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LM4040CELT-3.0
Public Made by Adomby adom
STMicroelectronics Voltage Reference, SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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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README
markdownLM4040CELT-3.0
STMicroelectronics · Voltage Reference · SOT-23-3L
LM4040CELT-3.0 from STMicroelectronics, in a SOT-23-3L. 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 | K | passive | Cathode of the shunt reference, where the 3.0 V reverse breakdown voltage is set with Ik of 12 µA minimum and 15 mA maximum operating current. |
| 2 | A | passive | Anode of the shunt reference, the common return terminal. |
| 3 | NC | unconnected | No connect pin that must be left unconnected or connected to the anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-3L |
| 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 (Vk = 3.0 V), LM4040C | Vk | 2.985 | 3 | 3.015 | V | Ik = 12 µA, LM4040C | 4 |
| Precision at 25 °C (LM4040C, 0.5%) | -0.5 | 0.5 | % | Tamb = 25 °C | 1 | ||
| Average temperature coefficient | ΔVk/ΔT | 20 | 70 | ppm/°C | 10 µA < Ik < 20 mA | 4 | |
| Reverse breakdown voltage change with operating current range | ΔVk/ΔIk | 0.2 | 1 | mV | Ik min < Ik < 1 mA, -40°C < Tamb < +125°C | 4 | |
| Reverse breakdown voltage change with operating current range | ΔVk/ΔIk | 1.7 | 4 | mV | 1 mA < Ik < 15 mA, -40°C < Tamb < +125°C | 4 | |
| Static impedance | Rka | 0.15 | 0.3 | Ω | ΔIk = 10 µA to 10 mA | 4 | |
| Reverse breakdown current | Ik | 20 | mA | 3 | |||
| Forward current | If | 15 | mA | 3 | |||
| Power dissipation | Pd | 500 | mW | Tamb = 25 °C, Tjmax = 150 °C (footnote 1) | 3 | ||
| Storage temperature | Tstd | -65 | 150 | °C | 3 | ||
| ESD Human Body Model (HBM) | 2 | kV | 3 | ||||
| ESD Machine Model (MM) | 200 | V | 3 | ||||
| ESD Charged device model | 1500 | V | 3 | ||||
| Lead temperature (soldering) | Tlead | 260 | °C | 10 sec. | 3 | ||
| Max. junction temperature | Tj | 150 | °C | 3 | |||
| Minimum operating current | Ikmin | 10 | µA | 3 | |||
| Maximum operating current | Ikmax | 15 | mA | 3 | |||
| Operating free air temperature range | Toper | -40 | 125 | °C | 3 | ||
| Thermal resistance junction ambient | RthJA | 210 | °C/W | SOT23-3L | 3 | ||
| Thermal resistance junction-case | RthJC | 103 | °C/W | SOT23-3L | 3 |
CAD (KiCad official)
- Symbol:
LM4040CELT-3.0 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files:
lm4040celt-3-0-etched.step/lm4040celt-3-0-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4040celt-3-0.step/lm4040celt-3-0.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (23 pp, sha256
f92699ed8c875e79, retrieved 2026-10-11, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).