S1F71100 Series

PIN ASSIGNMENTS

Top View

SSCAP

 

1

 

8

 

VSS

 

 

 

POFFX

 

2

Index

7

 

VO

 

 

 

 

 

VDD

 

3

 

6

 

ERCAP

 

 

 

ISENSE

 

4

 

5

 

SWO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SOP4-8pin

PIN DESCRIPTIONS

 

 

 

 

 

 

 

Pin No.

Pin name

Pin Type

Description

 

 

 

 

 

 

1

SSCAP

The soft start function is obtained when a capacitor is connected

 

 

 

 

between the capacitor connection pin for setting soft start and the VSS

 

 

 

 

pin.

 

 

 

 

 

 

2

POFFX

Power off control pin

 

 

 

 

During normal operation : VDD level

 

 

 

 

At power off time : VSS level

 

 

 

 

 

 

3

VDD

Power

Power supply pin (+)

 

 

 

supply

 

 

 

 

 

 

 

4

ISENSE

Load current feedback pin

 

 

 

 

Load current detection resistor connection pin

 

 

 

 

(Connect a resistor of 100mΩ)

 

 

 

 

 

 

5

SWO

Output

Switching Pch power MOS transistor drive pin

 

 

 

 

 

 

6

ERCAP

Capacitor connection pin for external phase compensation

 

 

 

 

 

 

7

VO

Input

Output voltage feedback pin

 

 

 

 

 

 

8

VSS

Power

Power supply pin (–)

 

 

 

supply

 

 

 

 

 

 

S1F71100

Series

 

 

S1F70000 Series Technical Manual

EPSON

4–35