AAT4900
Buffered Power Half-Bridge

Advanced Analogic Technologies, Inc.
1250 Oakmead Pkwy, Suite 310, Sunnyvale, CA 94086
(408)524-9684 Fax (408)524-9689
4900.2000.9.0.71
General Description
The AAT4900 FastSwitchge4 is a member of
AnalogicTech’s Application Specific Power
MOSFETge4 (ASPMge4) product family. It is a
Buffered Power Half-Bridge, consisting of low on-
resistance Power MOSFETs with integrated
control logic. This device operates with inputs
ranging from 2.7V to 5.5V, making it ideal for both
3V and 5V systems. The device is protected from
shoot-through current with its own control
circuitry. The AAT4900 is capable of very fast
switching times and is ideal for use in high
frequency DC to DC Converters. The quiescent
supply current is a low 1mA (max) at 1MHz CLK
frequency. In shutdown mode, the supply current
decreases to 1µA max
The AAT4900 is available in 5 pin SOT-23
specified over -40 to 85°C.
Features
•= 2.7V to 5.5V Input voltage range
•= 120mΩ (typ) Switch R
DS(ON)

•= Low quiescent current
•= 1µA (max) DC
•= 1mA (max) at 1MHz
•= Only 2.5V needed for Control Signal Input
•= Temp range -40 to 85°C
•= 5 pin SOT-23 package

Applications
•= High frequency DC/DC converters
•= Low-side MOSFET gate driver

Typical Applications


Ad
van
ced
In
fo
rmatio
n

AAT4900
EN
IN
OUT
CLK
GND
ENABLE
2.7V to 5.5V Input
OUTPUT
5
3
1
2
4
Control Circuit
(PWM Output)
SOT-23
DC/DC Converter Output Stage
8-1
FastSwitch
TM