# MD85E33YA2

**Shanghai Mingda Microelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-3L

MD85E33YA2 from Shanghai Mingda Microelectronics, in a SOT-223-3L. 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 | VIN | power_in | Power input pin; operating input voltage range is 2.2V to 40V (absolute maximum 45V). |
| 2 | GND | power_in | Ground pin; the tab (thermal pad) is electrically connected to the GND node and should be connected to the GND plane for improved thermal performance. |
| 3 | VOUT | power_out | Regulated output voltage pin (3.3V for MD85E33YA2), up to 300mA output current, with a recommended output capacitor of 1uF or more. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-223-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | 2.2 |  | 40 | V |  | 6 |
| Input Voltage (absolute maximum) | VIN | -0.3 |  | 45 | V |  | 5 |
| Output Voltage Accuracy (printed ±2%) | VOUT | -2 |  | 2 | % |  | 1 |
| Temperature Stability |  | -50 |  | 50 | ppm/℃ | VIN = VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤125℃ | 6 |
| GND Current (VOUT(S) 3.0 to 5.3V) | IGND | 1 | 1.5 | 2.5 | uA | VEN=VIN, no load, 3.0≤VOUT(S)≤5.3V | 6 |
| Dropout Voltage at 1mA | VDROP |  | 4 | 8 | mV | VEN=VIN, VOUT(S)=3.3V, IOUT=1mA | 6 |
| Dropout Voltage at 300mA | VDROP |  | 1200 | 1800 | mV | VEN=VIN, VOUT(S)=3.3V, IOUT=300mA | 6 |
| Line Regulation |  |  | 0.01 | 0.02 | %/V | VOUT(S)+2V≤VIN≤40V, IOUT=1mA | 6 |
| Load Regulation (VOUT(S)≤5.3V) |  |  | 25 | 50 | mV | VOUT(S)≤5.3V; VIN = VOUT(S)+2V, 1mA≤IOUT≤300mA | 6 |
| Shutdown Current | ISHUT |  | 0.1 | 1 | uA | VIN=40.0V, VEN=0 | 6 |
| Maximum Output Current | IOUTMAX |  | 300 | 350 | mA |  | 6 |
| Current Limit | ILIM |  | 350 | 550 | mA | VIN= VOUT(S)+2V, VOUT = 0.95 ×VOUT(S) | 6 |
| EN 'H' Level Voltage | VENH | 1.5 |  | 40 | V |  | 6 |
| EN 'L' Level Voltage | VENL | 0 |  | 0.6 | V |  | 6 |
| EN 'H' Level Current | IENH | -0.1 |  | 0.1 | uA | VIN=40V, VEN=VIN | 6 |
| EN 'L' Level Current | IENL | -0.1 |  | 0.1 | uA | VIN=40V, VEN=0 | 6 |
| Power Dissipation (SOT223-3) | PD |  |  | 1500 | mW | Ta=25℃ | 5 |
| Thermal Resistance RθJA (SOT223-3) | RθJA |  | 66 |  | ℃/W |  | 5 |
| Operating Ambient Temperature | Topr | -40 |  | 85 | ℃ |  | 5 |
| Storage Temperature | Tstg | -40 |  | 125 | ℃ |  | 5 |
| ESD Protection (HBM) | ESD HBM |  |  | 5000 | V | HBM | 5 |

## CAD (KiCad official)

- Symbol: `MD85E33YA2`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223-3L (KiCad packages3D, STEP)
- 3D model files: `md85e33ya2-etched.step` / `md85e33ya2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md85e33ya2.step` / `md85e33ya2.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590227083785383936) (17 pp, sha256 `38727c99a8471351`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/md85e33ya2-datasheet.pdf)