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MD57E33QC3

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Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD57E33QC3

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L

MD57E33QC3 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, with an operating input voltage range of 2.2 V to 5.5 V and an absolute maximum VIN of -0.3 V to 6.0 V, requiring a 1 µF input capacitor.
2 GND power_in Ground reference pin for the regulator.
3 EN input Enable input with VENH minimum 0.85 V and VENL maximum 0.35 V; it is internally pulled low to GND through 1 MΩ, and a low level disables the device and activates the output auto-discharge.
4 NC unconnected Labelled NC on the pin configuration; the datasheet gives no function for this pin.
5 VOUT power_out Regulated output pin, with output voltage range 1.2 V to 4.5 V and maximum output current of 300 mA, requiring a 1 µF ceramic output capacitor placed within up to 10 cm of the device.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-5L
Category Power Management (PMIC)
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 Tolerance VOUT(S) -2 2 % VIN=VOUT(S)+1.0V, IOUT=1mA, VOUT(S)≥2.0V 4
Input Voltage VIN 2.2 5.5 V 4
EN 'H' Level Voltage VENH 0.85 5.5 V 4
EN 'L' Level Voltage VENL 0 0.35 V 4
EN 'H' Level Current IENH -0.1 0.1 µA VIN=5.5V, VEN=VIN 4
EN 'L' Level Current IENL -0.1 0.1 µA VIN=5.5V, VEN=0 4
Dropout Voltage VDROP 120 mV VEN=VIN, VOUT≥3V, IOUT=300mA 4
Line Regulation 0.02 0.1 %/V VOUT(S)+1.0V≤VIN=VEN≤5.5V, IOUT=10mA 4
Line Transient VOUT_Line -1 mV VIN=VOUT+1V to VOUT+2V in 30us 4
Line Transient 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 VOUT_Load -40 mV IOUT=1mA to 300mA in 10µs 4
Load Transient VOUT_Load 40 mV IOUT=300mA to 1mA in 10µs 4
Temperature Stability -100 100 ppm/℃ VIN=VEN=VOUT(S)+1.0V, IOUT=1mA, -40℃≤Ta≤125℃ 4
GND Current (no load) IGND 20 30 µA no load (VEN=VIN) 4
GND Current (IOUT=300mA) IGND 470 µA IOUT=300mA (VEN=VIN) 4
Shutdown Current ISHUT 0.01 0.1 µA VIN=5.5V, VEN=0 4
Maximum Output Current IOUTMAX 250 300 mA 4
Output Overshoot on Start-Up VOUT_Start-up 5 % Stated as a percentage of VOUT(S) 4
Start-Up Time TSTART 80 150 µs From VEN>VENH to VOUT=95% of VOUT 4
Absolute Max Input Voltage VIN -0.3 6 V 3
Absolute Max Output Voltage VOUT -0.3 V Upper limit printed as VIN+0.3V 3
Power Dissipation PD 250 mW SOT23-5L 3
ESD Protection ESD HBM 6000 V HBM 3
Storage Temperature Tstg -40 125 ℃ 3
Thermal Resistance Junction-to-Board RθJB 180 ℃/W SOT23-5L, mounted on JEDEC standard 4-layer (2s2p) PCB 3
Operating Ambient Temperature Topr -40 85 ℃ 3
Operating Junction Temperature TJ -40 125 ℃ 1
Input Capacitor (CIN) CIN 1 µF Notes on use 3
Output Capacitor Range COUT 1 10 µF 10
Input/Output Capacitor ESR Range ESR 5 500 mΩ 10
Current Limit ILIM 500 mA VIN=VEN=VOUT(S)+1.0V, VOUT = 0.95×VOUT(S) 4
Output Auto Discharge Resistance RDCHG 240 Ω VEN=0, VOUT=VOUT(S) 4
Power Supply Rejection Ratio PSRR 94 dB f=1kHz, IOUT=20mA 4
Power Supply Rejection Ratio PSRR 72 dB f=10kHz, IOUT=20mA 4
Power Supply Rejection Ratio PSRR 77 dB f=100kHz, IOUT=20mA 4
Power Supply Rejection Ratio PSRR 53 dB f=1MHz, IOUT=20mA 4
Output Noise Voltage eN 20 µVRMS IOUT=20mA 4
Over Temperature Protection OTP 155 ℃ IOUT=1mA 4

CAD (KiCad official)

  • Symbol: MD57E33QC3
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: md57e33qc3-etched.step / md57e33qc3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md57e33qc3.step / md57e33qc3.glb are 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 2026-10-18, 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