AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

2 of 17

www.diodes.com

March 2013

© Diodes Incorporated

AP2181/ AP2191

Typical Applications Circuit

0.1uF

IN

GND

EN

OUT

ON

120uF

Power Supply

2.7V to 5.5V

0.1uF

OFF

FLG

Load

10k

10uF

AP2191 Enable Active High

Available Options

Part Number

Channel

Enable Pin (EN)

Current Limit

(typ)

Recommended Maximum Continuous

Load Current

AP2181

1

Active Low

2.1A

1.5A

AP2191

1

Active High

2.1A

1.5A

Pin Descriptions

Pin

Name

Pin Number

Function

SO-8

MSOP-8EP

SOT25

U-DFN2018-6

GND

1

1

2

1

Ground

IN

2, 3

2, 3

5

2

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

EN

4

4

4

3

Enable input, active low (AP2181) or active high (AP2191)

FLG

5

5

3

4

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

triggered

OUT

6, 7

6, 7

1

5, 6

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

NC

8

8

N/A

N/A

No internal connection; recommend tie to OUT pins

Exposed tab

-

Exposed tab

-

Exposed tab

Exposed pad.

It should be connected to GND and thermal mass for enhanced thermal

impedance. It should not be used as electrical ground conduction path.