# ME2108A28PG

**MICRONE** · DC-DC Converters · SOT-89-3

ME2108A28PG from MICRONE, in a SOT-89-3. 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 | Vss | power_in | Ground pin; the datasheet requires Vss to be well grounded because switching current otherwise shifts the IC's internal zero level and can make operation unstable. |
| 2 | Vout | power_out | Output voltage monitor and IC internal power supply pin, with an output voltage range of 2.0V to 7.0V in 0.1V steps. |
| 3 | Lx | output | Switch pin that drives the inductor; Lx pin voltage is rated to 6.5V and Lx pin current to 600mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MICRONE |
| Package | SOT-89-3 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Oscillation Start-up Voltage | Vstart |  | 0.8 | 0.9 | V | IOUT=1mA, VIN: 0→2V | 7 |
| Supply Current 1 | IDD1 |  |  | 50 | µA | No external component, Vout=Vout×0.95 | 7 |
| Supply Current 2 | IDD2 |  |  | 9 | µA | Vout=Vout+0.5V | 7 |
| Lx Switching Current | ILX | 360 |  |  | mA | VLX=0.4V, Vout=Vout×0.95 | 7 |
| Lx Leakage Current | ILXleak |  |  | 0.5 | µA | Vout=VLX=6V | 7 |
| Oscillation Hold Voltage | Vhold |  | 0.45 |  | V | IOUT=1mA, VIN: 2→0V | 7 |
| Oscillation Frequency | Fosc |  | 180 |  | kHz | Vout=set Vout×0.95 | 7 |
| Duty Ratio on(VLX"L")side | Maxdty |  | 84 |  | % |  | 7 |
| Efficiency | EFFI |  | 85 |  | % |  | 7 |
| Vdd Input Voltage | VIN |  |  | 6.5 | V |  | 6 |
| Lx Pin voltage | VLX |  |  | 6.5 | V |  | 6 |
| Lx Pin current | ILX |  |  | 600 | mA |  | 6 |
| EXT Pin current | IEXT | -30 |  | 30 | mA |  | 6 |
| Continuous Total Power Dissipation SOT89-3 | Pd |  |  | 1.25 | W | SOT89-3 package | 6 |
| Thermal resistance (Junction to air) SOT89-3 | θJA |  | 100 |  | ℃/W | SOT89-3 package | 6 |
| Operating Ambient Temperature | TOpr | -25 |  | 85 | ℃ |  | 6 |
| Maximum junction temperature | TJ | -40 |  | 150 | ℃ |  | 6 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 6 |
| Soldering temperature and time | Tsolder |  |  | 260 | ℃ | 10s | 6 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | ppa |  | body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Nanjing Micro | 17 |

## CAD (KiCad official)

- Symbol: `ME2108A28PG`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `me2108a28pg-etched.step` / `me2108a28pg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `me2108a28pg.step` / `me2108a28pg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MICRONE datasheet](docs/me2108a28pg-datasheet.pdf) (17 pp, sha256 `9945b3a703ae45f0`, retrieved 2026-10-28, tier: lcsc)
- **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/me2108a28pg-datasheet.pdf)