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| 3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed) FEATURES Low Dropout Voltage 500mV at 3A Output Current Fast Transient Response 0.015% Line Regulation 0.1% Load Regulation Internal Thermal and Current Limiting Adjustable or Fixed Output Voltage(1.5, 2.5, 2.85, 3.0, 3.3, 5.0V) Surface Mount Package SOT-223 & TO-263 (D2 Package) 100% Thermal Limit Burn-in TO-263 PKG TO-220 PKG LM1085 APPLICATIONS Battery Charger Adjustable Power Supplies Constant Current Regulators Portable Instrumentation High Efficiency Linear Power Supplies High Efficiency "Green" Computer Systems SMPS Post-Regulator Power PC Supplies Powering VGA & Sound Card 1. Adj/Gnd 2. Output 3. Input ORDERING INFORMATION Device & Marking LM1085T-X.X LM1085R-X.X Package TO-220 TO263 (D2) DESCRIPTION (XX=Vout=1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V Adjustable= AD) The LM1085 is a low dropout three terminal regulator with 3A output current capability. The output voltage is adjustable with the use of a resistor divider. Dropout is guaranteed at a maximum of 500 mV at maximum output current. 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 2 VIN 5V + C1 10 3 LM1085 1 ADJ VREF RF1 124 1% VOUT 3.33V VREF=VOUT-VADJ=1.25V(Typ.) VOUT=VREFx(1+RF2/RF1)+IADJxRF2 IADJ=55(Typ.) C2 10 (1) C1 Needed if device is far away from filter capacitors. (2) C2 Required for stability RF2 205 1% Adjustable Voltage Regulator Mar. 2006 - Rev 06 84 HTC 3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed) ABSOULTE MAXIMUM RATINS CHARACTERISTIC Supply Voltage Operating Junction Temperature Range Storage Temperature Range Thermal Resistance Junction to Case TO-263 Thermal Resistance Junction to Ambient TO-263 Lead Temperature (Soldering) 10 sec. Maximum Output Current SYMBOL Vin Topr Tstg Tjc Tja Tsol Imax OUT =100, LM1085 VALUE 7 0~125 -65~150 3 60 300 3 UNIT V C/W C/W A ELECTRICAL CHARACTERISTICS I PARAMETER 1.5V Version Output Voltage 2.5V Version Output Voltage 2.85V Version Output Voltage 3.0V Version Output Voltage 3.3V Version Output Voltage 5.0V Version Output Voltage All Voltage Options Reference Voltage (V REF) Min. Load Current(Note 3) Line Regulation (V REF(VIN)) Load Regulation (V REF(VOUT)) Dropout Voltage Current Limit IOUT(MAX) Long Term Stability Thermal Regulation (VOUT(Pwr)) Output Noise, RMS Thermal Resistance TA=25, unless otherwise specified MIN TYP MAX UNIT TEST CONDITIONS 0 1.5 1.515 V 0 2.5 2.525 V 0 2.85 2.878 V 0 3 3.03 V 0 3.3 3.333 V 0IOUT3A, 5.5VVIN<10V 4.95 5 5.05 V VIN7V,PPMAX V 1.5V(VIN- OUT)5.75V, 10IOUT3A 1.5V(VIN- OUT)5.75V V 2.75VVIN7V, IOUT=10, TJ=25 10IOUT3A,(VIN-VOUT)=3V,TJ=25 VREF=1% , Iout=3A Vin-Vout=3V 1.4V(VIN-VOUT) Adjustable Only TA=125, 1000Hrs TA=25, 30 pulse 10Hz to 10Khz TA=25 Junction to Tab Junction to Ambient 1.238 1.225 1.25 1.25 5 0.005 0.05 1.1 1.263 1.27 10 0.2 0.3 1.2 V mA % % V A 3.2 4.0 0.3 0.01 1 0.02 % %/W %/Vo 0.003 3 60 /W Mar. 2006 - Rev 06 85 HTC |
Price & Availability of LM1085R-XX
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