Ultra-Low-Noise 200mA/500mA LDO Regulator
The RT9177/A is a 200mA/500mA low dropout and low
noise micro-power regulator suitable for portable RF
applications. The output voltage accuracy is within ±2%
and range from 2.4V to 3.2V in 100mV increments could
be selected. It is designed for using very low ESR output
capacitor. Its output remains stable even when using a
1μF ceramic as its output capacitor.
With an internal PMOS as the pass device, it does not
need extra GND current in heavy load and dropout
conditions. In shutdown mode, nearly zero operation
current makes the IC suitable for battery-power devices.
Other features including current limiting and over
temperature protection. The noise performance can be
improved by connecting a capacitor to the bypass pin.
z Ultra-Low-Noise (150nV/ Hz ) for RF Application
z 1μF Ceramic COUT Stable
z Low Dropout Voltage (220mV @ 200mA)
z Low Operation Current - 80μA Typical
z Shutdown Function
z Low Temperature Coefficient
z Current and Thermal Limiting
z Customized Voltage Available
z SOT-23-5 Package
z RoHS Compliant and 100% Lead (Pb)-Free
z Cellular Phones
z Laptop, Notebook, and Palmtop Computers
z Battery-powered Equipment
z Hand-held Equipment
B : SOT-23-5 (Type - I)
BR : SOT-23-5 (Type - II)
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
24 : 2.4V
25 : 2.5V
31 : 3.1V
32 : 3.2V
2H : 2.85V
500mA Output Current
200mA Output Current
EN 3 4 BP
SOT-23-5 (Type - I)
RichTek Pb-free products are :
−RoHS compliant and compatible with the current require-
VOUT 1 5 BP
ments of IPC/JEDEC J-STD-020.
−Suitable for use in SnPb or Pb-free soldering processes.
−100% matte tin (Sn) plating.
SOT-23-5 (Type - II)
DS9177/A-11 March 2005