AP2181A/AP2191A

Document number: DS37618 Rev. 2 - 2

1 of 17

www.diodes.com

May 2018

© Diodes Incorporated

AP2181A/AP2191A

1.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH

Description

The AP2181A and AP2191A are integrated high-side power switches

optimized for Universal Serial Bus (USB) and other hot-swap

applications. This family of devices complies with USB 2.0 and is

available with both polarities of Enable input. The AP2181A and

AP2191A offer current and thermal limiting and short circuit protection

as well as controlled rise time and undervoltage lockout functionality.

A 7ms deglitch capability on the open-drain Flag output prevents false

over-current reporting and does not require any external components.

All

devices

are

available in SO-8,

MSOP-8EP,

SOT25

and

U-DFN2018-6 packages.

Features



Single USB Port Power Switches



Over-Current and Thermal Protection



2.1A Accurate Current Limiting



Reverse Current Blocking



95m

Ω On-Resistance



Input Voltage Range: 2.7V to 5.5V



0.6ms Typical Rise Time



Very Low Shutdown Current: 1µA (Max)



Fault Report (FLG) with Blanking Time (7ms Typ)



ESD Protection: 4kV HBM, 300V MM



Active Low (AP2181A) or Active High (AP2191A) Enable



Ambient Temperature Range: -40°C to +85°C



SOT25, SO-8, MSOP-8EP (Exposed Pad), and U-DFN2018-6:

Available in

“Green” Molding Compound (No Br, Sb)



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)



UL Recognized, File Number E322375



IEC60950-1 CB Scheme Certified

Applications



Consumer Electronics

– LCD TV & Monitor, Game Machines



Communications

– Set-Top Box, GPS, Smartphone



Computing

– Laptop, Desktop, Servers, Printers, Docking

Station, HUB

Pin Assignments

(Top View)

SO-8

(Top View)

MSOP-8EP

(Top View)

SOT25

(Top View)

U-DFN2018-6

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-free/

for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

EN

OUT

GND

IN

FLG

1

2

3

5

4

FLG

EN

GND

OUT

OUT

IN

1

3

2

4

5

6

1

2

3

4

8

7

6

5

NC

OUT

FLG

OUT

GND

EN

IN

IN

1

2

3

4

8

7

6

5

NC

OUT

FLG

OUT

GND

EN

IN

IN