RT9177 Datasheet, PDF (1/12 Pages) List of Unclassifed Manufacturers – Ultra-Low-Noise 200mA LDO Regulator

Preliminary
RT9177
Ultra-Low-Noise 200mA LDO Regulator
General Description
The RT9177 is a 200mA low dropout and low noise
micro-power regulator suitable for portable RF
applications. The output voltage accuracy 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 in using 1µF ceramic as its
output capacitor.
Using an internal PMOS as the pass device cause
that don’t need extra GND current in heavy load and
dropout conditions. In shutdown mode, nearly zero
operation current cause the IC is suitable for
battery-power devices. Other features including
current limiting, over temperature protection and
adding a capacitor in bypass pin to improve its noise
performance are functional.
Ordering Information
RT9177-…… … ……
Package type
B : SOT-25 Type I
BR : SOT-25 Type II
Operating temperature range
C: Commercial standard
Output voltage
24 : 2.4V
25 : 2.5V
:
:
31 : 3.1V
32 : 3.2V
Features
z Ultra-Low-Noise(150nV/ Hz ) for RF Application
z 1µF Ceramic C_OUT 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 Custom Voltage Available
z SOT-25 Package
Applications
z Cellular Telephones
z Laptop, Notebook, and Palmtop Computers
z Battery-powered Equipment
z Hand-held Equipment
Pin Configurations
Part Number
Pin Configurations
RT9177-……CB
(Plastic SOT-25)
5
4
TOP VIEW
1 23
1. IN
2. GND
3. SHDN
4. BP
5. OUT
RT9177-……CBR
(Plastic SOT-25)
5
4
TOP VIEW
1 23
1. OUT
2. GND
3. IN
4. SHDN
5. BP
Typical Application Circuit
V_IN
C_IN
1µF
ON
OFF
RT9177
IN OUT
GND
SHDN
C_OUT
1µF
V_{OU T}
C_BP
10nF
DS9177-00 Feb. 2001
www.richtek-ic.com.tw
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