Analog Devices Micropower, Step-Up/Step-Down SW Regulator Fixed 12V

Manufactured by Analog Devices - DIP8 Package - Part # ADP1111-A12

FEATURES

• Operates from 2 V to 30 V Input Voltage Range
• 72 kHz Frequency Operation
• Utilizes Surface Mount Inductors
• Very Few External Components Required
• Operates in Step-Up/Step-Down or Inverting Mode
• Low Battery Detector
• User Adjustable Current Limit
• Internal 1 A Power Switch
• Fixed Output Voltage
• 8-Pin DIP

APPLICATIONS

Laptop and Palmtop Computers
Cellular Telephones
Flash Memory VPP Generators
Remote Controls
Peripherals and Add-On Cards
Battery Backup Supplies
Uninterruptible Supplies
Portable Instruments

GENERAL DESCRIPTION

The ADP1111 is part of a family of step-up/step-down switching regulators that operates from an input voltage supply of 2V to 12 V in step-up mode and up to 30 V in step-down mode.

The ADP1111 can be programmed to operate in step-up/stepdown or inverting applications with only 3 external components.
The fixed outputs are 3.3 V, 5 V and 12 V; and an adjustable version is also available. The ADP1111 can deliver 100 mA at 5 V from a 3 V input in step-up mode, or it can deliver 200 mA at 5V from a 12V input in step-down mode.

Maximum switch current can be programmed with a single resistor, and an open collector gain block can be arranged in multiple configuration for low battery detection, as a post linear regulator, undervoltage lockout, or as an error amplifier.