# MD7601A50

**Shanghai Mingda Microelectronics** · Linear Voltage Regulators (LDO) · TO-252

MD7601A50 from Shanghai Mingda Microelectronics, in a TO-252. 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 | Input supply pin, operating range 2.2V to 40V (absolute maximum 45V), with a 2.2uF or larger input capacitor placed close to the IC. |
| 2 | GND | power_in | Ground pin of the regulator, with about 10-30uA ground current at no load. |
| 3 | VOUT | power_out | Regulated 5.0V output (±2%) delivering up to 1A (1.8A current limit with foldback), with a 2.2uF or larger output capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | TO-252 |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| Dropout Voltage | VDROP |  | 4 | 8 | mV | IOUT=1mA | 3 |
| Dropout Voltage | VDROP |  | 1000 | 1500 | mV | IOUT=1A | 3 |
| Line Regulation |  |  | 0.01 | 0.02 | %/V | VOUT(S)+2V≤VIN≤40V, IOUT=1mA | 3 |
| Load Regulation | ΔVOUT2 |  | 20 | 80 | mV | VIN=VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)≤10V | 3 |
| Temperature Stability |  | -50 |  | 50 | ppm/°C | VIN=VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤85℃ | 3 |
| GND Current | IGND |  | 10 | 30 | uA | no load, VOUT(S)≤10V | 3 |
| GND Current | IGND |  | 460 |  | uA | IOUT=100mA | 3 |
| Input Voltage | VIN | 2.2 |  | 40 | V |  | 3 |
| Maximum Output Current | IOUTMAX | 1 |  |  | A |  | 3 |
| Current Limit | ILIM |  | 1.8 |  | A | VIN=VOUT(S)+2V, VOUT=0.95×VOUT(S) | 3 |
| Short Circuit Current | ISHORT |  | 50 |  | mA | VIN=VOUT(S)+2V, VOUT=0V, VOUT(S)≤10V | 3 |
| Over Temperature Protection | OTP |  | 180 |  | ℃ | IOUT=1mA | 3 |
| Input Voltage | VIN | -0.3 |  | 45 | V | Ta=25℃ | 2 |
| Power Dissipation | PD |  |  | 1800 | mW | TO 252 | 2 |
| Operating Ambient Temperature | Topr | -40 |  | 85 | ℃ |  | 2 |
| Storage Temperature | Tstg | -40 |  | 125 | ℃ |  | 2 |
| ESD Protection HBM | ESD |  |  | 2000 | V | HBM | 2 |
| PSRR | PSRR |  | 84 |  | dB | f=10Hz, VOUT(S)=3.6V | 3 |
| PSRR | PSRR |  | 80 |  | dB | f=100Hz, VOUT(S)=3.6V | 3 |
| PSRR | PSRR |  | 58 |  | dB | f=1kHz, VOUT(S)=3.6V | 3 |

## CAD (KiCad official)

- Symbol: `MD7601A50`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `md7601a50-etched.step` / `md7601a50-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md7601a50.step` / `md7601a50.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](docs/md7601a50-datasheet.pdf) (12 pp, sha256 `9797424939fb0df2`, retrieved 2026-10-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/md7601a50-datasheet.pdf)