component
ME431NAXG
Public Made by Adomby adom
MICRONE Voltage Reference, SOT-23. Pinout extracted from 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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Contents
README
markdownME431NAXG
MICRONE · Voltage Reference · SOT-23
ME431NAXG from MICRONE, 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 | A | passive | Anode terminal of the shunt regulator (system ground / low side of the internal shunt element). Sinks the regulated cathode current back to the return rail. |
| 2 | K | passive | Cathode terminal of the shunt regulator (high side). Sinks 1 mA to 100 mA when the reference conducts; withstands up to 36 V (abs-max 40 V) with respect to the anode. |
| 3 | REF | input | Reference / control input to the internal error amplifier's non-inverting input. Regulates the cathode-anode voltage such that V(REF) = VREF (typ. 2.500 V, ±0.4% for the 'A' grade). Reference input current 0.7 µA typ (3 µA max); abs-max IREF = 10 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MICRONE |
| Package | SOT-23 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
Same part, different packaging or reel option.
ME431NAXGME431NAXGNBXGME431NAXGBXGME431NAXGATGME431NAXGBTGME431NAXGATBGME431NAXGBTBG
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Cathode voltage | VKA | 40 | V | 4 | |||
| Cathode current range (continuous) | IKA | -100 | 130 | mA | 4 | ||
| Reference input current range | IREF | 10 | mA | 4 | |||
| Power dissipation (SOT23 package) | PD | 300 | mW | SOT23 package | 4 | ||
| Junction temperature | TJ | 160 | ℃ | 4 | |||
| Storage temperature range | TSTG | -65 | 150 | ℃ | 4 | ||
| Package thermal impedance (SOT23 package) | θJA | 350 | ℃/W | SOT23 package | 4 | ||
| Cathode voltage | VKA | 36 | V | Minimum printed as VREF | 4 | ||
| Cathode current | IKA | 1 | 100 | mA | 4 | ||
| Operating ambient temperature range | -40 | 125 | ℃ | 4 | |||
| Reference voltage (0.4% grade) | VREF | 2.49 | 2.5 | 2.51 | V | VKA=VREF, IKA=10mA | 5 |
| Deviation of reference voltage over temperature (0 to 70℃) | ΔVREF | 7 | 10 | mV | VKA=VREF, IKA=10mA, 0 to 70℃ | 5 | |
| Deviation of reference voltage over temperature (-40 to 150℃) | ΔVREF | 25 | 30 | mV | VKA=VREF, IKA=10mA, -40 to 150℃ | 5 | |
| Dynamic impedance | KA / Z / | 0.15 | 0.5 | Ω | VKA=VREF, IKA=1 to 100mA, f≤1.0KHz | 5 | |
| Minimum cathode current for regulation | IKA (MIN) | 0.4 | 1 | mA | VKA=VREF | 5 | |
| Ratio of change in reference voltage to change in cathode voltage (ΔVKA = 10V to VREF) | ΔVREF/ΔVKA | -0.8 | -2.5 | mV/V | IKA=10mA, ΔVKA=10V to VREF | 5 | |
| Ratio of change in reference voltage to change in cathode voltage (ΔVKA = 36V to 10V) | ΔVREF/ΔVKA | -0.6 | -1.5 | mV/V | IKA=10mA, ΔVKA=36V to 10V | 5 | |
| Reference current | IREF | 0.7 | 3 | μA | IKA=10mA, R1=10KΩ, R2=∝ | 5 | |
| Deviation of reference current over full temperature range | ΔIREF | 0.1 | 1.2 | μA | IKA=10mA, R1=10KΩ, R2=∝, TA=40 to 150℃ | 5 | |
| Off-state cathode current | IKA (OFF) | 0.03 | 0.3 | μA | VKA=36V, VREF=0 | 5 | |
| Reference voltage tolerance (ME431NAXG, suffix A) | -0.4 | 0.4 | % | VREF=2.5V±0.4% | 2 | ||
| Equivalent full-range temperature coefficient | 20 | ppm/℃ | Equivalent full-range, typical (features list) | 1 |
CAD (KiCad official)
- Symbol:
ME431NAXG - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
me431naxg-etched.step/me431naxg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);me431naxg.step/me431naxg.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
me431naxg.step |
59 KB | You want the bare part, or you mark your own boards. |
me431naxg-etched.step |
1.3 MB | You want the part with ME431NAXG already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 342 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: MICRONE datasheet (12 pp, sha256
60082e69a25c0be4, 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).