PRODUCT DATASHEET
AAT4684
OVPSwitch
TM
General Description
The AAT4684 OVPSwitch鈩?is a member of AnalogicTech鈥檚
Application Specific Power MOSFET鈩?(ASPM鈩? product
family. It is a P-channel MOSFET power switch with pre-
cise over-voltage protection control, designed to protect
low-voltage systems against high-voltage faults up to
+28V. If the input voltage exceeds the programmed
over-voltage threshold, the P-channel MOSFET switch
will be turned off to prevent damage to the output load
circuits. The AAT4684 is available with an internally pro-
grammed over-voltage trip point or as an adjustable
version programmed by two external resistors.
The AAT4684 also includes an under-voltage lockout
(UVLO) protection circuit, which will put the device into
sleep mode at low input voltages only consuming < 1渭A
of current.
The AAT4684 is offered in a small Pb-free, 12-pin
TSOPJW package and is specified for operation over the
-40擄C to +85擄C ambient temperature range.
Over-Voltage Protection Switch
Features
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Over-Voltage Protection Up to +28V
Fixed or Adjustable Over-Voltage Protection Threshold
3V Under-Voltage Lockout Threshold
Fast OVP Response:
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1渭s (Max) to Over-Voltage Transient
Low Operation Quiescent Current
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30渭A Typical
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1渭A Max in Shutdown (Disabled)
100m惟 Typical (130m惟 max) R
DS(ON)
at 4.5V
1.8A Maximum Continuous Current
Temperature Range: -40擄C to 85擄C
Available in TSOPJW-12 Package
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Applications
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Cell Phones
Digital Still Cameras
GPS
MP3 Players
Personal Data Assistants (PDAs)
USB Hot Swap/Live Insertion Device
Typical Application (Adjustable Version)
V
IO
+5V
V
IN
3V 鈥?28V
IN
FLT
Fault Flag
AAT4684
OVP
1渭F
EN
GND
OUT
V
OUT
4684.2007.11.1.1
www.analogictech.com
1
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