# MD7141H

**Shanghai Mingda Microelectronics** · Linear Voltage Regulators (LDO) · SOT-23-3L

MD7141H from Shanghai Mingda Microelectronics, in a SOT-23-3L. 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 | GND | power_in | Ground terminal (接地端). |
| 2 | VDD | power_in | Power input terminal, rated up to 32V absolute maximum input voltage, with 1.0 µF or larger input capacitor recommended. |
| 3 | VOUT | power_out | Regulated 4.1V ±3% output terminal for MD7141H, up to 30mA with 30mA short-circuit limit, requiring a 2.2 µF or larger output capacitor with 0.5-5Ω ESR to GND. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-3L |
| 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 | 3.997 | 4.1 | 4.223 | V | VIN=6.1V, IOUT=10mA | 3 |
| Output current | IOUT | 25 | 30 |  | mA | VIN=6.1V | 3 |
| Dropout voltage | Vdrop |  | 40 | 60 | mV | IOUT=1mA | 3 |
| Line regulation | ΔVOUT/ΔVIN·VOUT |  | 0.05 | 0.2 | %/V | 5.1V≤VIN≤32V, IOUT=1mA | 3 |
| Load regulation | ΔVOUT2 |  | 60 | 100 | mV | VIN=6.1V, 1.0mA≤IOUT≤30mA | 3 |
| Output voltage temperature coefficient | ΔVOUT/ΔTa·VOUT | -100 | 50 | 100 | ppm/℃ | VIN=6.1V, IOUT=10mA, -40℃≤Ta≤85℃ | 3 |
| Quiescent current | ISS |  | 1.2 | 5 | uA | VIN=32V, no load | 3 |
| Input voltage | Vmax |  |  | 32 | V |  | 3 |
| Input voltage (absolute maximum) | VIN |  |  | 32 | V | Ta=25℃ | 2 |
| Power dissipation SOT-23-3 | PD |  |  | 250 | mW | SOT_23-3/5, Ta=25℃ | 2 |
| Operating ambient temperature | Topr | -40 |  | 85 | ℃ |  | 2 |
| Storage temperature | Tstg | -40 |  | 125 | ℃ |  | 2 |
| Output short-circuit current | Ishort |  | 30 |  | mA | Vout=0V | 3 |
| Input capacitor | CIN | 1 |  |  | µF |  | 5 |
| Output capacitor (tantalum) | CL | 2.2 |  |  | µF | tantalum capacitor | 5 |

## CAD (KiCad official)

- Symbol: `MD7141H`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `md7141h-etched.step` / `md7141h-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md7141h.step` / `md7141h.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](docs/md7141h-datasheet.pdf) (13 pp, sha256 `0de18d8f469d00d1`, retrieved 2026-10-23, 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-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/md7141h-datasheet.pdf)