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MD85A30PA1
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
markdownMD85A30PA1
Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L
MD85A30PA1 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, which the datasheet defines as the common ground for the regulator. |
| 2 | VIN | power_in | Power input pin, rated for an input voltage of 2.2V to 40V with an absolute maximum of 45V, and it should be bypassed with at least 2.2µF. |
| 3 | VOUT | power_out | Regulated output voltage pin, which must not be driven above VIN+0.3V to avoid reverse current damage through the parasitic diode. |
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) | 0.98 | 1.02 | V | VIN= VOUT(S)+2V, IOUT=1mA | 4 | |
| Input Voltage | VIN | 2.2 | 40 | V | 4 | ||
| Dropout Voltage | VDROP | 4 | 8 | mV | VEN=VIN, VOUT(S)=3.3V IOUT=1mA | 4 | |
| Dropout Voltage | VDROP | 1200 | 1800 | mV | VEN=VIN, VOUT(S)=3.3V IOUT=300mA | 4 | |
| Line Regulation | 0.01 | 0.02 | %/V | VOUT(S)+2V≤VIN≤40V IOUT =1mA | 4 | ||
| Load Regulation | VOUT2 | 20 | 40 | mV | VIN = VOUT(S)+2V 1mA≤IOUT≤300mA VOUT(S)≤5.3V | 4 | |
| Temperature Stability | -50 | 50 | ppm/℃ | VIN = VOUT(S)+2V，IOUT=10mA -40℃≤Ta≤125℃ | 4 | ||
| GND Current | IGND | 1 | 1.5 | 2.5 | uA | VEN=VIN, no load, 3.0≤VOUT(S)≤5.3V | 4 |
| Shutdown Current | ISHUT | 0.1 | 1 | uA | EN=0, VIN=40.0V, VEN=0 | 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 | ||
| Power Supply Rejection Ratio | PSRR | 79 | dB | f=100Hz, IOUT =10mA | 4 | ||
| Power Supply Rejection Ratio | PSRR | 62 | dB | f=1kHz, IOUT =10mA | 4 | ||
| Power Supply Rejection Ratio | PSRR | 48 | dB | f=10kHz, IOUT =10mA | 4 | ||
| Power Supply Rejection Ratio | PSRR | 40 | dB | f=100kHz, IOUT =10mA | 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 | |
| Over Temperature Protection | OTP | 170 | ℃ | IOUT=1mA | 4 | ||
| Input Voltage (absolute maximum) | VIN | -0.3 | 45 | V | 3 | ||
| Power Dissipation (SOT89-3) | PD | 1000 | mW | SOT89-3 | 3 | ||
| Thermal Resistance Junction-to-Board (SOT89-3) | RθJB | 100 | ℃/W | Mounted on JEDEC standard 4layer (2s2p) PCB test board | 3 | ||
| ESD Protection HBM | ESD HBM | 5000 | V | 3 | |||
| Operating Ambient Temperature | Topr | -40 | 85 | ℃ | 3 | ||
| Storage Temperature | Tstg | -40 | 125 | ℃ | 3 | ||
| Input Capacitor | CIN | 2.2 | µF | 3 | |||
| Output Capacitor | COUT | 2.2 | µF | 3 |
CAD (KiCad official)
- Symbol:
MD85A30PA1 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
md85a30pa1-etched.step/md85a30pa1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md85a30pa1.step/md85a30pa1.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 2026-10-17, 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).