SmartSwitch
™
AAT4625
USB Single-Channel Power Switch
Preliminary
Information
4625.2002.1.0.93 1
General Description
The AAT4625 SmartSwitch™ is part of
AnalogicTech's Application Specific Power
MOSFET™ (ASPM™) product family. It is a 1.0A
Current Limited P-channel, MOSFETpower switch
designed for high-side load-switching applications.
This switch operates with inputs ranging from 2.7V
to 5.5V, making it ideal for both 3V and 5V systems.
An integrated current-limiting circuit protects the
input supply against large changes in load current
which may cause the supply to fall out of regulation.
The AAT4625 is also protected from thermal over-
load which limits power dissipation and junction
temperatures. The current limit threshold is factory
programmed at 1.5A, with a maximum of 2.0A. The
quiescent supply current is typically a low 16µA. In
shutdown mode, the supply current decreases to
less than 1µA.
The AAT4625 is available in 8 pin SOPor TSSOP
and is specified over a -40 to 85°C temperature
range.
The AAT4600 Series is a family of adjustable and
fixed SmartSwitch™ products with a range of cur-
rent handling capabilities. Single versions with
adjustable current limit (AAT4601) or fixed current
limit (AAT4625) as well as dual versions with fixed
current limit (AAT4626) are available.
Features
• Compliant with USB 1.1 and 2.0 specifications
• 2.7V to 5.5V Input voltage range
• 1.0Aminimum continuous current
• 2.0Amaximum current limit
• 60mΩ typical R
DS(ON)
• Low quiescent current
• Typically 16µA
• 1µAmax with Switch off
• Thermal shutdown
• Fault flag with 10ms blanking
• Undervoltage Lockout
• Temp range -40 to 85°C
• ULApproved—File No. E217765
• 8 pin SOPor TSSOPpackage
Applications
• USB ports and peripherals
• Notebook computers
• Hot swap supplies
• General purpose power switching
ULRecognized Component
Typical Application
120µF
GNDGND
OUTPUT
OUT
OUT
IN
EN (EN)EN (EN)
0.1µF
V
CC
5.0V
100k
FLG
7
2
1
3
8
6
AAT4625