component
MD7218A33PA1
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.
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
markdownMD7218A33PA1
Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3L
MD7218A33PA1 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; the datasheet gives no electrical limit specific to this pin. |
| 2 | VOUT | power_out | Regulated output of the MD7218A33 (3.3 V nominal, ±2% accuracy); VOUT must not exceed VIN+0.3V, and the absolute maximum range is Vss-0.3 V to VIN+0.3 V. |
| 3 | VIN | power_in | Input supply pin with an absolute maximum rating of -0.3 V to 15 V; the Electrical Characteristics give an operating input voltage range of 2.2 V to 18 V. |
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 Accuracy (tolerance) | VOUT(S) | -2 | 2 | % | 2 | ||
| Output Voltage | 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 | ΔVOUT/ΔVIN | 0.01 | 0.02 | ％/V | VOUT(S)+2V≤VIN≤15V, IOUT=1mA | 4 | |
| Load Regulation | VOUT2 | 80 | mV | VIN=VOUT(S)+2V, 1mA≤IOUT≤1A, VOUT(S)≤5.0V | 4 | ||
| Temperature Stability | ΔVOUT/ΔT | -50 | 50 | ppm/℃ | VIN=VOUT(S)+2V, IOUT=1mA, -40℃≤Ta≤125℃ | 4 | |
| GND Current | IGND | 1 | 1.6 | 2 | µA | no load, VOUT(S)≤5.0V | 4 |
| Input Voltage | VIN | 2.2 | 18 | V | 4 | ||
| Maximum Output Current | IOUTMAX | 1 | A | 4 | |||
| Input Voltage (absolute maximum) | VIN | -0.3 | 15 | V | 3 | ||
| Power Dissipation | PD | 1000 | mW | SOT89-3L | 3 | ||
| Operating Ambient Temperature | Topr | -40 | 85 | ℃ | 3 | ||
| Storage Temperature | Tstg | -40 | 125 | ℃ | 3 | ||
| ESD Protection HBM | ESD HBM | 4000 | V | 3 | |||
| GND Current | IGND | 420 | µA | IOUT=100mA | 4 | ||
| Current Limit | ILIM | 1.5 | A | VIN=VOUT(S)+2V, VOUT=0.95×VOUT(S) | 4 | ||
| Power Supply Rejection Ratio | PSRR | 71 | dB | f=10Hz, IOUT=10mA | 4 | ||
| Power Supply Rejection Ratio | PSRR | 70 | dB | f=100Hz, IOUT=10mA | 4 | ||
| Power Supply Rejection Ratio | PSRR | 51 | dB | f=1kHz, IOUT=10mA | 4 | ||
| Short Circuit Current | ISHORT | 30 | mA | VIN=VOUT(S)+2.0V, VOUT=0V | 4 | ||
| Over Temperature Protection | OTP | 150 | ℃ | IOUT=1mA | 4 | ||
| Thermal Resistance Junction-to-Board | RθJB | 100 | ℃/W | SOT89-3L, mounted on JEDEC standard 4-layer (2s2p) PCB test board | 3 |
CAD (KiCad official)
- Symbol:
MD7218A33PA1 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
md7218a33pa1-etched.step/md7218a33pa1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md7218a33pa1.step/md7218a33pa1.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 2026-11-05, 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).