General Description

The RT9018A/B is a high performance positive voltage regulator designed for use in applications requiring very low Input voltage and very low dropout voltage at up to 3A(Peak). It operates with a VIN as low as 1.0V and VDD voltage 3V with output voltage programmable as low as 0.8V. The significant feature includes ultra low dropout, ideal for applications where VOUT is very close to VIN. Additionally, there is an enable pin to further reduce power dissipation while shutdown. The RT9018A/B provides excellent regulation over variations in line, load and temperature. and provides a power OK signal to indicate if the voltage level of Vo reaches 90 of its rating value.

Features

• Maximum 3A Low-Dropout Voltage Regulator

• High Accuracy Output Voltage ±1.5

• Typically 220mV Dropout at 3A

• Power Good Output

• Output Voltage Pull Low Resistance when Disable

• Thermal and Over Current Protection

• RoHS Compliant and 100 Lead (Pb)-Free

Applications

• Front Side Bus VTT (1.2V/3A)

• NoteBook PC Applications

• Motherboard Applications