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LM4040B25FTA

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by Ray

Diodes Incorporated Voltage Reference, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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LM4040B25FTA

Diodes Incorporated · Voltage Reference · SOT-23

LM4040B25FTA from Diodes Incorporated, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Cathode passive Cathode of the shunt voltage reference. Bias through a series resistor from the positive supply; reverse current must be between 60µA and 15mA to maintain regulation at VREF = 2.5V above the Anode.
2 Anode passive Anode of the shunt voltage reference. Typically tied to circuit ground (return). All datasheet voltages are referenced to this pin unless otherwise stated.
3 NC unconnected No internal connection. Must be left floating or tied to pin 2 (Anode).

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • LM4040B25FTA

CAD (KiCad official)

  • Symbol: LM4040B25FTA
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (16 pp, sha256 273ea3e61e9ec2d9, retrieved 2026-08-17, tier: manufacturer)
  • 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