Part # LM1085 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM1085 3A Low Dropout Positive Regulators

Part Details:

LM1085 June 2005 3A LM1085 Low 3A Low Dropout Positive RegulatorsGeneral Description Features Dropout The LM1085 is a series of low dropout positive voltage n Available in 3.3V, 5.0V, 12V and Adjustable Versions regulators with a maximum dropout of 1.5V at 3A of load n Current Limiting and Thermal Protection current. It has the same pin-out as National Semiconductor s n Output Current 3A industry standard LM317. n Line Regulation 0.015% (typical) The LM1085 is available in an adjustable version, which can n Load Regulation 0.1% (typical) set the output voltage with only two external resistors. It is Positive also available in three fixed voltages: 3.3V, 5.0V and 12.0V. Applications The fixed versions integrate the adjust resistors. n High Efficiency Linear Regulators The LM1085 circuit includes a zener trimmed bandgap ref- n Battery Charger erence, current limiting and thermal shutdown. n Post Regulation for Switching Supplies The LM1085 series is available in TO-220 and TO-263 pack- n Constant Current Regulator Regulators ages. Refer to the LM1084 for the 5A version, and theLM1086 for the 1.5A version. n Microprocessor Supply Connection Diagrams TO-220 Application Circuit 10094702 Top View TO-263 10094752 1.2V to 15V Adjustable Regulator 10094704 Top View Basic Functional Diagram,Adjustable Version 10094765 © 2005 National Semiconductor Corporation DS100947 Ordering Information LM1085 Package

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LM1085.pdf Datasheet