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MD7218A40PA1
Public Made by Adomby adom
Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MD7218A40PA1
Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3L
MD7218A40PA1 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 pin of the regulator. |
| 2 | VIN | power_in | Input supply pin (also the center tab), with absolute maximum rating of -0.3 to 15V and recommended operating input of 2.2V to 18V per the electrical table. |
| 3 | VOUT | power_out | Regulated 4.0V output (MD7218A40) delivering up to 1A, with output potential not allowed to exceed VIN+0.3V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-89-3L |
| 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 (4.0V variant, relative to VOUT(S)) | VOUT(S) | 0.98 | 1.02 | ×VOUT(S) | VIN=VOUT(S)+2V, IOUT=1mA | 4 | |
| Dropout Voltage | VDROP | 4 | 8 | mV | IOUT=1mA | 4 | |
| Dropout Voltage | VDROP | 650 | 900 | mV | IOUT=1A | 4 | |
| Line Regulation | 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 | 4 | ||
| Temperature Stability | -50 | 50 | ppm/℃ | VIN=VOUT(S)+2V, IOUT=1mA, -40℃≤Ta≤125℃ | 4 | ||
| GND Current (VOUT(S)≤5.0V) | IGND | 1 | 1.6 | 2 | µA | no load | 4 |
| Input Voltage | VIN | 2.2 | 18 | V | 4 | ||
| Input Voltage (absolute maximum) | VIN | -0.3 | 15 | V | 3 | ||
| Power Dissipation | PD | 1000 | mW | SOT89-3L package | 3 | ||
| Thermal Resistance Junction-to-Board | RθJB | 100 | ℃/W | SOT89-3L, mounted on JEDEC standard 4-layer (2s2p) PCB | 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:
MD7218A40PA1 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
md7218a40pa1-etched.step/md7218a40pa1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md7218a40pa1.step/md7218a40pa1.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 2026-10-29, 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).
# MD7218A40PA1
**Shanghai Mingda Microelectronics** · Linear Voltage Regulators (LDO) · SOT-89-3L
MD7218A40PA1 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 pin of the regulator. |
| 2 | VIN | power_in | Input supply pin (also the center tab), with absolute maximum rating of -0.3 to 15V and recommended operating input of 2.2V to 18V per the electrical table. |
| 3 | VOUT | power_out | Regulated 4.0V output (MD7218A40) delivering up to 1A, with output potential not allowed to exceed VIN+0.3V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-89-3L |
| 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 (4.0V variant, relative to VOUT(S)) | VOUT(S) | 0.98 | | 1.02 | ×VOUT(S) | VIN=VOUT(S)+2V, IOUT=1mA | 4 |
| Dropout Voltage | VDROP | | 4 | 8 | mV | IOUT=1mA | 4 |
| Dropout Voltage | VDROP | | 650 | 900 | mV | IOUT=1A | 4 |
| Line Regulation | | | 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 | 4 |
| Temperature Stability | | -50 | | 50 | ppm/℃ | VIN=VOUT(S)+2V, IOUT=1mA, -40℃≤Ta≤125℃ | 4 |
| GND Current (VOUT(S)≤5.0V) | IGND | 1 | 1.6 | 2 | µA | no load | 4 |
| Input Voltage | VIN | 2.2 | | 18 | V | | 4 |
| Input Voltage (absolute maximum) | VIN | -0.3 | | 15 | V | | 3 |
| Power Dissipation | PD | | | 1000 | mW | SOT89-3L package | 3 |
| Thermal Resistance Junction-to-Board | RθJB | | 100 | | ℃/W | SOT89-3L, mounted on JEDEC standard 4-layer (2s2p) PCB | 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: `MD7218A40PA1`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `md7218a40pa1-etched.step` / `md7218a40pa1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md7218a40pa1.step` / `md7218a40pa1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](docs/md7218a40pa1-datasheet.pdf) (15 pp, sha256 `a1ab1acfaf9f63a7`, retrieved 2026-10-29, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/md7218a40pa1-datasheet.pdf)