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RT9181CB Datasheet

  • RT9181CB

  • 150MA LDO REGULATOR WITH POG

  • 201.55KB

  • 10頁

  • ETC

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Preliminary
RT9181
150mA LDO Regulator with POG
General Description
The RT9181 is a low dropout voltage regulator with
an output 2% accuracy and supply a continuous
150mA current within operating range from a +3V to
+5.5V input. The power good function monitors the
output voltage and indicates by pulling low the power
good output (open drain).
The RT9181 requires a small output capacitor with
low ESR for stabilizing output voltage. The device
also minimizes output overshoot during power up.
The RT9181 uses an internal PMOS as the pass
device, which consumes 160碌A supply current
independent of load and dropout conditions. The CE
pin controls the output and consumes no input bias
current. Other features include current limiting, over
temperature protection, and under voltage lockout.
Features
Low Dropout Voltage Regulator, Output 1.2V
Up to 150mA Output Current
Power Good (POG) Function
Chip Enable/Shutdown Function
Load Independent, Low Ground Current, 160碌A
碌
Current Limiting and Thermal Protection
Under Voltage Lockout (UVLO)
Low Variation Due to Load and Line Regulation
Output Stable with Low ESR Capacitors
SOT-25 Package
Pin Configurations
Part Number
RT9181CB
(Plastic SOT-25)
5
4
Pin Configurations
TOP VIEW
Applications
Processor Power-Up Sequencing
Laptop, Notebook, and Palmtop Computers
1
2
3
1.
2.
3.
4.
5.
VIN
GND
CE
POG
VOUT
Ordering Information
RT9181
Package type
B : SOT-25
Operating temperature range
C: Commercial standard
Typical Application Circuit
10K
V
IN
C
IN
1碌F
CE
ON
OFF
VOUT
GND
V
OUT
C
OUT
1碌F
VIN
POG
POG
DS9181-00 February 2002
www.richtek-ic.com.tw
1

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