Dual, Ultra-Low Quiescent, 100mA CMOS LDO Regulator
The RT9188 series are an efficient, precise dual-channel
CMOS LDO regulator optimized for ultra-low-quiescent
applications. Both regulator outputs are capable of
sourcing 100mA of output current.
The RT9188's performance is optimized for battery-
powered systems to deliver extremely low dropout
voltage and ultra-low quiescent current. Regulator ground
current increases only slightly in dropout, further
prolonging the battery life. The RT9188 also works with
low-ESR ceramic capacitors, reducing the amount of
board space necessary for power applications, critical in
hand-held wireless devices.
Key features include current limit, thermal shutdown,
faster transient response, ultra-low quiescent current
(typically 8µA), low dropout voltage, high output accuracy,
current limiting protection, and high ripple rejection ratio.
Available in the SOT-23-5 package, the RT9188 also offers
a range of 1.2V to 5V with 0.1V per step.
B : SOT-23-5
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
Output Voltage 2
8 : 1.8V
Output Voltage 1
K : 3.0V
Other Voltage versions please
contact RichTek for detail
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.
l Ultra-Low Quiescent Current (Typically 8µA)
l Low Dropout : 450mV at 100mA
l Wide Operating Voltage Ranges : 2V to 6V
l Faster Transient Response
l Tight Load and Line Regulation
l Current Limiting Protection
l Thermal Shutdown Protection
l Only 1µF Output Capacitor Required for Stability
l High Power Supply Rejection Ratio
l Custom Voltages Available
l RoHS Compliant and 100% Lead (Pb)-Free
l Cellular Phones and Pages
l Battery-Powered Equipment
l Laptop, Palmtops, Notebook Computers
l Hand-Held Instruments
l PCMCIA Card
l Wireless LAN Card/Keyboard/Mouse
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
VOUT1 1 5 GND
NC 3 4 VOUT2
DS9188-08 March 2007