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Processor Power-Up Sequencing
Processor Power-Up Sequencing
Laptop
Notebook
and Palmtop Computers
Low Dropout Voltage Regulator
Low Dropout Voltage Regulator
Up to 150mA Output Current
Power Good (PGOOD) Function
Chip Enable/Shutdown Function
Load Independent
Low Quiescent Current
160µA
Current Limiting and Thermal Protection
Under Voltage Lockout (UVLO)
Low Variation Due to Load and Line Regulation
Output Stable with Low ESR Capacitors
SOT-23-5 Package
RoHS Compliant and 100% Lead (Pb)-Free
150mA LDO Regulator with PGOOD
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 P-MOSFET as the pass device, which consumes 160µA ,supply current independent of load and dropout conditions. The EN pin controls ,the output and consumes no input bias current. Other features include current ,limiting, over temperature protection, and under voltage lockout.,,
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