Features: Tri-Mode Operation 3.3 V, 5 V Fixed or +1.3 V to +16 V Adjustable
Low Power CMOS: 9 mA max Quiescent Current High Current 100 mA
Output Low Dropout Voltage Upgrade for ADM663/ADM666 "Small"
0.1 mF Output Capacitor (0805 Style) +2 V to +16.5 V Operating Range
Low Battery Detector ADM666A No Overshoot on Power-Up Thermal
Shutdown
ApplicationHandheld Instruments LCD Display Systems
Pagers Battery Operated EquipmeSpecifications
(TA = +25°C unless otherwise noted)
Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18 V Terminal Voltage
(ADM663A) Pins 1, 3, 5, 6, 7. . . . . . . . . . . ...........(GND 0.3 V) to (VIN + 0.3 V)
(ADM666A) Pins 1, 2, 3, 5, 6. . . . . . . . . . . . . . . . .(GND 0.3 V) to (VIN + 0.3 V)
(ADM663A) Pin 2 . . . . . . . ..............................(GND 0.3 V) to (VOUT1 + 0.3 V)
(ADM666A) Pin 7 . . . . . . . . . . . . . .... ..........................(GND 0.3 V) to +16.5 V
Output Source Current
(ADM663A, ADM666A) Pin 2 . . . . . . . . . . . . . . . . . . ................................100 mA
(ADM663A) Pin 3 . . . . . . . . . . . . . . . . . . . . . . . . . .....................................25 mA
Output Sink Current, Pin 7 . . . . . . . . . . . . . . . . . . . ...............................20 mA
Power Dissipation, N-8 . . . . . . . . . . . . . . . . . . . . . .................................800 mW
(Derate 8.3 mW/°C above +30°C)
qJA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . ..............................120°C/W
Power Dissipation, R-8 . . . . . . . . . . . . . . . . . . . . . ..................................570 mW
(Derate 6 mW/°C above +30°C)
qJA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . .............................170°C/W
Operating Temperature Range
Industrial (A Version) . . . . . . . . . . . . . . . . ................................40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . ...........................65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . .... .........................+300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . ....................................+215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . .......................................+220°C
DescriptionThe ADM663A/ADM666A are precision linear voltage regulators featuring a maximum quiescent current of 9 mA. 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.
The ADM663A/ADM666A feature additional low battery monitoring circuitry to detect for low battery voltages.
The ADM663A/ADM666A are pin compatible enhancements for the ADM663/ADM666. Improvements include an additional 3.3 V output range, higher output current, and operation with a small output capacitor.
The ADM663A/ADM666A are available in an 8-pin DIP and narrow surface mount (SOIC) packages.
ADM666A Data Sheet
