AP2161/ AP2171
1A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Description Pin Assignments
The AP2161 and AP2171 are integrated high-side power switches
( Top View )
optimized for Universal Serial Bus (USB) and other hot-swap
applications. The family of devices complies with USB 2.0 and is
1 8
GND NC
available with both polarities of Enable input. They offer current and
2 7 OUT
IN
thermal limiting and short-circuit protection as well as controlled rise
time and undervoltage lockout functionality. A 7ms deglitch capability
IN 3 6 OUT
on the open-drain Flag output prevents false overcurrent reporting
and does not require any external components.
EN 4 5 FLG
SO-8
All devices are available in SO-8, MSOP-8EP, SOT25, and
U-DFN2018-6 packages
( Top View )
1 8 NC
GND
7
Features IN 2 OUT
6
3 OUT
IN
Single USB Port Power Switches
4 5
EN FLG
Overcurrent and Thermal Protection
1.5A Accurate Current Limiting
MSOP-8EP
Reverse Current Blocking
95m On-Resistance
( Top View )
Input Voltage Range: 2.7V 5.5V
0.6ms Typical Rise Time
OUT 1 5 IN
Very Low Shutdown Current: 1A (max)
Fault Report (FLG) with Blanking Time (7ms typ) GND 2
ESD Protection: 4kV HBM, 300V MM
FLG 3 4 EN
Active Low (AP2161) or Active High (AP2171) Enable
Ambient Temperature Range: -40C to +85C
SOT25, SO-8, MSOP-8EP (Exposed Pad), and U-DFN2018-6: SOT25
Available in Green Molding Compound (No Br, Sb)
( Top View )
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. Green Device (Note 3)
1
6
GND OUT
UL Recognized, File Number E322375
IEC60950-1 CB Scheme Certified
2 5
IN OUT
3 4
EN FLG
Applications
U-DFN2018-6
Consumer Electronics LCD TVs & Monitors, Game Machines
Communications Set-Top-Boxes, GPS, Smartphones
Computing Laptops, Desktops, Servers, Printers, Docking
Station, HUB
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See
AP2161/ AP2171
Typical Applications Circuit
AP2171 Enable Active High
IN Load
Power Supply OUT
2.7V to 5.5V
0.1uF
0.1uF
10k 10uF
120uF
FLG
EN
GND
ON
OFF
Available Options
Current Limit Recommended Maximum Continuous
Part Number Channel Enable Pin (EN)
(typ) Load Current
AP2161 1 Active Low 1.5A 1.0A
AP2171 1 Active High 1.5A 1.0A
Pin Descriptions
Pin Number
Pin
Function
Name
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 (AP2161) or active high (AP2171)
Overcurrent and over-temperature fault report; open-drain flag is active low when
FLG 5 5 3 4
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 pad.
Exposed tab - Exposed tab - Exposed tab It should be connected to GND and thermal mass for enhanced thermal
impedance. It should not be used as electrical ground conduction path.
2 of 18
AP2161/ AP2171 August 2015
Diodes Incorporated
www.diodes.com
Document number: DS31564 Rev. 9 - 2
