# ME431LAXG

**MICRONE** · Voltage Reference · SOT-23

ME431LAXG 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 | REF | input | Reference input pin for programming output voltage via external resistors to 2.5-36 V; maximum input current 10 mA. |
| 2 | A | passive | Anode terminal; maximum voltage to cathode is 36 V; continuous current range ±80 mA. |
| 3 | K | passive | Cathode terminal; regulated output voltage from 2.5 V to 36 V (2.5 V ±0.5% internal reference); continuous current range ±80 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MICRONE |
| 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 (0.5% grade, ME431LAXG) | VREF | 2.488 | 2.5 | 2.512 | V | VKA=VREF, IKA=1mA | 5 |
| Dynamic impedance | KA / Z / |  | 0.05 | 0.5 | Ω | VKA=VREF, IKA=1 ~ 80mA, f≤1.0KHz | 5 |
| Minimum cathode working current | IKA (MIN) |  | 20 | 35 | uA | VKA=VREF | 5 |
| Ratio of reference input voltage change to cathode-to-anode voltage change (10V to VREF) | ΔVREF/ΔVKA |  | -0.4 | -2.7 | mV/V | IKA=1mA, ΔVKA=10V~VREF | 5 |
| Ratio of reference input voltage change to cathode-to-anode voltage change (36V to 10V) | ΔVREF/ΔVKA |  | -0.2 | -2 | mV/V | IKA=1mA, ΔVKA=36V~10V | 5 |
| Reference input current | IREF |  | 0.03 | 0.3 | μA | IKA=1mA, R1=10KΩ, R2=∝ | 5 |
| Reference input current deviation over temperature | ΔIREF |  | 0.03 | 0.1 | μA | IKA=1mA, R1=10KΩ, R2=∝, TA=-40 ~150℃ | 5 |
| Off-state cathode current | IKA (OFF) |  | 0.05 | 1 | μA | VKA=36V, VREF=0 | 5 |
| Cathode voltage (recommended) | VKA |  |  | 36 | V |  | 4 |
| Cathode current (recommended) | IKA | 0.035 |  | 80 | mA |  | 4 |
| Operating ambient temperature (recommended) | TA | -40 |  | 85 | ℃ |  | 4 |
| Cathode voltage (absolute maximum) | VKA |  |  | 36 | V |  | 4 |
| Cathode current, continuous (absolute maximum) | IKA | -80 |  | 80 | mA | Continuous | 4 |
| Reference input current range (absolute maximum) | IREF |  |  | 10 | mA |  | 4 |
| Operating ambient temperature (absolute maximum) | TA | -40 |  | 85 | ℃ |  | 4 |
| Junction temperature range (absolute maximum) | TJ | -40 |  | 150 | ℃ |  | 4 |
| Storage temperature range (absolute maximum) | TSTG | -55 |  | 150 | ℃ |  | 4 |
| Package thermal resistance, junction to ambient | θJA |  |  | 328 | ℃/W | SOT23 package | 4 |
| Package power dissipation | PD |  |  | 0.38 | W | SOT23 package | 4 |

## CAD (KiCad official)

- Symbol: `ME431LAXG`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `me431laxg-etched.step` / `me431laxg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `me431laxg.step` / `me431laxg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MICRONE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588904703052275713) (12 pp, sha256 `457fc184932523b0`, retrieved 2026-09-21, tier: lcsc)
- **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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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](docs/me431laxg-datasheet.pdf)