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 or Adjustable Output Voltage 8-Pin DIP or SO-8 Package 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 GENERAL DESCRIPTION
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. FUNCTIONAL BLOCK DIAGRAMS SET ADP1111 A2 VIN GAIN BLOCK/ ERROR AMP 1.25V REFERENCE A1 OSCILLATOR COMPARATOR DRIVER A0 ILIM SW1 GND FB SET SW2 VIN 1.25V REFERENCE R1 A2 GAIN BLOCK/ ERROR AMP ADP1111-5 ADP1111...
Analog Devices
