# MD85E57PA1

**Shanghai Mingda Microelectronics** · Linear Voltage Regulators (LDO) · SOT-89-3L

MD85E57PA1 from Shanghai Mingda Microelectronics, in a SOT-89-3L. 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 | VOUT | power_out | Regulated output voltage pin; VOUT must not exceed VIN+0.3V, and the absolute maximum output voltage is Vss-0.3 to VIN+0.3V. |
| 2 | GND | power_in | Ground pin, the reference node for the device. |
| 3 | VIN | power_in | Power input pin; the absolute maximum input voltage is -0.3 to 45V and the operating input range is 2.2V to 40V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-89-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage | VOUT(S) | 0.98 |  | 1.02 | ×VOUT(S) | VIN=VOUT(S)+2V, IOUT=1mA | 4 |
| Line Regulation |  |  | 0.01 | 0.02 | %/V | VOUT(S)+2V≤VIN≤40V, IOUT=1mA | 4 |
| Load Regulation | VOUT2 |  | 50 | 80 | mV | VIN=VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)>5.3V | 4 |
| Temperature Stability |  | -50 |  | 50 | ppm/℃ | VIN=VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤125℃ | 4 |
| GND Current (no load) | IGND | 1.5 | 2.3 | 3.5 | uA | VEN=VIN, no load, VOUT(S)>5.3V | 4 |
| Shutdown Current | ISHUT |  | 0.1 | 1 | uA | VIN=40.0V, VEN=0 | 4 |
| Input Voltage | VIN | 2.2 |  | 40 | V |  | 4 |
| EN 'H' Level Voltage | VENH | 1.5 |  | 40 | V |  | 4 |
| EN 'L' Level Voltage | VENL | 0 |  | 0.6 | V |  | 4 |
| EN 'H' Level Current | IENH | -0.1 |  | 0.1 | uA | VIN=40V, VEN=VIN | 4 |
| EN 'L' Level Current | IENL | -0.1 |  | 0.1 | uA | VIN=40V, VEN=0 | 4 |
| Short Circuit Current | ISHORT |  | 65 |  | mA | VIN=VEN=VOUT(S)+2.0V, VOUT=0V | 4 |
| Input Voltage (absolute maximum) | VIN | -0.3 |  | 45 | V | Unless otherwise indicated Ta=25℃ | 3 |
| Power Dissipation, SOT89-3 | PD |  |  | 1000 | mW | SOT89-3 package, Ta=25℃ | 3 |
| Thermal Resistance, junction-to-board, SOT89-3 | RθJB |  | 100 |  | ℃/W | Mounted on JEDEC standard 4-layer (2s2p) PCB test board | 3 |
| Operating Ambient Temperature | Topr | -40 |  | 85 | ℃ |  | 3 |
| Storage Temperature | Tstg | -40 |  | 125 | ℃ |  | 3 |
| ESD Protection, HBM | ESD HBM |  |  | 5000 | V | HBM | 3 |

## CAD (KiCad official)

- Symbol: `MD85E57PA1`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `md85e57pa1-etched.step` / `md85e57pa1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md85e57pa1.step` / `md85e57pa1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](docs/md85e57pa1-datasheet.pdf) (13 pp, sha256 `b57d90f008c009b2`, retrieved 2026-11-05, 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/md85e57pa1-datasheet.pdf)