RT9172 Datasheet, PDF (1/16 Pages) Richtek Technology Corporation – 3A FIXED OUTPUT VOLTAGE LDO REGULATOR

Preliminary
RT9172
3A Fixed Output Voltage LDO Regulator
General Description
The RT9172 series of low-dropout linear regulators
operate from a +2.25V to +6.0V input supply. A wide
range of preset output voltage options is available.
These low dropout linear regulators respond very
fast to step changes in load, which are suitable for
low voltage microprocessor applications. The
RT9172 uses an internal PMOS as the pass device,
which does not cause extra GND current in heavy
load and dropout condition. The shutdown mode of
low operation current makes the IC suitable for
power-saving systems. The other features include
current limiting and over temperature protection.
Ordering Information
RT9172…-…… … …
Package type
T5 : TO-220-5
M5 : TO-263-5
T : TO-220
M : TO-263
G : SOT-223
Operating temperature range
C: Commercial standard
Output voltage
15 : 1.5V
16 : 1.6V
:
32 : 3.2V
33 : 3.3V
S: Pin out exchange
N : Pin 5 bond sense
F : Pin 5 bond flg
Features
z Low Dropout Voltage
z Low Ground Pin Current
z Load Regulation of 0.4% at 3A
z 0.5µA Quiescent Current in Shutdown Mode
z Guaranteed Output Current of 3A DC
z Available in TO-263 and TO-220 Packages
z Output Voltage Accuracy ±1.5%
z Error Flag Indicates Output Status
z Sense Option Improves Better Load Regulation
z Extremely Low Output Capacitor Requirements
z Over-temperature/Over-current Protection
Applications
z Microprocessor Power Supplies
z GTL, GTL+, BTL, and SSTL Bus Terminators
z Power Supplies for DSPs
z SCSI Terminator
z Post Regulators
z High Efficiency Linear Regulators
z Battery Chargers
z Other Battery Powered Applications
Pin Configurations
Part Number
Pin Configurations
RT9172-……CT
(Plastic TO-220)
RT9172-……CM
(Plastic TO-263)
RT9172-……CG
(Plastic SOT-223)
123
123
123
TOP VIEW
1. VIN
2. GND (TAB)
3. VOUT
TOP VIEW
1. VIN
2. GND (TAB)
3. VOUT
TOP VIEW
1. VIN
2. GND (TAB)
3. VOUT
To be continued
DS9172-03 April 2002
www.richtek-ic.com.tw
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