component
MD85Q33QC3
Public Made by Adomby adom
Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownMD85Q33QC3
Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-23-5L
MD85Q33QC3 from Shanghai Mingda Microelectronics, in a SOT-23-5L. 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. |
| 2 | VIN | power_in | Power input pin; operating input range 2.2V to 40V (absolute maximum 45V). |
| 3 | EN | input | Enable pin; drive high (VENH 1.5V min to 40V) to enable the device, drive low (VENL 0.6V max) for low-current shutdown. |
| 4 | NC | unconnected | No internal connection. |
| 5 | VOUT | power_out | Regulated output voltage pin (3.3V for MD8533Q), up to 300mA, with 1uF or larger output capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-5L |
| Category | Power Supply Chip |
| Pins | 5 |
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 | 1.02 | xVOUT(S) | VIN=VOUT(S)+2V, IOUT=1mA; VOUT(S)=3.3V | 6 |
| Dropout Voltage | VDROP | 4 | 8 | mV | VEN=VIN, VOUT(S)=3.3V, IOUT=1mA | 6 | |
| Dropout Voltage | VDROP | 1200 | 1800 | mV | VEN=VIN, VOUT(S)=3.3V, IOUT=300mA | 6 | |
| Line Regulation | 0.01 | 0.02 | %/V | VOUT(S)+2V≤VIN≤40V, IOUT=1mA | 6 | ||
| Load Regulation | ΔVOUT2 | 25 | 50 | mV | VIN=VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)≤5.3V | 6 | |
| Temperature Stability | -50 | 50 | ppm/℃ | VIN=VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤125℃ | 6 | ||
| GND Current | IGND | 1 | 1.5 | 2.5 | uA | VEN=VIN, no load, 3.0≤VOUT(S)≤5.3V | 6 |
| Shutdown Current | ISHUT | 0.1 | 1 | uA | VIN=40.0V, VEN=0 | 6 | |
| Input Voltage | VIN | 2.2 | 40 | V | 6 | ||
| Maximum Output Current | IOUTMAX | 300 | mA | 6 | |||
| Current Limit | ILIM | 350 | 550 | mA | VIN=VOUT(S)+2V, VOUT=0.95×VOUT(S) | 6 | |
| EN 'H' Level Voltage | VENH | 1.5 | 40 | V | 6 | ||
| EN 'L' Level Voltage | VENL | 0 | 0.6 | V | 6 | ||
| EN 'H' Level Current | IENH | -0.1 | 0.1 | uA | VIN=40V, VEN=VIN | 6 | |
| EN 'L' Level Current | IENL | -0.1 | 0.1 | uA | VIN=40V, VEN=0 | 6 | |
| Input Voltage (absolute maximum) | VIN | -0.3 | 45 | V | Ta=25℃ | 5 | |
| Output Voltage (absolute maximum) | VOUT | -0.3 | 0.3 | V | Vss-0.3 ~ VIN+0.3V (max is the +0.3V offset above VIN) | 5 | |
| Power Dissipation | PD | 250 | mW | SOT23-5 | 5 | ||
| Operating Ambient Temperature | Topr | -40 | 85 | ℃ | 5 | ||
| Storage Temperature | Tstg | -40 | 125 | ℃ | 5 | ||
| ESD Protection HBM | ESD | 5000 | V | HBM | 5 | ||
| Thermal Resistance | RθJA | 180 | ℃/W | SOT23-5 | 5 | ||
| GND Current | IGND | 420 | uA | IOUT=100mA | 6 | ||
| Short Circuit Current | ISHORT | 65 | mA | VIN=VEN=VOUT(S)+2.0V, VOUT=0V | 6 | ||
| Power Supply Rejection Ratio | PSRR | 79 | dB | f=100Hz, IOUT=10mA | 6 | ||
| Power Supply Rejection Ratio | PSRR | 62 | dB | f=1kHz, IOUT=10mA | 6 | ||
| Power Supply Rejection Ratio | PSRR | 48 | dB | f=10kHz, IOUT=10mA | 6 | ||
| Power Supply Rejection Ratio | PSRR | 40 | dB | f=100kHz, IOUT=10mA | 6 | ||
| Over Temperature Protection | OTP | 170 | ℃ | IOUT=1mA | 6 |
CAD (KiCad official)
- Symbol:
MD85Q33QC3 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
md85q33qc3-etched.step/md85q33qc3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md85q33qc3.step/md85q33qc3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (17 pp, sha256
38727c99a8471351, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).