Buffered Power Half-Bridge
General Description
The AAT4900 FastSwitch is a member of
AnalogicTech's Application Specific Power
MOSFET™ (ASPM™) 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 2.0V to 5.5V, making it ideal for 2.5V, 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/DC con-
verters. The quiescent supply current is a low 4mA
at 1MHz CLK frequency. In shutdown mode, the
supply current decreases to less than 1µA max.
The AAT4900 is available in a Pb-free 5-pin
SOT23 or 8-pin SC70JW package and is specified
over the -40°C to +85°C temperature range.
AAT4900
Features
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FastSwitch
™
2.0V to 5.5V Input Voltage Range
105mΩ (typ) Low Side Switch R
DS(ON)
130mΩ (typ) High Side Switch R
DS(ON)
Low Quiescent Current:
— 1μA (max) DC
— 4mA at 1MHz
Only 2.5V Needed for Control Signal Input
Break-Before-Make Shoot-Through Protection
Temperature Range: -40°C to +85°C
5-Pin SOT23 or 8-Pin SC70JW Package
Applications
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DC Motor Drive
High Frequency DC/DC Converters
MOSFET Driver
Typical Application
DC/DC Converter Output Stage
2.0V to 5.5V Input
IN
Control Circuit
(PWM Output)
CLK
EN
AAT4900
SOT23
GND
OUTPUT
LX
ENABLE
4900.2006.05.1.3
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AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
