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ST763A Datasheet(PDF) 1 Page - STMicroelectronics

Part No. ST763A
Description  3.3V STEP DOWN CURRENT MODE PWM DC-DC CONVERTERS
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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1/10
November 2000
s
OUTPUT VOLTAGE 3.3V
s
SUPPLY VOLTAGE RANGE FROM 3.3V TO
11V
s
GUARANTEED OUTPUT CURRENT: 500mA
s
TYPICAL OPERATION FREQUENCY:
200KHz
s
VERY LOW QUIESCENT CURRENT: 0.6mA
ON MODE 0.2
µA OFF MODE
s
SWITCH ON/OFF CONTROL
s
TYPICAL EFFICENCY: 90%
s
OPERATING TEMPERATURE RANGE:
-40°C TO 85°C
s
AVAILABLE IN SO-8 AND DIP-8 PACKAGES
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 0.2
µA 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
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 ddevice are cycle-by-clicle
current limiting, overcurrent limiting, under voltage
lockout and programmable soft-start protection.
A 22
µH inductor works in most applications, so no
sophisticated design is necessary.
Package available are SO-8 and DIP-8.
Typical application are in 5V to 3.3V converters,
cellular phones, portable instruments, hand-held
computers, and peripherals.
ST763A
SERIES
3.3V STEP DOWN
CURRENT MODE PWM DC-DC CONVERTERS
SCHEMATIC DIAGRAM
DIP-8
SO-8




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