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LM4040DEM3X-2.5

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Texas Instruments Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)lm4040dem3x-2.5factory-2.0.0extractor-text

Verified LM4040DEM3X-2.5

by Ray · last 6 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

6 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LM4040DEM3X-2.5 · SOT-23 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 84-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOT-23
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-15_eyt48/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ lm4040dem3x-2-5.kicad_sym✓ lm4040dem3x-2-5.kicad_mod✓ lm4040dem3x-2-5.step
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Contents

README

markdown

LM4040DEM3X-2.5

Texas Instruments · Voltage Reference · SOT-23

LM4040DEM3X-2.5 from Texas Instruments, in a SOT-23. 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 Cathode passive Shunt current input and regulated reverse-breakdown output voltage pin (2.5V version, operating reverse current 60µA to 15mA).
2 Anode passive Anode pin, normally connected to ground.
3 * passive Die-attach contact that must be left floating or connected to pin 2 because of a parasitic Schottky diode between pins 2 and 3.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23
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
Reverse breakdown voltage tolerance -25 25 mV IR = 100μA, TA = TJ = 25°C 16
Reverse breakdown voltage tolerance -63 63 mV IR = 100μA, TA = TJ = TMIN to TMAX 16
Minimum operating current IRMIN 45 65 μA TA = TJ = 25°C 16
Minimum operating current IRMIN 73 μA TA = TJ = TMIN to TMAX 16
Average reverse breakdown voltage temperature coefficient ΔVR/ΔT -20 20 ppm/°C IR = 10mA 16
Average reverse breakdown voltage temperature coefficient ΔVR/ΔT -15 15 ppm/°C IR = 1mA, TA = TJ = 25°C 16
Average reverse breakdown voltage temperature coefficient ΔVR/ΔT -150 150 ppm/°C IR = 1mA, TA = TJ = TMIN to TMAX 16
Reverse breakdown voltage change with operating current ΔVR/ΔIR 0.3 1 mV IRMIN ≤ IR ≤ 1mA, TA = TJ = 25°C 16
Reverse breakdown voltage change with operating current ΔVR/ΔIR 1.2 mV IRMIN ≤ IR ≤ 1mA, TA = TJ = TMIN to TMAX 16
Reverse breakdown voltage change with operating current ΔVR/ΔIR 2.5 8 mV 1mA ≤ IR ≤ 15mA, TA = TJ = 25°C 16
Reverse breakdown voltage change with operating current ΔVR/ΔIR 10 mV 1mA ≤ IR ≤ 15mA, TA = TJ = TMIN to TMAX 16
Reverse dynamic impedance ZR 0.3 1.1 Ω IR = 1mA, f = 120Hz, IAC = 0.1 IR 16
Industrial temperature range TA -40 85 °C 6
Operating temperature range TA -40 125 °C 6
Reverse current IR 60 μA LM4040-N-2.5 6
Reverse current IR 15 mA LM4040-N-2.5 6
Reverse current IR 20 mA 5
Forward current IF 10 mA 5
Power dissipation, SOT-23 (M3) package PD 306 mW TA = 25°C 5
Storage temperature Tstg -65 150 °C 5
Reverse breakdown voltage VR 2.5 V IR = 100μA 16
Wideband noise eN 35 μVrms IR = 100μA, 10Hz ≤ f ≤ 10kHz 16
Reverse breakdown voltage long-term stability ΔVR 120 ppm t = 1000h, T = 25°C ±0.1°C, IR = 100μA 16
Thermal hysteresis VHYST 0.08 % ΔT = -40°C to 125°C 16
Junction-to-ambient thermal resistance, SOT-23 (DBZ) RθJA 291.9 °C/W SOT-23 (DBZ), 3-pin 6

CAD (KiCad official)

  • Symbol: LM4040DEM3X-2.5
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: lm4040dem3x-2-5-etched.step / lm4040dem3x-2-5-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm4040dem3x-2-5.step / lm4040dem3x-2-5.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (84 pp, sha256 fc3ca7d9c21dc51e, retrieved 2026-11-06, tier: manufacturer)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF