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ADP1109AN-12 Folha de dados(PDF) 1 Page - Analog Devices |
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ADP1109AN-12 Folha de dados(HTML) 1 Page - Analog Devices |
1 / 8 page 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 ADP1109 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998 Micropower Low Cost Fixed 3.3 V, 5 V, 12 V and Adjustable DC-to-DC Converter FUNCTIONAL BLOCK DIAGRAMS DRIVER SW VIN GND COMPARATOR A1 R1 SENSE R2 250k SHUTDOWN + ADP1109-3.3: R1 = 152k ADP1109-5: R1 = 83k ADP1109-12: R1 = 29k Q1 120kHz OSCILLATOR 1.25V REFERENCE Fixed Output DRIVER SW VIN GND COMPARATOR A1 FB SHUTDOWN + ADP1109 Q1 120kHz OSCILLATOR 1.25V REFERENCE Adjustable Output FEATURES Operates at Supply Voltages 2 V to 12 V Fixed 3.3 V, 5 V, 12 V and Adjustable Output Minimum External Components Required Ground Current: 320 A Oscillator Frequency: 120 kHz Logic Shutdown 8-Lead DIP and SO-8 Packages APPLICATIONS Cellular Telephones Single-Cell to 5 V Converters Laptop and Palmtop Computers Pagers Cameras Battery Backup Supplies Portable Instruments Laser Diode Drivers Hand-Held Inventory Computers GENERAL DESCRIPTION The ADP1109 is a versatile step-up switching regulator. The device requires only minimal external components to operate as a complete switching regulator. The ADP1109-5 can deliver 100 mA at 5 V from a 3 V input and the ADP1109-12 can deliver 60 mA at 12 V from a 5 V input. The device also features a logic controlled shutdown capability that, when a logic low is applied, will shut down the oscillator. The 120 kHz operating frequency allows for the use of small surface mount components. The gated oscillator capability eliminates the need for frequency compensation. TYPICAL APPLICATION SW GND ADP1109-12 + D1 C1 22 F 16V SENSE L1 33 H VIN 5V VIN SHUTDOWN SHUTDOWN/PROGRAM VOUT 12V 60mA Flash Memory VPP Generator |
Nº de peça semelhante - ADP1109AN-12 |
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Descrição semelhante - ADP1109AN-12 |
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