USB Dual-Channel Power Switch
AAT4626
SmartSwitch
™
General Description
The AAT4626 SmartSwitch is part of AnalogicTech's
Application Specific Power MOSFET™ (ASPM™)
product family. It is a dual-channel 500mA current-
limited P-channel MOSFET power 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 AAT4626 is also protected from thermal over-
load which limits power dissipation and junction
temperatures. The current limit threshold is factory
programmed at 1.0A, with a maximum of 1.5A. The
quiescent supply current is typically a low 20µA. In
shutdown mode, the supply current decreases to
less than 1µA.
The AAT4626 is available in a Pb-free, 8-pin SOP
or TSSOP package and is specified over the -40°C
to +85°C temperature range.
The AAT4600 series is a family of adjustable and
fixed SmartSwitch products with a range of current
handling capabilities. Single versions are available
with adjustable current limit (AAT4601) or fixed cur-
rent limit (AAT4625), as well as dual versions with
fixed current limit (AAT4626).
Features
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2.7V to 5.5V Input Voltage Range
Compliant to USB 1.1 and 2.0 Specifications
500mA (Min) Continuous Current per Channel
1.25A (Max) Current Limit per Channel
90mΩ Typical R
DS(ON)
Low Quiescent Current:
— Typically 20µA
— 1µA Max with Switches Off
Thermal Shutdown
Slew Rate Limited Turn On
Fault Flag with 2ms Blanking
Under-Voltage Lockout
Temperature Range: -40°C to +85°C
UL Approved—File No. E217765
8-Pin SOP or TSSOP Package
Applications
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General-Purpose Power Switching
Hot Swap Supplies
Notebook Computers
USB Ports and Peripherals
UL Recognized Component
Typical Application
100kΩ
100kΩ
V
CC
5.0V
ENA
(ENA)
ENB
0.1μF
(ENB)
7
IN
FLGA
2
3
8
5
ENA
1
(ENA)
4
AAT4626
FLGB
OUTA
OUTPUTA
OUTPUTB
ENB
(ENB)
GND
6
OUTB
47μF
GND
47μF
GND
4626.2006.05.1.2
1
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
