RT9167/A
Low-Noise, Fixed Output Voltage,300mA/500mA LDO Regulator
General Description
The RT9167/A is a 300mA/500mA low dropout and low
noise micropower regulator suitable for portable
applications. The output voltages range from 1.5V to 5.0V
in 100mV increments and 2% accuracy. The RT9167/A is
designed for use with very low ESR capacitors. The output
remains stable even with 1μF ceramic output capacitor.
The RT9167/A uses
an internal PMOS as the pass device,
which does not cause extra GND current in heavy load
and dropout conditions. The shutdown mode of nearly zero
operation current makes the IC suitable for battery-powered
devices. Other features include a reference bypass pin to
improve low noise performance, current limiting, and over
temperature protection.
Features
Stable with Low-ESR Output Capacitor
Low Dropout Voltage (350mV @ 300mA)
Low Operation Current
−
80μA Typical
μ
Shutdown Function
Low Noise Output
Low Temperature Coefficient
Current and Thermal Limiting
Custom Voltage Available
SOT-23-5
and SOP-8 Packages
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
Battery-powered Equipment
Hand-held Equipment
Ordering Information
RT9167/A-
Package Type
Marking Information
B : SOT-23-5
For marking information, contact our sales representative
BR : SOT-23-5 (R-Type)
S : SOP-8
directly or through a RichTek distributor located in your
Operating Temperature Range
area, otherwise visit our website for detail.
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
Pin Configurations
cial Standard)
Output Voltage
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
2H : 2.85V
500mA Output Current
300mA Output Current
Note :
RichTek Pb-free and Green 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.
100%matte tin (Sn) plating.
SOP-8
EN
VIN
VOUT
BP
2
3
4
8
7
6
5
GND
GND
GND
GND
(TOP VIEW)
VIN
GND
EN
1
2
3
5
VOUT
VOUT
GND
1
2
3
5
BP
4
BP
VIN
4
EN
SOT-23-5
SOT-23-5
(R-Type)
DS9167/A-26 March 2007
www.richtek.com
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