# LM285M3-2.5

**HGSEMI** · Voltage Reference · SOT-23-3

LM285M3-2.5 from HGSEMI, in a SOT-23-3. 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 | Cathode of the LM285 reference diode (阴极); the datasheet gives no pin-specific limits, only the device absolute ratings of 30 mA reverse current and 10 mA forward current. |
| 2 | ANODE | passive | Anode of the LM285 reference diode (阳极); the datasheet gives no pin-specific limits, only the device absolute ratings of 30 mA reverse current and 10 mA forward current. |
| 3 | NC | unconnected | Internally not connected (内部无连接) on the SOT-23 package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOT-23-3 |
| 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 |  | 2.425 | 2.5 | 2.575 | V | Ta=25℃, 100µA≤IR≤20mA | 4 |
| Minimum operating current |  |  | 100 | 130 | µA |  | 4 |
| Reverse breakdown voltage change with current |  |  | 1.5 | 2.5 | mV | 100µA ≤ IR≤1mA | 4 |
| Reverse breakdown voltage change with current |  |  | 20 | 25 | mV | 1mA≤IR≤20mA | 4 |
| Reverse current |  |  |  | 30 | mA |  | 3 |
| Forward current |  |  |  | 10 | mA |  | 3 |
| Operating temperature range |  | -40 |  | 85 | ℃ |  | 3 |
| Storage temperature |  | -55 |  | 150 | ℃ |  | 3 |
| Soldering temperature |  |  |  | 260 | ℃ | 点焊，10 秒 | 3 |
| Average temperature coefficient |  |  | 80 | 150 | ppm/℃ | IR = 100 µA | 4 |
| Reverse dynamic impedance |  |  | 1 |  | Ω | IR=100µA, f=20Hz | 4 |
| Wideband noise (rms) |  |  | 120 |  | µV | IR=100µA, 10Hz≤f≤10kHz | 4 |
| Long-term stability |  |  | 20 |  | ppm | IR=100µA, T=1000Hr, TA=25°C±0.1°C | 4 |

## CAD (KiCad official)

- Symbol: `LM285M3-2.5`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `lm285m3-2-5-etched.step` / `lm285m3-2-5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm285m3-2-5.step` / `lm285m3-2-5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757815048209076224) (13 pp, sha256 `669d45f8440f41b2`, retrieved 2026-10-17, 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 0.3`, 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](docs/lm285m3-2-5-datasheet.pdf)