器件名称: ADP1111AR-12
功能描述: Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
文件大小: 406.88KB 共16页
简 介:a
Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V ADP1111
FUNCTIONAL BLOCK DIAGRAMS
SET
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
ADP1111
A2 VIN GAIN BLOCK/ ERROR AMP A0 ILIM SW1 1.25V REFERENCE
A1
OSCILLATOR DRIVER
COMPARATOR
GND
FB SET
SW2
ADP1111-5 ADP1111-12
A2 VIN GAIN BLOCK/ ERROR AMP A0 ILIM SW1 1.25V REFERENCE
A1
OSCILLATOR DRIVER SW2
R1
COMPARATOR R2 220k
GENERAL DESCRIPTION
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 d……
