AP2181D/AP2191D

1.5A SINGLE CHANNEL CURRENT-LIMITED POWER

SWITCH WITH OUTPUT DISCHARGE

AP2181D/2191D

Document number: DS32251 Rev. 2 - 2

2 of 17

www.diodes.com

September 2010

© Diodes Incorporated

Typical Application Circuit

0.1uF

IN

GND

EN

OUT

ON

120uF

Power Supply

2.7V to 5.5V

0.1uF

OFF

FLG

Load

10k

10uF

AP2191D Enable Active High

Available Options

Part Number

Channel

Enable pin (EN)

Current limit (typical)

Recommended maximum

continuous load current

AP2181D

1

Active Low

2.1A

1.5A

AP2191D

1

Active High

2.1A

1.5A

Pin Descriptions

Pin

Name

Pin Number

Descriptions

SO-8

SOT25

DFN2018-6

MSOP-8

MSOP-8-EP

GND

1

2

1

Ground

IN

2, 3

5

2

Voltage input pin (all IN pins must be tied together externally)

EN

4

4

3

Enable input, active low (AP2181D) or active high (AP2191D)

FLG

5

3

4

Over-current and over-temperature fault report; open-drain flag is

active low when triggered

OUT

6, 7

1

5, 6

Voltage output pin (all OUT pins must be tied together externally)

NC

8

N/A

N/A

No internal connection; recommend tie to OUT pins