component
SGM431VBXN3LG
Public Made by Adomby adom
SGMICRO Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
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|---|---|
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| page.json | 17d ago |
| README.md | 17d ago |
| sgm431vbxn3lg-etched.glb | 17d ago |
| sgm431vbxn3lg-etched.step | 17d ago |
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| sgm431vbxn3lg.step | 17d ago |
SGM431VBXN3LG
SGMICRO · Voltage Reference · SOT-23
SGM431VBXN3LG from SGMICRO, 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 | REF | input | Threshold input relative to the common anode; the internal reference is approximately 1.24V, and the cathode voltage is set by the external divider tied to this pin. |
| 2 | CATHODE | bidirectional | Shunt current/voltage input; the cathode voltage must stay between VREF and 18V and the cathode current between 0.1mA and 70mA. |
| 3 | ANODE | passive | Common pin, normally connected to ground; all voltage ratings are referenced to the anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SGMICRO |
| 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 |
|---|---|---|---|---|---|---|---|
| Reference Voltage (TJ = +25℃) | VREF | 1.234 | 1.24 | 1.246 | V | VKA = VREF, IKA = 10mA, TJ = +25℃ | 4 |
| Reference Voltage (TJ = -40℃ to +125℃) | VREF | 1.225 | 1.255 | V | VKA = VREF, IKA = 10mA, TJ = -40℃ to +125℃ | 4 | |
| Deviation of Reference Input Voltage over Full Temperature Range | VI(DEV) | 2 | 10 | mV | VKA = VREF, IKA = 10mA | 4 | |
| Ratio of Change in Reference Voltage to the Change in Cathode Voltage | ΔVREF/ΔVKA | -0.1 | -0.2 | mV/V | IKA = 10mA, VKA = VREF to 18V | 4 | |
| Reference Input Current | IREF | 0.06 | 0.15 | µA | IKA = 10mA, R1 = 10kΩ, R2 = open, see Figure 9 | 4 | |
| Deviation of Reference Input Current over Full Temperature Range | II(DEV) | 0.15 | 0.5 | µA | IKA = 10mA, R1 = 10kΩ, R2 = open, see Figure 9 | 4 | |
| Minimum Cathode Current for Regulation | IMIN | 65 | 80 | µA | VKA = VREF | 4 | |
| Off-State Cathode Current | IK(OFF) | 0.01 | 0.1 | µA | VKA = 18V, VREF = 0V | 4 | |
| Dynamic Impedance | /ZKA/ | 0.1 | 0.3 | Ω | VKA = VREF, f ≤ 1kHz, IKA = 0.1mA to 70mA | 4 | |
| Cathode Voltage (recommended) | VKA | 18 | V | 2 | |||
| Operating Junction Temperature Range (recommended) | TJ | -40 | 125 | ℃ | 2 | ||
| Junction Temperature (absolute maximum) | TJ | 150 | ℃ | 2 | |||
| Storage Temperature Range | TSTG | -65 | 150 | ℃ | 2 | ||
| Lead Temperature (Soldering) | 260 | ℃ | Soldering, 10s | 2 | |||
| Package Thermal Resistance, SOT-23 (junction to ambient) | θJA | 290 | ℃/W | SOT-23 | 2 |
CAD (KiCad official)
- Symbol:
SGM431VBXN3LG - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
sgm431vbxn3lg-etched.step/sgm431vbxn3lg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sgm431vbxn3lg.step/sgm431vbxn3lg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: SGMICRO datasheet (16 pp, sha256
5277ea25e407e75a, retrieved 2026-10-17, 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).