LM1084 5A LOW DROPOUT VOLTAGE REGULATOR (Adjustable & Fixed) SOT-223 PKG (FRONT VIEW) FEATURES ● ● ● ● ● ● ● ● Low Dropout Voltage 500mV at 5A 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 1 2 PIN FUNCTION 1. Adj/Gnd 2. Vout 3. Vin 3 TO-263 (D2 PKG, FRONT VIEW) 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 PIN FUNCTION 1. Adj/Gnd 2. Vout 3. Vin 1 2 3 ORDERING INFORMATION Device & Marking LM1084S-XX LM1084T-XX DESCRIPTION Package SOT 223 TO263 (D2) (XX=Vout=1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V Adjustable= AD) The LM1084 is a low dropout three terminal regulator with 5A 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 3 VIN 5V + 2 VOUT 3.33V LM1084 1 ADJ VREF C1 10㎌ VREF=VOUT-VADJ=1.25V(Typ.) VOUT=VREFx(1+RF2/RF1)+IADJxRF2 IADJ=55㎂(Typ.) RF1 124Ω 1% C2 10㎌ RF2 205Ω 1% (1) C1 Needed if device is far away from filter capacitors. (2) C2 Required for stability Adjustable Voltage Regulator HTC 1 5A LOW DROPOUT VOLTAGE REGULATOR(ADJ) LM1084 ABSOULTE MAXIMUM RATINS SYMBOL CHARACTERISTIC VALUE UNIT Vin 7 V Operating Junction Temperature Range Topr 0~125 ℃ Storage Temperature Range Tstg -65~150 ℃ Supply Voltage 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 5 A ELECTRICAL CHARACTERISTICS I OUT =100㎃, PARAMETER T A=25℃, unless otherwise specified TEST CONDITIONS MIN TYP MAX UNIT 1.475 1.5 1.525 V 0<IOUT<5A, 4.0V<V IN<10V 2.46 2.5 2.54 V 0<IOUT<5A, 4.35V<V IN<10V 2.805 2.85 2.895 V 0<IOUT<5A, 4.5V<V IN<10V 2.95 3 3.05 V 0<IOUT<5A, 4.8V<V IN<10V 3.247 3.3 3.353 V 0≤IOUT≤5A, 6.5V≤VIN<12V 4.92 5 5.08 V 1.5V Version Output Voltage 0<IOUT<5A, 3.3V<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 1.5V≤(VIN-VOUT)≤5.75V, 10㎃≤IOUT≤5A 1.23 1.25 1.27 1.235 1.25 1.265 V Min. Load Current(Note 3) 1.5V≤(VIN-VOUT)≤5.75V 5 10 mA Line Regulation (ΔV REF(VIN)) 2.75V≤VIN≤7V, IOUT=10㎃, TJ=25℃ 0.04 0.2 % Load Regulation (ΔV REF(VOUT)) 10㎃≤IOUT≤5A,(VIN-VOUT)=3V,TJ=25℃ 0.08 0.4 % Dropout Voltage ΔVREF=1% , Iout=5A 0.45 0.5 V Current Limit Vin-Vout=3V IOUT(MAX) Long Term Stability Thermal Regulation (ΔVOUT(Pwr)) Output Noise, RMS Thermal Resistance 5.5 1.4V≤(VIN-VOUT) Adjustable Only 6.8 TA=125℃, 1000Hrs 0.3 TA=25℃, 30㎳ pulse 0.003 10Hz to 10Khz TA=25℃ A 1 % %/W %/Vo 0.003 Junction to Tab 3 Junction to Ambient 60 ℃/W HTC 2