component
MD85A36PA1
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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.
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MD85A36PA1
Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L
MD85A36PA1 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; the datasheet specifies it as the ground reference for the regulator. |
| 2 | VIN | power_in | Power input pin; the input voltage range is 2.2V to 40V, with an absolute maximum of 45V (-0.3V to 45V). |
| 3 | VOUT | power_out | Regulated output voltage pin; VOUT must not exceed VIN+0.3V, otherwise reverse current through the parasitic diodes can destroy the IC. |
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 accuracy (printed tolerance) | VOUT | -2 | 2 | % | 1 | ||
| Temperature stability | ΔVOUT/(VOUT·ΔT) | -50 | 50 | ppm/℃ | VIN = VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤125℃ | 4 | |
| Dropout voltage (IOUT=1mA) | VDROP | 4 | 8 | mV | VEN=VIN, VOUT(S)=3.3V, IOUT=1mA | 4 | |
| Dropout voltage (IOUT=300mA) | VDROP | 1200 | 1800 | mV | VEN=VIN, VOUT(S)=3.3V, IOUT=300mA | 4 | |
| Line regulation | ΔVOUT/(VOUT·ΔVIN) | 0.01 | 0.02 | ％/V | VOUT(S)+2V≤VIN≤40V, IOUT=1mA | 4 | |
| Load regulation (VOUT(S)≤5.3V row, applies to 3.6V) | VOUT2 | 20 | 40 | mV | VIN = VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)≤5.3V | 4 | |
| GND current, no load (3.0≤VOUT(S)≤5.3V row, applies to 3.6V) | IGND | 1 | 1.5 | 2.5 | uA | no load, VEN=VIN | 4 |
| Shutdown current | ISHUT | 0.1 | 1 | uA | VIN=40.0V, VEN=0 | 4 | |
| Input voltage | VIN | 2.2 | 40 | V | 4 | ||
| Maximum output current | IOUTMAX | 300 | 350 | mA | 4 | ||
| Current limit | ILIM | 350 | 550 | mA | VIN= VOUT(S)+2V, VOUT = 0.95×VOUT(S) | 4 | |
| Short circuit current | ISHORT | 65 | mA | VIN=VEN=VOUT(S)+2.0V, VOUT=0V | 4 | ||
| EN high-level voltage | VENH | 1.5 | 40 | V | 4 | ||
| EN low-level voltage | VENL | 0 | 0.6 | V | 4 | ||
| EN high-level current | IENH | -0.1 | 0.1 | uA | VIN=40V, VEN=VIN | 4 | |
| EN low-level current | IENL | -0.1 | 0.1 | uA | VIN=40V, VEN=0 | 4 | |
| Input voltage (absolute maximum) | VIN | -0.3 | 45 | V | Ta=25℃ unless otherwise indicated | 3 | |
| Power dissipation, SOT89-3 | PD | 1000 | mW | Ta=25℃ unless otherwise indicated | 3 | ||
| Thermal resistance junction-to-board, SOT89-3 | RθJB | 100 | ℃/W | Mounted on JEDEC standard 4layer (2s2p) PCB test board | 3 | ||
| Operating ambient temperature | Topr | -40 | 85 | ℃ | 3 | ||
| Storage temperature | Tstg | -40 | 125 | ℃ | 3 |
CAD (KiCad official)
- Symbol:
MD85A36PA1 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
md85a36pa1-etched.step/md85a36pa1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md85a36pa1.step/md85a36pa1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (13 pp, sha256
b57d90f008c009b2, retrieved 2026-10-18, 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).
# MD85A36PA1
**Shanghai Mingda Microelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L
MD85A36PA1 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; the datasheet specifies it as the ground reference for the regulator. |
| 2 | VIN | power_in | Power input pin; the input voltage range is 2.2V to 40V, with an absolute maximum of 45V (-0.3V to 45V). |
| 3 | VOUT | power_out | Regulated output voltage pin; VOUT must not exceed VIN+0.3V, otherwise reverse current through the parasitic diodes can destroy the IC. |
## 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 accuracy (printed tolerance) | VOUT | -2 | | 2 | % | | 1 |
| Temperature stability | ΔVOUT/(VOUT·ΔT) | -50 | | 50 | ppm/℃ | VIN = VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤125℃ | 4 |
| Dropout voltage (IOUT=1mA) | VDROP | | 4 | 8 | mV | VEN=VIN, VOUT(S)=3.3V, IOUT=1mA | 4 |
| Dropout voltage (IOUT=300mA) | VDROP | | 1200 | 1800 | mV | VEN=VIN, VOUT(S)=3.3V, IOUT=300mA | 4 |
| Line regulation | ΔVOUT/(VOUT·ΔVIN) | | 0.01 | 0.02 | ％/V | VOUT(S)+2V≤VIN≤40V, IOUT=1mA | 4 |
| Load regulation (VOUT(S)≤5.3V row, applies to 3.6V) | VOUT2 | | 20 | 40 | mV | VIN = VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)≤5.3V | 4 |
| GND current, no load (3.0≤VOUT(S)≤5.3V row, applies to 3.6V) | IGND | 1 | 1.5 | 2.5 | uA | no load, VEN=VIN | 4 |
| Shutdown current | ISHUT | | 0.1 | 1 | uA | VIN=40.0V, VEN=0 | 4 |
| Input voltage | VIN | 2.2 | | 40 | V | | 4 |
| Maximum output current | IOUTMAX | | 300 | 350 | mA | | 4 |
| Current limit | ILIM | | 350 | 550 | mA | VIN= VOUT(S)+2V, VOUT = 0.95×VOUT(S) | 4 |
| Short circuit current | ISHORT | | 65 | | mA | VIN=VEN=VOUT(S)+2.0V, VOUT=0V | 4 |
| EN high-level voltage | VENH | 1.5 | | 40 | V | | 4 |
| EN low-level voltage | VENL | 0 | | 0.6 | V | | 4 |
| EN high-level current | IENH | -0.1 | | 0.1 | uA | VIN=40V, VEN=VIN | 4 |
| EN low-level current | IENL | -0.1 | | 0.1 | uA | VIN=40V, VEN=0 | 4 |
| Input voltage (absolute maximum) | VIN | -0.3 | | 45 | V | Ta=25℃ unless otherwise indicated | 3 |
| Power dissipation, SOT89-3 | PD | | | 1000 | mW | Ta=25℃ unless otherwise indicated | 3 |
| Thermal resistance junction-to-board, SOT89-3 | RθJB | | 100 | | ℃/W | Mounted on JEDEC standard 4layer (2s2p) PCB test board | 3 |
| Operating ambient temperature | Topr | -40 | | 85 | ℃ | | 3 |
| Storage temperature | Tstg | -40 | | 125 | ℃ | | 3 |
## CAD (KiCad official)
- Symbol: `MD85A36PA1`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `md85a36pa1-etched.step` / `md85a36pa1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md85a36pa1.step` / `md85a36pa1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588917798341398528) (13 pp, sha256 `b57d90f008c009b2`, retrieved 2026-10-18, 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/md85a36pa1-datasheet.pdf)