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RT9172 Datasheet Preview

RT9172 Datasheet

3A Fixed Output Voltage LDO Regulator

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®
RT9172
3A Fixed Output Voltage LDO Regulator
General Description
Features
The RT9172 series of low dropout linear regulators operate
from a 2.25V to 6V 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 P-MOSFET 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.
Low Dropout Voltage
Low Ground Pin Current
Load Regulation of 0.4% at 3A
0.5mA Quiescent Current in Shutdown Mode
Guaranteed Output Current of 3A DC
Available in TO-263 and TO-220 Packages
Output Voltage Accuracy ±1.5%
Error Flag Indicates Output Status
Sense Option Improves Better Load Regulation
Extremely Low Output Capacitor Requirements
Over Temperature/Over- Current Protection
RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9172 -
Applications
Package Type
T5 : TO-220-5
M5 : TO-263-5
Microprocessor Power Supplies
GTL, GTL+, BTL, and SSTL Bus Terminators
Power Supplies for DSPs
T : TO-220
SCSI Terminator
M : TO-263
G : SOT-223
S : SOP-8
Lead Plating System
P : Pb Free
Post Regulators
High Efficiency Linear Regulators
Battery Chargers
Other Battery Powered Applications
G : Green (Halogen Free and Pb Free)
Output Voltage
1.5V to 3.3V
Pin Configurations
(TOP VIEW)
(with 0.1V per step)
S : Pin Out Exchange
N : Pin 5 bond SENSE
F : Pin 5 bond FLG
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
TO-220
1 23
VIN GND VOUT
(TAB)
TO-263
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
123
VIN GND VOUT
(TAB)
SOT-223
VOUT
SENSE
GND
NC
8
27
36
45
SOP-8
VIN
GND
GND
EN
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS9172-18 August 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1




Richiek

RT9172 Datasheet Preview

RT9172 Datasheet

3A Fixed Output Voltage LDO Regulator

No Preview Available !

RT9172
5
4
3
2
1
TO-220-5
RT9172N- xT5
RT9172F- xT5
SENSE/FLG
VOUT
GND (TAB)
VIN
EN
5
4
3
2
1
TO-220-5
RT9172S- xT5
VOUT
SENSE
GND (TAB)
EN
VIN
5 SENSE/FLG
4 VOUT
3 GND (TAB)
2 VIN
1 EN
TO-263-5
RT9172N- xM5
RT9172F- xM5
5 VOUT
4 SENSE
3 GND (TAB)
2 EN
1 VIN
TO-263-5
RT9172S- xM5
Functional Pin Description
Pin No.
RT9172F
1
RT9172N
1
RT9172S
2
RT9172-
RT9172-
RT9172-
--
221
1
333
2
445
3
5 -- --
--
-- 5 4
--
xT
Pin Name
xM
xG
EN
Pin Function
Chip Enable. (Active Hight)
VIN Power Input Voltage.
GND
Ground.
VOUT
Output Voltage.
FLG ERROR Flag.
SENS E
Remote Sense.
Typical Application Circuit
VIN = 3.3V
CIN
10uF
RT9172-25
VIN VOUT
GND
VOUT
2.5V, 3A
COUT
Figure 1
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS9172-18 August 2013


Part Number RT9172
Description 3A Fixed Output Voltage LDO Regulator
Maker Richiek
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RT9172 Datasheet PDF






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