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 124Ω 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 205Ω 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 (ΔV REF(VIN)) Load Regulation (ΔV REF(VOUT)) Dropout Voltage Current Limit IOUT(MAX) Long Term Stability Thermal Regulation (ΔVOUT(Pwr)) Output Noise, RMS Thermal Resistance
TA=25℃, unless otherwise specified
MIN TYP MAX UNIT
TEST CONDITIONS
0
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