RT9161/A
300/500mA Low Dropout Linear Voltage Regulator
General Description Features
zz z zz Low Dropout Voltage of 200mV at Output Current
The RT9161/A is a 300/500mA fixed output voltage low
100mA, 450mV at Output Current 300mA, and
dropout linear regulator. Typical ground current is
750mV at 500mA Output Current
approximately 110A, from zero to maximum loading
zz z zz Guaranteed 300/500mA Output Current
conditions. Wide range of available output voltage fits most
zz z zz Internal 1.5 P-MOSFET Draws No Base Current
of applications. Built-in output current-limiting most
zz z zz Low Ground Current 110A
thermal-limiting provide maximal protection against any
zz z zz 2% Accuracy Output Voltage
fault conditions.
zz z zz Input Voltage Range up to 12V
For ease of application, the RT9161/A comes in the popular
zz z zz Extremely Tight Load Regulation
3-pin SOT-23 (300mA), SOT-89 (300mA), SOT-223
zz z zz Fast Transient Response
(500mA), or TO-92 packages.
zz z zz Current-limiting and Thermal-limiting
zz z zz RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9161/A-
Applications
z Voltage Regulator for LAN Card, CD-ROM, and DVD
Package Type
z Wireless Communication Systems
V : SOT-23-3
X : SOT-89
z Battery Powered Systems
G : SOT-223
ZL : TO-92 (L-Type)
Marking Information
ZT : TO-92 (T-Type)
For marking information, contact our sales representative
Lead Plating System
P : Pb Free
directly or through a Richtek distributor located in your
G : Green (Halogen Free and Pb Free)
area.
Output Voltage
15 : 1.5V
Pin Configurations
16 : 1.6V
:
(TOP VIEW)
49 : 4.9V
50 : 5.0V
VIN
500mA Output Current
3
300mA Output Current
12 3
Note :
2
Richtek products are :
GND VOUT
` RoHS compliant and compatible with the current require- GND VIN VOUT
SOT-23-3
(TAB)
ments of IPC/JEDEC J-STD-020.
SOT-89
` Suitable for use in SnPb or Pb-free soldering processes.
1 2 3
GND VIN VOUT
(TAB)
SOT-223
DS9161/A-35 April 2011 www.richtek.com
1+
+
+
RT9161/A
3 VOUT 3 VOUT
2 GND 2
VIN
1VIN 1 GND
TO-92 (L-Type) TO-92 (T-Type)
Typical Application Circuit
RT9161/A
VIN VOUT V
V
IN OUT
C C
IN
OUT
GND
1uF 10uF
Electrolytic
Functional Pin Description
Pin Name Pin Function
VOUT Output Voltage.
GND Ground.
VIN Power Input.
Function Block Diagram
VIN VOUT
Error Amp
Current
Limiting
Sensor -
Thermal
1.2V
Shutdown
Reference
GND
www.richtek.com DS9161/A-35 April 2011
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