component
MD57E18QC3
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
markdownMD57E18QC3
Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-23-5L
MD57E18QC3 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 | VIN | power_in | Input supply pin; the datasheet specifies an input voltage range of 2.2 V to 5.5 V and recommends a 1.0 µF input capacitor. |
| 2 | GND | power_in | Ground reference pin for the regulator; the datasheet gives no separate limit for this pin. |
| 3 | EN | input | Enable pin with VENH minimum 0.85 V and VENL maximum 0.35 V, rated up to 5.5 V; it is internally pulled to GND through 1 MΩ. |
| 4 | NC | unconnected | No connection; the datasheet does not state a function for this pin. |
| 5 | VOUT | power_out | Regulated output pin for the 1.8 V option; the datasheet requires at least a 1 µF ceramic output capacitor and gives output voltage range 1.2 V to 4.5 V across the series. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-5L |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | 2.2 | 5.5 | V | 4 | ||
| Input Voltage Absolute Maximum | VIN | -0.3 | 6 | V | 3 | ||
| Line Regulation | ΔVOUT/ΔVIN | 0.02 | 0.1 | ％/V | VOUT(S)+1.0V≤VIN=VEN≤5.5V IOUT=10mA | 4 | |
| Line Transient (VIN rising) | VOUT_Line | -1 | mV | VIN= VOUT+1V to VOUT+2V in 30us | 4 | ||
| Line Transient (VIN falling) | VOUT_Line | 1 | mV | VIN= VOUT+2V to VOUT+1V in 30us | 4 | ||
| Load Regulation | VOUT2 | 10 | 20 | mV | VIN=VEN=VOUT(S)+1.0V 1mA≤IOUT≤300mA | 4 | |
| Load Transient (rising load) | VOUT_Load | -40 | mV | IOUT=1mA to 300mA in 10µs | 4 | ||
| Load Transient (falling load) | VOUT_Load | 40 | mV | IOUT=300mA to 1mA in 10µs | 4 | ||
| Temperature Stability | ΔVOUT/ΔT | -100 | 100 | ppm/℃ | VIN=VEN=VOUT(S)+1.0V IOUT=1mA, -40℃≤Ta≤125℃ | 4 | |
| GND Current (no load) | IGND | 20 | 30 | µA | VEN=VIN, no load | 4 | |
| GND Current (300mA) | IGND | 470 | µA | VEN=VIN, IOUT=300mA | 4 | ||
| Shutdown Current | ISHUT | 0.01 | 0.1 | µA | VIN=5.5V, VEN=0 | 4 | |
| Maximum Output Current | IOUTMAX | 250 | 300 | mA | 4 | ||
| Current Limit | ILIM | 500 | mA | VIN=VEN=VOUT(S)+1.0V, VOUT = 0.95 ×VOUT(S) | 4 | ||
| COUT Auto Discharge | RDCHG | 240 | Ω | VEN=0, VOUT=VOUT(S) | 4 | ||
| Power Supply Rejection Ratio at 1kHz | PSRR | 94 | dB | f=1kHz, IOUT=20mA | 4 | ||
| Power Supply Rejection Ratio at 10kHz | PSRR | 72 | dB | f=10kHz, IOUT=20mA | 4 | ||
| Power Supply Rejection Ratio at 100kHz | PSRR | 77 | dB | f=100kHz, IOUT=20mA | 4 | ||
| Power Supply Rejection Ratio at 1MHz | PSRR | 53 | dB | f=1MHz, IOUT=20mA | 4 | ||
| Output Noise Voltage | eN | 20 | µVRMS | IOUT=20mA | 4 | ||
| Start-Up Time | TSTART | 80 | 150 | µs | From VEN>VENH to VOUT=95% of VOUT | 4 | |
| Overshoot on Start-Up | VOUT_Start-up | 5 | % | Stated as a percentage of VOUT(S) | 4 | ||
| EN High Level Voltage | VENH | 0.85 | 5.5 | V | 4 | ||
| EN Low Level Voltage | VENL | 0 | 0.35 | V | 4 | ||
| EN High Level Current | IENH | -0.1 | 0.1 | µA | VIN=5.5V, VEN =VIN | 4 | |
| EN Low Level Current | IENL | -0.1 | 0.1 | µA | VIN=5.5V, VEN =0 | 4 | |
| Over Temperature Protection | OTP | 155 | ℃ | IOUT=1mA | 4 | ||
| Output Voltage Absolute Maximum | VOUT | -0.3 | V | VIN+0.3V | 3 | ||
| Power Dissipation SOT23-5L | PD | 250 | mW | SOT23-5L | 3 | ||
| Thermal Resistance Junction-to-Board SOT23-5L | RθJB | 180 | ℃/W | SOT23-5L, mounted on JEDEC standard 4layer (2s2p) PCB | 3 | ||
| Operating Ambient Temperature | Topr | -40 | 85 | ℃ | 3 | ||
| Storage Temperature | Tstg | -40 | 125 | ℃ | 3 | ||
| ESD Protection HBM | ESD HBM | 6000 | V | 3 |
CAD (KiCad official)
- Symbol:
MD57E18QC3 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
md57e18qc3-etched.step/md57e18qc3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md57e18qc3.step/md57e18qc3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (12 pp, sha256
42680ba6ee0683b4, retrieved 2026-10-27, 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).