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ADP1109

Analog Devices
Part Number ADP1109
Manufacturer Analog Devices
Description Micropower Low Cost Fixed 3.3 V/ 5 V/ 12 V and Adjustable DC-to-DC Converter
Published Mar 23, 2005
Detailed Description a FEATURES Operates at Supply Voltages 2 V to 12 V Fixed 3.3 V, 5 V, 12 V and Adjustable Output Minimum External Compone...
Datasheet PDF File ADP1109 PDF File

ADP1109
ADP1109

Overview
a 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 Micropower Low Cost Fixed 3.
3 V, 5 V, 12 V and Adjustable DC-to-DC Converter ADP1109 FUNCTIONAL BLOCK DIAGRAMS VIN SENSE R2 250k⍀ COMPARATOR 1.
25V REFERENCE + A1 120kHz OSCILLATOR DRIVER ADP1109-3.
3: R1 = 152k⍀ ADP1109-5: R1 = 83k⍀ ADP1109-12: R1 = 29k⍀ SW Q1 R1 GND SHUTDOWN Fixed Output VIN FB ADP1109 COMPARATOR 1.
25V REFERENCE + A1 120kHz OSCILLATOR DRIVER Q1 SW 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...


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