LM1085S-3.0中文资料

3A LOW DROPOUT VOLTAGE REGULATOR (Adjustable & Fixed)LM1085

● Powering VGA & Sound Card ORDERING INFORMATION

Device & Marking Package

LM1085S-XX SOT 223

LM1085T-XX 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

HTC

1

3A LOW DROPOUT VOLTAGE REGULATOR(ADJ)

LM1085

ABSOULTE MAXIMUM RATINS

CHARACTERISTIC Supply Voltage

Operating Junction Temperature Range Storage Temperature Range

Thermal Resistance Junction to Case TO-263Thermal Resistance Junction to Ambient TO-263Lead Temperature (Soldering) 10 sec.Maximum Output Current

ELECTRICAL CHARACTERISTICS I

OUT =100?, T A =25℃, unless otherwise specified

Min. Load Current(Note 3) Line Regulation (ΔV REF (V IN )) Load Regulation (ΔV REF (V OUT )) Dropout Voltage Current Limit I OUT (MAX) Thermal Regulation (ΔV OUT (Pwr)) Output Noise, RMS HTC

2

V

UNIT

0

Output Voltage TEST CONDITIONS Output Voltage Output Voltage 5.050

V

5.0V Version 0.2 Reference Voltage (V REF )V

Output Voltage All Voltage Options 0≤I OUT ≤3A, 5.5V≤V IN <10V V IN ≤7V,P≤P MAX

1.5V≤(V IN-V OUT )≤5.75V, 10?≤I OUT ≤3A 4.9551.1

1.5V≤(V IN-V OUT )≤5.75V

2.75V≤V IN ≤7V, I OUT =10?, T J =25℃ 10?≤I OUT ≤3A,(V IN -V OUT )=3V,T J =25℃ ΔV REF =1% , Iout=3A mA %5100.005%/Vo

℃/W

℃%/W %%V 0.31.2

V Imax

3

3.0V Version Output Voltage 0

4.5V

Tja 60Tsol 300Tjc 3Vin 7Topr 0~125 3.3V Version 1.5V Version 0

2.8781.2380.003

1.25 1.2631.225

1.25 1.270.050.01

Long Term Stability T A =25℃, 30? pulse Vin-Vout=3V

1.4V≤(V IN -V OUT ) Adjustable Only Thermal Resistance

Junction to Tab Junction to Ambient

T A =125℃, 1000Hrs 10Hz to 10Khz T A =25℃30.02

60

MIN TYP MAX 1.485 1.5 1.5152.475A

0.313.2 4.0C/W C/W ℃A

SYMBOL Tstg -65~150

UNIT V ℃VALUE