DESCRIPTION
The LT1108 is a versatile micropower DC/DC converter. The device requires only four external components to deliver a fixed output of 5V or 12V. Supply voltage ranges from 2V to 12V in step-up mode and to 30V in step-down mode. The LT1108 functions equally well in step-up, stepdown, or inverting applications.

FEATURES
■ Operates at Supply Voltages from 2V to 30V
■ Consumes Only 110µA Supply Current
■ Works in Step-Up or Step-Down Mode
■ Only Four External Components Required
■ Low Battery Detector Comparator On-Chip
■ User Adjustable Current Limit
■ Internal 1A Power Switch
■ Fixed or Adjustable Output Voltage Versions
■ Space Saving 8-Pin MiniDIP or S8 Package

APPLICATIONS
■ Palmtop Computers
■ 3V to 5V, 5V to 12V Converters
■ 9V to 5V, 12V to 5V Converters
■ LCD Bias Generators
■ Peripherals and Add-On Cards
■ Battery Backup Supplies
■ Cellular Telephones
■ Portable Instruments