LM1085R-3.3

3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed) LM1085 FEATURES TO-263 PKG ● Output Current of 3A ● Fast Transient Response ● 0.04% Line Regulation ● 0.2% Load Regulation ● Internal Thermal and Current Limiting ● Adjustable or Fixed Output Voltage(1.5V, 1.8V, 2.5V, 3.3V, 5.0V) ● Surface Mount Package TO-263 3LD & TO-252 3L ● 100% Thermal Limit Burn-in ● Low Dropout Voltage 1.5V at 3A Output Current ● Moisture Sensitivity Level 3 TO-252 PKG APPLICATIONS 1. ADJ / GND ● High Efficiency Linear Regulators / Power Supply ● High Efficiency "Green" Computer Systems ● Constant Current Regulators ● Portable Instrumentation ● SMPS Post-Regulator ● Adjustable Power Supplies ● Powering VGA & Sound Card * Heatsink surface connected to Pin 2. 2. OUTPUT 3. INPUT ORDERING INFORMATION Device Package LM1085R-X.X TO-263 3LD LM1085RS-X.X TO-252 3LD (X.X=VOUT=1.5V, 1.8V, 2.5V, 3.3V, 5.0V, ADJ) DESCRIPTION The LM1085 series of positive adjustable and fixed regulators are designed to provide 3A with high efficient. All internal circuitry is designed to operate down to 1.5V input to output differential. On-chip trimming adjusts the reference voltage to 1%. It's low dropout voltage and fast transient response make it ideal for low voltage microprocessor applications. Internal current and thermal limiting provides protection against any overload condition that would create excessive junction temperature. TEST & TYPICAL APPLICATION CIRCUIT LM1085-3.3V LM1085-ADJ Note VREF=VOUT-VADJ=1.25V(Typ.) IADJ=55㎂(Typ.) VOUT = VREF x (1+RF2/RF1) + IADJ x RF2 (1) C1 needed if device is far away from filter capacitors. (2) C2 minimum value required for stability Nov. 2010-Rev. 1.4 -1- HTC 3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed) LM1085 BLOCK DIAGRAM ABSOULTE MAXIMUM RATINGS CHARACTERISTIC SYMBOL VALUE UNIT Supply Voltage VIN 12 V Operating Temperature Range TA -10 ~ 70 ℃ Junction Temperarture TJ 0 ~ 125 ℃ Storage Temperature Range Tstg -65 ~ 150 ℃ Thermal Resistance Junction to Case TO-263 Tjc 3 C/W Thermal Resistance Junction to Ambient TO-263 Tja 60 C/W Lead Temperature (Soldering) 10 sec. Tsol 300 ℃ Maximum Output Current Imax 3 A -2- HTC 3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed) LM1085 ELECTRICAL CHARACTERISTICS IOUT=100mA, TA=25°C, unless otherwise specified PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 0