AIC1117A

AIC1117A 1A Low Dropout Positive Regulator  FEATURES  DESCRIPTION  Dropout Voltage 1.3V at 1A Output Current.  Fast Transient Response.  Line Regulation, typical at 0.015%.  Load Regulation, typical at 0.1%  Current Limiting and Thermal Protection.  Adjustable Output Voltage or Fixed at 1.8V, 2.5V and 3.3V.  Standard 3-Pin Power Packages.  APPLICATIONS  Active SCSI Terminators.  Post Regulators for Switching Supplies.  Battery Chargers.  PC Add-On Card.  TYPICAL APPLICATION CIRCUIT The AIC1117A is a low dropout, three terminals regulator designed to provide output current up to 1A. The device is available in an adjustable version and fixed output voltage of 1.8V, 2.5V and 3.3V. Dropout voltage of maximum of 1.5V is guaranteed at 1A output current. The quality of low dropout voltage and fast transient response make this device ideal for low voltage microprocessor applications. The AIC1117A requires output capacitance of a minimum of 10μF for stability. Built-in output current limiting and thermal limiting provide maximal protection to the AIC1117A against fault conditions. VIN 5V C1 + 10F 3 AIC1117A 2 VOUT 3.3V 1 ADJ VREF RF1 125 1% RF2 205 + C2 10F (Note1) 1% VREF=VOUT - VADJ=1.25V (typ.) VOUT=VREF x (1+RF2/RF1)+ IADJ x RF2 IADJ=55A (typ.) (1) C1 needed if device is far away from filter capacitors. (2) C2 required for stability. Adjustable Voltage Regulator VIN 5V C1 + 10F 3 2 AIC1117A-33 1 GND VOUT 3.3V + C2 10F (Note1) Fixed Voltag...