GENERAL DESCRIPTION
The ADM663A/ADM666A are precision linear voltage regulators featuring a maximum quiescent current of 9 µA. They can be used to give a fixed +3.3 V or +5 V output with no additional external components or can be adjusted from 1.3 V to 16 V using two external resistors. Fixed or adjustable operation is automatically selected via the VSET input. The low quiescent current makes these devices especially suitable for battery powered systems. The input voltage range is 2 V to 16.5 V, and an output current up to 100 mA is provided. Current limiting may be set using a single external resistor. For additional safety, an internal thermal shutdown circuit monitors the internal die temperature.

FEATURES
    Tri-Mode Operation
        3.3 V, 5 V Fixed or +1.3 V to +16 V Adjustable
    Low Power CMOS: 9 µA max Quiescent Current
    High Current 100 mA Output
    Low Dropout Voltage
    Upgrade for ADM663/ADM666
    “Small” 0.1 µF Output Capacitor (0805 Style)
    +2 V to +16.5 V Operating Range
    Low Battery Detector ADM666A
    No Overshoot on Power-Up
    Thermal Shutdown

APPLICATIONS
    Handheld Instruments
    LCD Display Systems
    Pagers
    Battery Operated Equipment