FT440 Datasheet, PDF (1/10 Pages) List of Unclassifed Manufacturers – 1.5MHz, 600mA Synchronous Step-Down Converter

Fremont Micro Devices
FT440
1.5MHz, 600mA Synchronous Step-Down Converter
FEATURES
 High Efficiency - Up to 95%
 Guaranteed 600mA Output Current
 2.5V to 5.5V Input Voltage Range
 1.5MHz Constant Frequency Operation
 No external Schottky Diode Needed
 Adjustable Output Voltages From 0.6V to VIN
 Fixed Output Voltage Options Available
 100% Duty Cycle Low-Dropout Operation
 0.1μA Shutdown Current
 SOT23-5 Package
TYPICAL APPLICATIONS
 Cellular phones
 Blue Tooth Headsets
 Portable Audio Players
 Mobile Phones
 Wireless and DSL Modems
 Digital Still Cameras
 Portable Instruments
 Mp3 Player
DESCRIPTION
The FT440 is a 1.5MHz constant frequency, slope
compensated current mode step down converter.
Capable of delivering 600mA output current over a
wide input voltage from 2.5V to 5.5V, the FT440 is
ideally suited for single Li-Ion battery powered
application.
The FT440 integrates a main switch and a
synchronous rectifier for high efficiency without an
external Schottky diode. The FT440 automatically
turns off the synchronous rectifier to increase
efficiency while enters discontinuous PWM mode.
The FT440 can run at 100% duty cycle for low
dropout operation, maximizing battery life in portable
application. FT440 consumes less than 1uA when
enter shutdown mode.
The FT440 is available in a fixed output voltages of
1.5V, 1.8V, and 2.5V, and is also available in an
adjustable output voltage version capable of
generating output voltages from 0.6V to VIN .The
FT440 is available in a 5-pin SOT23-5 package.
www.fremontmicro.com
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DS440-A3