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LM285BYZ

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Texas Instruments Voltage Reference, TO-92-3. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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LM285BYZ

Texas Instruments · Voltage Reference · TO-92-3

LM285BYZ from Texas Instruments, in a TO-92-3. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 - power_in Anode (negative) terminal of the shunt reference, the ground return, with reverse current of 10µA to 20mA operating and 30mA absolute maximum.
2 + passive Positive (cathode) terminal of the shunt reference that sets VOUT adjustable from 1.24V to 5.30V, with 30mA maximum reverse current.
3 FB input Feedback input that sets the output voltage via an external divider, with feedback current of 13nA typical for the LM285BY.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TO-92-3
Category Power Management (PMIC)
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Reference Voltage (tested limits, BY grade) VREF 1.215 1.24 1.265 V IR = 100μA 4
Reference Voltage Change with Current (tested, BY) 1 mV IMIN < IR < 1mA 4
Reference Voltage Change with Current (tested, BY) 10 mV 1mA < IR < 20mA 4
Reference Voltage Change with Output Voltage (tested, BY) 3 mV IR = 100μA 4
Minimum Operating Current (tested, BY) 9 μA VOUT = VREF 4
Minimum Operating Current (tested, BY) 45 μA VOUT = 5.3V 4
Feedback Current (tested, BY) 20 nA 4
Average Temperature Coefficient (Y suffix) 50 ppm/°c Y Suffix; TMIN to TMAX per note (4) 4
Dynamic Output Impedance 0.3 0.4 Ω IR = 100μA, f = 100Hz, IAC = 0.1 IR, VOUT = VREF 4
Dynamic Output Impedance 0.7 1 Ω IR = 100μA, f = 100Hz, IAC = 0.1 IR, VOUT = 5.3V 4
Reverse Current 30 mA 3
Forward Current 10 mA 3
ESD Susceptibility 2 kV Human body model, 100 pF through 1.5 kΩ 3
Storage Temperature -55 150 °C 3
Soldering Temperature (TO-92 package) 260 °C TO-92 package, 10 sec. 3
Operating Temperature Range (LM285 Series) -40 85 °C LM285 Series 3
Operating Current 10 μA Features: operating current range 1
Operating Current 20 mA Features: operating current range 1
Adjustable Output Voltage Range VOUT 1.24 5.3 V Features: adjustable range 1
Maximum Junction Temperature (LM285, elevated temperature operation) TJ(max) 125 °C Table 1, elevated temperature operation 3
Thermal Resistance Junction to Ambient (TO-92, 0.4in leads) θJA 180 °C/W 0.4in leads 3
Thermal Resistance Junction to Ambient (TO-92, 0.125in leads) θJA 170 °C/W 0.125in leads 3

CAD (KiCad official)

  • Symbol: LM285BYZ
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92-3 (KiCad packages3D, STEP)
  • 3D model files: lm285byz-etched.step / lm285byz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm285byz.step / lm285byz.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (27 pp, sha256 0dc47d98ca08aa27, retrieved 2026-10-21, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF