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RT9167/A
DS9167/A-10 July 2001 www.richtek-ic.com.tw
1
Low-Noise, Fixed Output Voltage,
200mA/500mA LDO Regulator
General Description
The RT9167/A is a 200mA/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 and 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-power devices. Other features
include a reference bypass pin to improve low noise
performance, current limiting, and over temperature
protection.
Ordering Information
RT9167/A-
Features
z
Stable with Low-ESR Output Capacitor
z
Low Dropout Voltage (220mV and 200mA)
z
Low Operation Current - 80µ
µµ
µA Typical
z
Shutdown Function
z
Low Noise Output
z
Low Temperature Coefficient
z
Current and Thermal Limiting
z
Custom Voltage Available
z
SOT-25 and SOP-8 Packages
Applications
z
Cellular Telephones
z
Laptop, Notebook, and Palmtop Computers
z
Battery-powered Equipment
z
Hand-held Equipment
Pin Configurations
Part Number Pin Configurations
RT9167/A-
CB
(Plastic SOT-25)
TOP VIEW
1. IN
2. GND
3. SHDN
4. BP
5. OUT
RT9167/A-
CBR
(Plastic SOT-25)
TOP VIEW
1. OUT
2. GND
3. IN
4. SHDN
5. BP
RT9167/A-CS
(Plastic SOP-8)
TOP VIEW
Operating temperature range
C: Commercial standard
Package type
B : SOT-25 Type I
BR : SOT-25 Type II
S : SOP-8
Output voltage
15 : 1.5V
16 : 1.6V
:
:
49 : 4.9V
50 : 5.0V
500mA Output current
200mA Out
p
ut current
54
321
54
321
SHDN
IN
OUT
BP
1
2
3
4
8
7
6
5
GND
GND
GND
GND
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