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LM1085-ADJ (LM1085) – 3A Adjustable Low Dropout (LDO) Positive Voltage Regulator

166.00 Excluding tax

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The LM1085 is a regulator with a maximum dropout of 1.5 V at 3 A of load current. It has the same pin-out as TI’s industry standard LM317.

Two resistors are required to set the output voltage of the adjustable output voltage version of the LM1085. Fixed output voltage versions integrate the adjust resistors. The LM1085 circuit includes a zener trimmed bandgap reference, current limiting and thermal shutdown.


  • Available in 3.3-V, 5.0-V, 12-V and Adjustable Versions
  • Current Limiting and Thermal Protection
  • Output Current 3 A
  • Line Regulation 0.015% (typical)
  • Load Regulation 0.1% (typical)


Parameter Specification
Part number LM1085
Output options Adjustable Output, Fixed Output
Iout (Max) (A) 3
Vin (Max) (V) 29
Vin (Min) (V) 2.6
Vout (Max) (V) 27.5
Vout (Min) (V) 1.25
Fixed output options (V) 3.3, 5, 12
Package Group DDPAK/TO-263 | 3, TO-220 | 3
Regulated outputs (#) 1
Operating temperature range ( C ) -40 to 125
Thermal resistance θJA (°C/W) 23
Noise (uVrms) 38
Rating See Data Sheet
PSRR @ 100 KHz (dB) 30
Accuracy (%) 4
Dropout voltage (Vdo) (Typ) (mV) 1300
Iq (Typ) (mA) 5
Package size: mm2:W x L (PKG) 3DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 3)
3TO-220: 47 mm2: 4.58 x 10.16 (TO-220 | 3)

LM1085-ADJ Datasheet

* product image for illustration purposes only. actual product may vary.


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