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ADM663AAR Arkusz danych(PDF) 1 Page - Analog Devices |
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ADM663AAR Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 9 page One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a Tri-Mode: +3.3 V, +5 V, Adjustable Micropower Linear Voltage Regulators ADM663A/ADM666A* 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 GENERAL DESCRIPTION The ADM663A/ADM666A are precision linear voltage regula- tors 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 au- tomatically selected via the VSET input. The low quiescent cur- rent makes these devices especially suitable for battery powered systems. The input voltage range is 2 V to 16.5 V, and an out- put 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 ADM666A features additional low battery monitoring cir- cuitry to detect for low battery voltages. The ADM663A/ADM666A are pin compatible enhancements for the ADM663/ADM666. Improvements include an addi- tional 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. *Patent pending. FUNCTIONAL BLOCK DIAGRAMS 50mV V IN ADM663A SHDN GND V TC V SET V OUT1 V OUT2 SENSE C2 1.3V 0.5V C1 A2 A1 C3 D E C O D E R V IN–50mV 0.9V R2 R1 R3 50mV V IN ADM666A SHDN GND LBO V SET V OUT SENSE C2 1.3V 0.5V C1 C4 A1 C3 D E C O D E R V IN–50mV 1.3 V LBI R2 R1 R3 |
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