3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed) FEATURES ● ● ● ● ● ● ● ● TO-220 PKG 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 APPLICATIONS ● ● ● ● ● ● ● ● ● LM1085 TO-263 PKG 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 DESCRIPTION Package TO-220 TO263 (D2) (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 3 VIN 5V VOUT 3.33V LM1085 + 1 ADJ VREF C1 10㎌ RF1 124Ω 1% VREF=VOUT-VADJ=1.25V(Typ.) VOUT=VREFx(1+RF2/RF1)+IADJxRF2 IADJ=55㎂(Typ.) C2 10㎌ RF2 205Ω 1% (1) C1 Needed if device is far away from filter capacitors. (2) C2 Required for stability Adjustable Voltage Regulator Mar. 2006 - Rev 06 84 HTC LM1085 3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed) ABSOULTE MAXIMUM RATINS SYMBOL VALUE Vin 7 V Operating Junction Temperature Range Topr 0~125 ℃ Storage Temperature Range Tstg -65~150 ℃ Tjc 3 C/W CHARACTERISTIC Supply Voltage Thermal Resistance Junction to Case TO-263 UNIT Thermal Resistance Junction to Ambient TO-263 Tja 60 C/W Lead Temperature (Soldering) 10 sec. Tsol 300 ℃ Maximum Output Current Imax 3 A ELECTRICAL CHARACTERISTICS I OUT =100㎃, PARAMETER TA=25℃, unless otherwise specified TEST CONDITIONS MIN TYP MAX UNIT 1.485 1.5 1.515 V 0<IOUT<3A, 3.5V<V IN<10V 2.475 2.5 2.525 V 0<IOUT<3A, 4.35V<V IN<10V 2.821 2.85 2.878 V 0<IOUT<3A, 4.5V<V IN<10V 2.97 3 3.03 V 0<IOUT<3A, 4.75V<V IN<10V 3.267 3.3 3.333 V 0≤IOUT≤3A, 5.5V≤VIN<10V 4.95 5 5.05 V 1.5V Version Output Voltage 0<IOUT<3A, 2.75V<V IN<10V 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) VIN≤7V,P≤PMAX 1.238 1.25 1.263 1.5V≤(VIN-VOUT)≤5.75V, 10㎃≤IOUT≤3A 1.225 1.25 1.27 Min. Load Current(Note 3) 1.5V≤(VIN-VOUT)≤5.75V Line Regulation (ΔV REF(VIN)) 2.75V≤VIN≤7V, IOUT=10㎃, TJ=25℃ V 5 10 mA 0.005 0.2 % Load Regulation (ΔV REF(VOUT)) 10㎃≤IOUT≤3A,(VIN-VOUT)=3V,TJ=25℃ 0.05 0.3 % Dropout Voltage ΔVREF=1% , Iout=3A 1.1 1.2 V Current Limit Vin-Vout=3V IOUT(MAX) Long Term Stability Thermal Regulation (ΔVOUT(Pwr)) Output Noise, RMS Thermal Resistance 1.4V≤(VIN-VOUT) Adjustable Only 3.2 4.0 A TA=125℃, 1000Hrs 0.3 1 % TA=25℃, 30㎳ pulse 0.01 0.02 %/W 10Hz to 10Khz TA=25℃ %/Vo 0.003 Junction to Tab 3 Junction to Ambient 60 Mar. 2006 - Rev 06 85 ℃/W HTC