RT9170
300mA, 15μA Quiescent Current CMOS LDO Regulator
μ
General Description
The RT9170 is CMOS ultra low quiescent current and low
dropout (ULDO) regulators. The devices are capable of
supplying 300mA of output current continuously.
The RT9170's performance is optimized for battery-
powered systems to deliver 15μA ultra low quiescent
current and extremely low dropout voltage. Regulator
ground current increases only slightly in dropout, further
prolonging the battery life. The other features include ultra
low dropout voltage, high output accuracy, current limiting
protection, and high ripple rejection ratio.
The devices are available in fixed output voltages range of
1.2V to 3.3V with 0.1V per step. The RT9170 regulators
are available in
SOT-23-3, SOT-23-5
and 3-lead SOT-89
packages.
Features
μ
Ultra-Low Quiescent Current (Typically 15μA)
Guaranteed 300mA Output Current
Low Dropout : 240mV at 300mA
Wide Operating Voltage Ranges : 2V to 5.5V
Fast Transient Response
Tight Load and Line Regulation
TTL-Logic-Controlled Enable Input
Current Limiting & Thermal Protection
Only 1μF Output Capacitor Required for Stability
μ
High Power Supply Rejection Ratio
Custom Voltage Available
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Cellular Phones and Pagers
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
Ordering Information
RT9170-
Package Type
V: SOT-23-3
B: SOT-23-5
X : SOT-89
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage
12 : 1.2V
13 : 1.3V
:
32 : 3.2V
33 : 3.3V
Pin Configurations
(TOP VIEW)
VIN
3
1
GND
2
EN
5
1
VOUT
NC
4
2
3
GND
VIN VOUT
SOT-23-3
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.
1
2
3
SOT-23-5
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
DS9170-11 March 2007
GND
VIN VOUT
(TAB)
SOT-89
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
