AAT4626
USB Dual-Channel Power Switch
™
SmartSwitch
General Description
Features
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 rang-
ing from 2.7V to 5.5V, making it ideal for both 3V
and 5V systems. An integrated current-limiting cir-
cuit 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 overload which limits power dissipa-
tion 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.
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Compliant to USB 1.1 and 2.0 specifications
2.7V to 5.5V Input voltage range
500mA (min) continuous current per channel
1.25A (max) current limit per channel
90mΩ typical RDS(ON)
Low quiescent current
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Typically 20µA
1µA max with Switches off
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Thermal shutdown
Slew rate limited turn on
Fault flag with 2ms blanking
Undervoltage Lockout
Temp range -40 to 85°C
UL Approved—File No. E217765
8 pin SOP or TSSOP package
The AAT4626 is available in 8 pin SOP or TSSOP
specified over a -40 to 85°C temperature range.
Applications
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 also available.
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USB ports and peripherals
Notebook computers
Hot swap supplies
General purpose power switching
UL Recognized Component
Typical Application
100kΩ
100kΩ
VCC 5.0V
2
FLGA
3
AAT4626
ENA
ENA
FLGB
1
4
(ENA)
(ENA)
OUTPUTA
8
OUTA
ENB
ENB
OUTPUTB
5
OUTB
(ENB)
(ENB)
0.1µF
6
47µF
47µF
GND
GND
4626.2002.1.0.93
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