ST763A_07 Datasheet, PDF (1/14 Pages) STMicroelectronics – 3.3V Step down current mode PWM DC-DC converters

ST763A series
3.3V Step down current mode PWM DC-DC converters
Features
■ Output voltage 3.3V
■ Supply voltage range from 3.3V to 11V
■ Guaranteed output current: 500mA
■ Typical operation frequency: 200KHz
■ Very low quiescent current: 0.6mA on mode
0.2µA OFF MODE
■ Switch ON/OFF control
■ Typical efficiency: 90%
■ Operating temperature range: -40°C to 85°C
■ Available in SO-8 package
Description
The ST763A is a step-down switching regulator. It
operates from 3.3V to 11V giving a fixed 3.3V
output voltage, delivering up to 500mA. The
mainly features are typical efficiency of 90%,
quiescent current of 0.6mA, and only 0.2µA in
shut-down.
The PWM current mode control provides precise
output regulation and very good transient
response. Output voltage accuracy is guaranteed
to be ±5% over line, load and temperature
SO-8
variations. A minimum number of external
components is used and the fixed frequency
switching allows easy filtering of output ripple and
noise.
Other features of this device are cycle-by-cycle
current limiting, overcurrent limiting, under voltage
lockout and programmable soft-start protection.
A 22µH inductor works in most applications, so no
sophisticated design is necessary.
Package available is SO-8.
Typical application are in 5V to 3.3V converters,
cellular phones, portable instruments, hand-held
computers, and peripherals.
Order code
Part number
ST763AC
May 2007
Rev. 3
Packaging
ST763ACDTR
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