150mA LDO Regulator with PGOOD

RT9181

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.

Applications

Processor Power-Up Sequencing
Laptop, Notebook, and Palmtop Computers

Key Spec.

	RT9181
Status	Active
Vin (min) (V)	3
Vin (max) (V)	5.5
Vout (min) (V)	1.2
Vout (max) (V)	1.8
Output Adj. Method	Fixed
Accuracy (+/- %)	2
Iout (max) (mA)	150
Iq (typ) (uA)	160
Cout Type	Ceramic
Features	Enable Input;Low Dropout;OCP;Output Discharge;Power Good;Stable with Ceramic Capacitor
Package Type	SOT-25

Features

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

Datasheet

DS9181-16.pdf

Datasheet

DS9181-16.pdf