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MD58E33QA3
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Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3L. 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
markdownMD58E33QA3
Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3L
MD58E33QA3 from Shanghai Mingda Microelectronics, in a SOT-23-3L. 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, bottom-left in the SOT-23-3L top view. |
| 2 | VOUT | power_out | Regulated output (3.3 V for MD58E33QA3, ±2%) delivering up to 500 mA, needs at least a 1 µF ceramic output capacitor which may sit up to 10 cm away. |
| 3 | VIN | power_in | Input supply, 2.2 V to 5.5 V (absolute maximum -0.3 V to 6.0 V), with a 1 µF or larger input capacitor recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-3L |
| 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 Tolerance | -2 | 2 | % | 1 | |||
| Output Voltage (VOUT(S) multiplier, 2.0 V and above) | VOUT(S) | 0.98 | 1.02 | ×VOUT(S) | 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 | 1.1 | 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 | |
| Maximum Output Current | IOUTMAX | 450 | 500 | mA | 4 | ||
| Current Limit | ILIM | 750 | mA | VIN=VEN=VOUT(S)+1.0V, VOUT = 0.95 ×VOUT(S) | 4 | ||
| Dropout Voltage (VOUT≥3V) | VDROP | 220 | mV | VEN=VIN, IOUT=500mA | 4 | ||
| Line Regulation | ΔVOUT/ΔVIN | 0.02 | 0.1 | %/V | VOUT(S)+1.0V≤VIN=VEN≤5.5V, IOUT=10mA | 4 | |
| Line Transient (VIN step up) | VOUT_Line | -1 | mV | VIN= VOUT+1V to VOUT+2V in 30us | 4 | ||
| Line Transient (VIN step down) | VOUT_Line | 1 | mV | VIN= VOUT+2V to VOUT+1V in 30us | 4 | ||
| Load Regulation | VOUT2 | 20 | 40 | mV | VIN=VEN=VOUT(S)+1.0V, 1mA≤IOUT≤500mA | 4 | |
| Load Transient (IOUT 1mA to 500mA) | VOUT_Load | -50 | mV | IOUT=1mA to 500mA in 10µs | 4 | ||
| Load Transient (IOUT 500mA to 1mA) | VOUT_Load | 50 | mV | IOUT=500mA to 1mA in 10µs | 4 | ||
| Output Voltage Temperature Stability | ΔVOUT/ΔT | -60 | 60 | ppm/℃ | VIN=VEN=VOUT(S)+1.0V, IOUT=1mA, -40℃≤Ta≤125℃ | 4 | |
| GND Current (no load) | IGND | 20 | 40 | µA | no load, VEN=VIN | 4 | |
| GND Current (IOUT=500mA) | IGND | 680 | µA | IOUT=500mA, VEN=VIN | 4 | ||
| Shutdown Current | ISHUT | 0.01 | 0.1 | µA | VIN=5.5V, VEN=0 | 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 | ||
| Over Temperature Protection | OTP | 155 | ℃ | IOUT=1mA | 4 | ||
| Power Supply Rejection Ratio | PSRR | 91 | dB | f=1kHz, IOUT=20mA | 4 | ||
| Power Supply Rejection Ratio | PSRR | 71 | dB | f=10kHz, IOUT=20mA | 4 | ||
| Power Supply Rejection Ratio | PSRR | 59 | dB | f=100kHz, IOUT=20mA | 4 | ||
| Power Supply Rejection Ratio | PSRR | 57 | dB | f=1MHz, IOUT=20mA | 4 | ||
| Output Noise Voltage | eN | 10 | µVRMS | IOUT=20mA | 4 | ||
| COUT Auto Discharge Resistance | RDCHG | 240 | Ω | VEN=0, VOUT=VOUT(S) | 4 | ||
| Output Voltage (nominal for MD58E33QA3) | VOUT(S) | 3.3 | V | Product selection for MD58E33QA3 | 2 | ||
| Input Voltage (absolute maximum) | VIN | -0.3 | 6 | V | 3 | ||
| Output Voltage (absolute maximum) | VOUT | -0.3 | V | Printed as VIN+0.3V (upper limit not numeric) | 3 | ||
| Power Dissipation SOT23-3L | PD | 250 | mW | SOT23-3L | 3 | ||
| Operating Ambient Temperature | Topr | -40 | 85 | ℃ | 3 | ||
| Storage Temperature | Tstg | -40 | 125 | ℃ | 3 | ||
| ESD Protection HBM | ESD HBM | 6000 | V | HBM | 3 | ||
| Thermal Resistance Junction-to-Ambient SOT23-3L | RθJA | 180 | ℃/W | SOT23-3L | 3 | ||
| Output Capacitor (COUT) range | COUT | 1 | 10 | µF | Design requirements | 10 | |
| Input/Output Capacitor ESR range | ESR | 5 | 500 | mΩ | Design requirements | 10 | |
| Operating Junction Temperature | TJ | -40 | 125 | ℃ | 10 |
CAD (KiCad official)
- Symbol:
MD58E33QA3 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files:
md58e33qa3-etched.step/md58e33qa3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md58e33qa3.step/md58e33qa3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (13 pp, sha256
cb55a1cc3620e7f3, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).