component
MD5140
Public Made by Adomby adom
Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMD5140
Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L
MD5140 from Shanghai Mingda Microelectronics, in a SOT-23-5L. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Unregulated input supply. Operating range 1.4 V to 7.0 V, absolute max 8.0 V. Bypass with a 1.0 µF (or larger) low-ESR ceramic capacitor placed as close as possible to the pin. |
| 2 | GND | power_in | Device ground / reference return. Typical GND (quiescent) current is 0.5 µA at no load. |
| 3 | CE | input | Chip enable, active-high (ON/OFF logic = enable high). V_CEH ≥ 1.0 V enables the regulator; V_CEL ≤ 0.38 V disables it and engages the C_OUT auto-discharge path (~450 Ω typ). Max input 6.0 V; leakage ±0.1 µA. Do not leave floating. |
| 4 | NC | unconnected | No internal connection. May be left floating or tied to GND for mechanical/thermal support. |
| 5 | VOUT | power_out | Regulated 4.0 V output, ±2 % accuracy, up to 300 mA (current limit 470 mA typ, foldback short-circuit ~65 mA). Requires an output capacitor of 0.1 µF or greater (low-ESR ceramic compatible). VOUT must never exceed VIN + 0.3 V (reverse-parasitic diode risk). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-5L |
| Category | PMIC |
| Pins | 5 |
CAD (KiCad official)
- Symbol:
MD5140 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
md5140-etched.step/md5140-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md5140.step/md5140.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (14 pp, sha256
b9016866a24d108a, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).