# MD52E25QC3

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

MD52E25QC3 from Shanghai Mingda Microelectronics, in a SOT-23-5L. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Positive supply input, 2.2V to 7.0V operating range (absolute max 8V). Bypass to GND with a ceramic capacitor ≥1.0μF placed close to the pin. |
| 2 | GND | power_in | Device ground reference. All internal voltages, the reference, and the feedback divider return here. |
| 3 | EN | input | Active-high enable input. VENH ≥ 1.0V (up to VIN, max 7.0V) turns the regulator on; VENL ≤ 0.38V puts the device into shutdown (ISHUT = 10nA typ at VIN=7.0V) and activates the internal COUT auto-discharge path (RDCHG ≈ 280-640Ω). Input current is ±0.1μA max; do not leave floating. |
| 4 | NC | unconnected | No internal connection. Leave floating or tie to GND for mechanical robustness. |
| 5 | VOUT | power_out | Regulated 2.5V output (±2% accuracy). Delivers up to 500mA with 230mV dropout at IOUT=500mA. Requires a low-ESR ceramic output capacitor ≥1.0μF for stability; do not force this pin above VIN+0.3V (reverse current via the P-MOSFET parasitic diode can destroy the IC). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-5L |
| Category | Power Management (PMIC) |
| Pins | 5 |

## Ordering variants

Same part, different packaging or reel option.

- `MD52E25QC3`
- `MD52E28QC3`
- `MD52E30QC3`
- `MD52E33QC3`
- `MD52E36QC3`
- `MD52E40QC3`
- `MD52E50QC3`
- `MD52E25QA3`
- `MD52E28QA3`
- `MD52E30QA3`
- `MD52E33QA3`
- `MD52E36QA3`
- `MD52E40QA3`
- `MD52E50QA3`
- `MD52A25PA1`
- `MD52A28PA1`
- `MD52A30PA1`
- `MD52A33PA1`
- `MD52A36PA1`
- `MD52A40PA1`
- `MD52A50PA1`
- `MD52E25WB6`
- `MD52E28WB6`
- `MD52E30WB6`
- `MD52E33WB6`
- `MD52E36WB6`
- `MD52E40WB6`
- `MD52E50WB6`

## 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 (VOUT(S)≥2.0V) | VOUT | -2 |  | 2 | % | VIN=VOUT(S)+1.0V, IOUT=10mA | 4 |
| Dropout voltage (VOUT<3V) | VDROP |  |  | 240 | mV | VEN=VIN, IOUT=500mA | 4 |
| Line regulation |  |  | 0.05 | 0.1 | %/V | VOUT(S)+0.5V≤VIN=VEN≤7V, IOUT=10mA | 4 |
| Load regulation |  |  | 50 | 90 | mV | VIN=VEN=VOUT(S)+1.0V, 1mA≤IOUT≤500mA | 4 |
| Temperature stability |  | -50 |  | 50 | ppm/℃ | VIN=VEN=VOUT(S)+1.0V, IOUT=1mA, -40℃≤Ta≤125℃ | 4 |
| GND current (no load) | IGND |  | 0.6 | 0.9 | μA | no load, VEN=VIN | 4 |
| GND current (IOUT=500mA) | IGND |  |  | 210 | μA | IOUT=500mA | 4 |
| Shutdown current | ISHUT |  | 0.01 | 0.1 | μA | VIN=7.0V, VEN=0 | 4 |
| EN 'H' level voltage | VENH | 1 |  | 7 | V |  | 4 |
| EN 'L' level voltage | VENL | 0 |  | 0.38 | V |  | 4 |
| EN 'H' level current | IENH | -0.1 |  | 0.1 | μA | VIN=7.0V, VEN=VIN | 4 |
| EN 'L' level current | IENL | -0.1 |  | 0.1 | μA | VIN=7.0V, VEN=0 | 4 |
| Input voltage range | VIN | 2.2 |  | 7 | V |  | 4 |
| Maximum output current | IOUTMAX | 450 |  | 500 | mA |  | 4 |
| COUT auto-discharge resistance | RDCHG | 280 | 450 | 640 | Ω | VEN=0, VOUT=VOUT(S) | 4 |
| Current limit | ILIM |  |  | 750 | mA | VIN=VEN=VOUT(S)+1.0V, VOUT = 0.95 ×VOUT(S) | 4 |
| Short circuit current | ISHORT |  |  | 50 | mA | VIN=VEN=VOUT(S)+1.0V, VOUT=0V | 4 |
| Power supply rejection ratio (f=10Hz) | PSRR |  | 64 |  | dB | f=10Hz, IOUT=10mA | 4 |
| Power supply rejection ratio (f=100Hz) | PSRR |  | 51 |  | dB | f=100Hz, IOUT=10mA | 4 |
| Power supply rejection ratio (f=1kHz) | PSRR |  | 34 |  | dB | f=1kHz, IOUT=10mA | 4 |
| Input voltage (absolute maximum) | VIN | -0.3 |  | 8 | V |  | 3 |
| Power dissipation (SOT23-5) | PD |  |  | 250 | mW | SOT23-5 package | 3 |
| Thermal resistance junction-to-board (SOT23-5) | RθJB |  |  | 180 | ℃/W | SOT23-5; mounted on JEDEC standard 4-layer (2s2p) PCB | 3 |
| Operating ambient temperature | Topr | -40 |  | 85 | ℃ |  | 3 |
| Storage temperature | Tstg | -40 |  | 125 | ℃ |  | 3 |
| ESD protection (HBM) | ESD HBM |  |  | 6000 | V |  | 3 |
| Input capacitor (CIN) | CIN | 1 |  |  | µF | Notes on use: input capacitor 1.0µF above | 3 |
| Output capacitor (COUT) | COUT | 1 |  |  | µF | Notes on use: output capacitor 1.0µF above | 3 |
| Nominal output voltage (MD52E25QC3) | VOUT |  | 2.5 |  | V | product selection for MD52E25QC3 | 2 |

## CAD (KiCad official)

- Symbol: `MD52E25QC3`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files: `md52e25qc3-etched.step` / `md52e25qc3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md52e25qc3.step` / `md52e25qc3.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918005271310337) (None pp, sha256 `4168b8cf3e52f15f`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/md52e25qc3-datasheet.pdf)