ADP1111

PRODUCTION

Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V

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Overview

  • 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 or Adjustable Output Voltage
  • 8-Pin DIP or SO-8 Package

The ADP1111 is part of a family of step-up/step-down switching regulators that operates from an input voltage supply of 2 V 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 5 V from a 12 V 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.

APPLICATIONS

  • 3 V to 5 V, 5 V to 12 V Step-Up Converters
  • 9 V to 5 V, 12 V to 5 V Step-Down Converters
  • Laptop and Palmtop Computers
  • Cellular Telephones
  • Flash Memory VPP Generators
  • Remote Controls
  • Peripherals and Add-On Cards
  • Battery Backup Supplies
  • Uninterruptible Supplies
  • Portable Instruments

ADP1111
Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
adp1111 typical application circuit ADP1111 Functional Block Diagram
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