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MD7218A50PA1
Public Made by Adomby adom
Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3L. Pinout cross-checked by two models against 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
markdownMD7218A50PA1
Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L
MD7218A50PA1 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 | GND | power_in | Ground reference pin for the regulator (pin 1 of the SOT89-3L top view). |
| 2 | VIN | power_in | Input supply pin, shown as the package tab on the SOT89-3L drawing; absolute maximum VIN is 15 V (-0.3 V to 15 V), and the electrical table lists an input range of 2.2 V to 18 V. |
| 3 | VOUT | power_out | Regulated output from the P-channel pass transistor; VOUT must not exceed VIN + 0.3 V or the device may be damaged by reverse current through the parasitic diodes. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-89-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Output voltage (VOUT(S) factor, lower limit) | VOUT(S) | 0.98 | x VOUT(S) | VIN=VOUT(S)+2V, IOUT=1mA; 5.0V variant | 4 | ||
| Output voltage (VOUT(S) factor, upper limit) | VOUT(S) | 1.02 | x VOUT(S) | VIN=VOUT(S)+2V, IOUT=1mA; 5.0V variant | 4 | ||
| Output voltage accuracy | VOUT(S) | -2 | 2 | % | Printed as ±2% in features | 1 | |
| Temperature stability | ΔVOUT/ΔT | -50 | 50 | ppm/℃ | VIN = VOUT(S)+2V, IOUT=1mA, -40℃≤Ta≤125℃ | 4 | |
| GND current (no load, VOUT(S)≤5.0V) | IGND | 1 | 1.6 | 2 | µA | no load; VOUT(S)≤5.0V | 4 |
| Input voltage | VIN | 2.2 | 18 | V | 4 | ||
| Line regulation | ΔVOUT/ΔVIN | 0.01 | 0.02 | %/V | VOUT(S)+2V≤VIN≤15V, IOUT=1mA | 4 | |
| Load regulation (VOUT(S)≤5.0V) | VOUT2 | 80 | mV | VIN=VOUT(S)+2V, 1mA≤IOUT≤1A; VOUT(S)≤5.0V | 4 | ||
| Dropout voltage at IOUT=1mA | VDROP | 4 | 8 | mV | IOUT=1mA | 4 | |
| Dropout voltage at IOUT=1A | VDROP | 650 | 900 | mV | IOUT=1A | 4 | |
| Maximum output current | IOUTMAX | 1 | A | 4 | |||
| Current limit | ILIM | 1.5 | A | VIN= VOUT(S)+2V, VOUT = 0.95 ×VOUT(S) | 4 | ||
| Power supply rejection ratio at 10Hz | PSRR | 71 | dB | f=10Hz, IOUT=10mA; measured at VOUT(S)=5V, VIN=7V | 4 | ||
| Power supply rejection ratio at 100Hz | PSRR | 70 | dB | f=100Hz, IOUT=10mA; measured at VOUT(S)=5V, VIN=7V | 4 | ||
| Power supply rejection ratio at 1kHz | PSRR | 51 | dB | f=1kHz, IOUT=10mA; measured at VOUT(S)=5V, VIN=7V | 4 | ||
| Short circuit current | ISHORT | 30 | mA | VIN=VOUT(S)+2.0V, VOUT=0V | 4 | ||
| Over temperature protection | OTP | 150 | ℃ | IOUT=1mA | 4 | ||
| GND current at IOUT=100mA | IGND | 420 | µA | IOUT=100mA | 4 | ||
| Input voltage (absolute maximum) | VIN | -0.3 | 15 | V | 3 | ||
| Power dissipation SOT89-3L | PD | 1000 | mW | SOT89-3L | 3 | ||
| Thermal resistance junction-to-board SOT89-3L | 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 | 4000 | V | 3 |
CAD (KiCad official)
- Symbol:
MD7218A50PA1 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
md7218a50pa1-etched.step/md7218a50pa1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md7218a50pa1.step/md7218a50pa1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (15 pp, sha256
a1ab1acfaf9f63a7, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).