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LM4040B30FTA

Public Unreviewed

by Ray

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

componentpmiclm4040b30fta
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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

markdown

LM4040B30FTA

Diodes Incorporated · Voltage Reference · SOT-23

LM4040B30FTA 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 reference. Sourced through a bias resistor from the supply; regulates to VREF = 3.0V above the anode when reverse current is within 60µA to 15mA.
2 Anode passive Anode (-) of the shunt reference. Reference/return terminal; all voltages in the datasheet are specified relative to this pin.
3 NC unconnected No internal connection. Must be left floating or tied to pin 2 (Anode) per the datasheet note.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • LM4040B30FTA

CAD (KiCad official)

  • Symbol: LM4040B30FTA
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm4040b30fta.step 59 KB You want the bare part, or you mark your own boards.
lm4040b30fta-etched.step 2.0 MB You want the part with LM4040B30FTA already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 511 faces against 69 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

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