器件名称: ADP1173AR-33
功能描述: Micropower DC-DC Converter
文件大小: 478.41KB 共16页
简 介:a
FEATURES Operates From 2.0 V to 30 V Input Voltages Only 110 A Supply Current (Typical) Step-Up or Step-Down Mode Operation Very Few External Components Required Low Battery Detector On-Chip User-Adjustable Current Limit Internal 1 A Power Switch Fixed or Adjustable Output Voltage Versions 8-Pin DIP or SO-8 Package APPLICATIONS Notebook and Palmtop Computers Cellular Telephones Flash Memory Vpp Generators 3 V to 5 V, 5 V to 12 V Converters 9 V to 5 V, 12 V to 5 V Converters Portable Instruments LCD Bias Generators
VIN
Micropower DC-DC Converter ADP1173
FUNCTIONAL BLOCK DIAGRAMS
SET
ADP1173
A2 VIN GAIN BLOCK/ ERROR AMP 1.245V REFERENCE AO ILIM SW1 A1 OSCILLATOR DRIVER SW2
COMPARATOR GND FB
SET
ADP1173-3.3 ADP1173-5 ADP1173-12
A2 GAIN BLOCK/ ERROR AMP 1.245V REFERENCE AO ILIM SW1 A1 OSCILLATOR DRIVER ADP1173-3.3: R1 = 456k ADP1173-5: R1 = 250k ADP1173-12: R1 = 87.4k SENSE SW2
GENERAL DESCRIPTION
The ADP1173 is part of a family of step-up/step-down switching regulators that operates from an input supply voltage of as little as 2 V to 12 V in step-up mode and to 30 V in step-down mode. The ADP1173 consumes as little as 110 A in standby mode, making it ideal for applications that need low quiescent current. An auxiliary gain amplifier can serve as a low battery detector, linear regulator (under voltage lockout) or error amplifier. The ADP1173 can deliver 80 mA at 5 V from a 3 V input in step-up configuration or 100 mA at 5 V from a 12 V input in step-down configuration. F……
