

RT

3

VREF

VCC

OUT

GND

CS

4

8

7

6

5

Pin Functions

Pin No.

Pin Name

Input/Output

Function

1

FB

Input

Error amplifier input terminal

2

COMP

Output

Error amplifier output terminal

3

RT

Input/Output

A resistor connection terminal for RAMP current setting

4

VREF

Output

Reference voltage output terminal

5

CS

Input

Zero current detection and overcurrent detection input terminal

6

GND

—

Ground

7

OUT

Output

Power MOSFET drive terminal

8

VCC

Input

Supply voltage terminal