Document
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 95mΩ On-Resistance Input Voltage Range: 2.7V – 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
GND 1
( Top View )
8 NC
IN 2
7 OUT
IN 3
6 OUT
EN 4
SO-8
5 FLG
GND IN IN EN
1 2 3 4
( Top View )
8 NC 7 OUT 6 OUT 5 FLG
MSOP-8EP
( Top View )
OUT 1 GND 2 FLG 3
5 IN 4 EN
SOT25
( Top View )
GND 1
6 OUT
IN 2
5 OUT
EN 3
4 FLG
U-DFN2018-6
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html 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.
AP2181A/ AP2191A
Document number: DS37618 Rev. 1 - 2
1 of 17 www.diodes.com
March 2015
© Diodes Incorporated
AP2181A/ AP2191A
Typical Applications Circuit
AP2191A Enable Active High
Power Supply 2.7V to 5.5V
IN 10k 10uF 0.1uF
OUT
FLG
ON OFF
EN GND
Load
0.1uF
120uF
Available Options
Part Number
AP2181A AP2191A
Channel
1 1
Enable Pin (EN)
Active Low Active High
Current Limit (typ) 2.1A 2.1A
Recommended Maximum Continuous Load Current 1.5A 1.5A
Pin Descriptions
Pin Name GND
IN EN
FLG
OUT NC
SO-8 1
2, 3 4
5
6, 7 8
Exposed tab
-
Pin Number MSOP-8EP SOT25
12 2, 3 5
44
53
6, 7 1 8 N/A
Exposed tab
-
U-DFN2018-6
Function
1 Ground
2 Voltage Input Pin (all IN pins must be tied together externally)
3 Enable input, active low (AP2181A) or active high (AP2191A)
4
Over-current and over-temperature fault report; open-drain flag is active low when triggered
5, 6 Voltage Output Pin (all OUT pins must be tied together externally)
N/A No internal connection; recommend tie to OUT pins
Exposed Pad 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.
AP2181A/ AP2191A
Document number: DS37618 Rev. 1 - 2
2 of 17 www.diodes.com
March 2015
© Diodes Incorporated
AP2181A/ AP2191A
Functional Block Diagram
IN UVLO
EN
AP2181A, AP2191A
Current Sense
Driver
Current Limit
Thermal Sense
Deglitch
OUT FLG GND
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)
Symbol ESD HBM
ESD MM
VIN VOUT VEN , VFLG ILOAD TJ(MAX) TST
Parameter Human Body Model ESD Protection Machine Model ESD Protection for MSOP-8EP, SOT25 Packages Machine Model ESD Protection for U-DFN2018-6, SO-8 Packages Input Voltage Output Voltage Enable Voltage Maximum Continuous Load Current Maximum Junction Temperature
Storage Temperature Range (Note 4)
Ratings 4
400
300
6.5 VIN +0.3
6.5 Internal Limited
150 -65 to +150
Units kV
V
V
V V V A °C °C
Caution: Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
Note:
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and transporting these devices
4. UL Recognized Rating from -30°C to +70°C (Diodes qualified TST from -65°C to +150°C)
Recommended Operating Con.