AP2181A/AP2191A

Document number: DS37618 Rev. 2 - 2

2 of 17

www.diodes.com

May 2018

© Diodes Incorporated

AP2181A/AP2191A

Typical Applications Circuit

0.1

μF

IN

GND

EN

OUT

ON

120

μF

Power Supply

2.7V to 5.5V

0.1

μF

OFF

FLG

Load

10k

10

μF

AP2191A Enable Active High

Available Options

Part Number

Channel

Enable Pin (EN)

Current Limit

(Typ)

Recommended Maximum Continuous

Load Current

AP2181A

1

Active Low

2.1A

1.5A

AP2191A

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 (AP2181A) or active high (AP2191A)

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.