Voltage Regulator. GS5256 Datasheet

GS5256 Regulator. Datasheet pdf. Equivalent

Part GS5256
Description 150KHz 3A Step-Down Voltage Regulator
Feature 150KHz 3A Step-Down Voltage Regulator Product Description The GS5256 series regulators are monolith.
Manufacture Globaltech
Datasheet
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150KHz 3A Step-Down Voltage Regulator Product Description T GS5256 Datasheet
Recommendation Recommendation Datasheet GS5256 Datasheet





GS5256
150KHz 3A Step-Down Voltage Regulator
Product Description
The GS5256 series regulators are monolithic
integrated circuits that provide all the active
functions for a step-down switching regulator;
capable of driving a 3A load with excellent line and
load regulation. These devices are available in
fixed output voltages of 3.3V, 5V and an adjustable
output version.
Requiring a minimum number of external
components, these regulators are simple to use
and include internal frequency compensation, and
a fixed-frequency oscillator.
The GS5256 series operates at a switching
frequency of 150 kHz thus allowing smaller sized
filter components than what would be needed with
lower frequency switching regulators. Available in
a standard 5-lead TO-220 package and a 5-lead
TO-263 surface mount package.
A standard series of inductors are optimized for
use with the GS5256 series. This feature greatly
simplifies the design of switch-mode power
supplies.
Other features include a guaranteed ±4%
tolerance on output voltage under specified input
voltage and output load conditions, and ±15% on
the oscillator frequency. External shutdown is
included, featuring typically 80μA standby current.
Self-protection features include a two stage
frequency reducing current limit for the output
switch and an over temperature shutdown for
complete protection under fault conditions.
Features
3.3V, 5V and adjustable output versions
Adjustable version output voltage range,
1.2V to 37V
±4% max over line and load conditions
Guaranteed 3A output load current
Requires only 4 external components
Excellent line and load regulation
specifications
150kHz fixed frequency internal oscillator
TTL shutdown capability
Low power standby mode, IQ typically 80μA
High efficiency
Uses readily available standard inductors
Thermal shutdown and current limit
protection
Available in TO-220-5 and TO-263-5
packages
RoHS Compliant, 100%Pb & Halogen Free
Applications
Efficient pre-regulator for linear regulator
Simple high-efficiency step-down regulator
On-card switching regulators
Positive to negative converter
Block Diagram
CURRENT
SOURCE
BIAS
1.235V
REFERENCE
2.5V
REGULATOR
START
UP
ON/OFF
220mV
COMP
220mV
VIN
2.5V
FEEDBACK
R2
GM
AMP
R1=2.5k
ACTIVE
CAPACITOR
OP AMP
COMP
COMP
LATCH
DRIVER
FREQ SHIFT
150kHz
OSC
RESET
THERMAL
LIMIT
3A
SWITCH
OUTPUT
GND
www.gs-power.com 1



GS5256
Packages & Pin Assignments
GS5256TF (TO-220-5)
GS5256MF (TO-263-5)
TAB
1 Input
2 Output
3 Ground
4 Feedback
5 ON/OFF
Ordering Information
12 345
1 Input
2 Output
3 Ground
4 Feedback
5 ON/OFF
*For other voltages, please contact factory.
TO-220
GS5256TF
GS5256T33F
GS5256T50F
Package Type
TO-263
GS5256MF
GS5256M33F
GS5256M50F
Marking Information
Output Voltage
ADJ
3.3V
5.0V
www.gs-power.com
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