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FEATURES Tri-Mode Operation 3.3 V, 5 V Fixed or +1.3 V to +16 V Adjustable Low Power CMOS: 9 µ A max Quiescent Current High Current 100 mA Output Low Dropout Voltage Upgrade for ADM663/ADM666 “Small” 0.1 µ F 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 GENERAL DESCRIPTION
Tri-Mode: +3.3 V, +5 V, Adjustable Micropower Linear Voltage Regulators ADM663A/ADM666A*
FUNCTIONAL BLOCK DIAGRAMS
VIN 0.5V 1.3V A1 C1 SENSE VOUT2 VOUT1
SHDN
D E C O D E R R1
C2
VIN–50mV VSET
C3 50mV
R2
0.9V
A2
VTC
R3 GND
ADM663A
The ADM663A/ADM666A are precision linear voltage regulators featuring a maximum quiescent current of 9 µA.