# MG6226D4-18

**Megain** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · DFN-4L(1x1)

MG6226D4-18 from Megain, in a DFN-4L(1x1). 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 | VOUT | power_out | Regulated output voltage pin, rated up to 300 mA, with output accuracy of ±2% over temperature. |
| 2 | GND | power_in | Ground pin. |
| 3 | EN | input | Enable pin; the datasheet lists VENHI as 0.6 V and VENLO as 0.2 V. |
| 4 | VIN | power_in | Input voltage pin; recommended input range is 2.5 V to 5.5 V, with an absolute maximum of -0.3 V to +6.5 V. |
| 5 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Megain |
| Package | DFN-4L(1x1) |
| 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 accuracy | VOUT | -2 |  | 2 | % |  | 3 |
| Input voltage (absolute maximum) | VIN | -0.3 |  | 6.5 | V |  | 3 |
| Junction temperature (absolute maximum) | TJ |  |  | 150 | ℃ |  | 3 |
| Power dissipation | PD |  |  | 0.4 | W | DFN1X1 package | 3 |
| Storage temperature | Tstg | -65 |  | 150 | ℃ |  | 3 |
| Soldering temperature |  |  |  | 300 | ℃ | 焊接时间≤10S | 3 |
| Thermal resistance, junction to ambient | RθJA |  | 250 |  | ⁰C/W |  | 3 |
| Input voltage (recommended operating) | VIN | 2.5 |  | 5.5 | V |  | 3 |
| Operating temperature | TA | -40 |  | 85 | ℃ |  | 3 |
| Junction temperature range (recommended operating) | TJ | -40 |  | 125 | ℃ |  | 3 |
| Line regulation | △VLINE |  | 20 | 50 | mV | VIN = VOUT + 1V ~5.5V | 3 |
| Load regulation | △VLOAD |  |  | 1.5 | % | IOUT = 1mA ~300mA | 3 |
| Dropout voltage | VDROP |  |  | 180 | mV | IOUT = 100mA, VOUT =1.8V | 3 |
| Dropout voltage | VDROP |  |  | 600 | mV | IOUT = 300mA, VOUT =1.8V | 3 |
| Quiescent current | IQ |  | 0.5 | 1 | uA |  | 4 |
| Current limit | ICL | 360 |  | 560 | mA |  | 4 |
| Enable high level | VENHI | 0.6 |  |  | V |  | 4 |
| Enable low level | VENLO |  |  | 0.2 | V |  | 4 |
| Ripple rejection (PSRR) | PSRR | 45 |  |  | dB | f=1KHz | 4 |
| Thermal shutdown | TSD |  | 150 |  | ℃ |  | 4 |
| Thermal shutdown hysteresis | TSDHY |  | 20 |  | ℃ |  | 4 |

## CAD (KiCad official)

- Symbol: `MG6226D4-18`
- Footprint: `Package_DFN_QFN:UDFN-4-1EP_1x1mm_P0.65mm_EP0.48x0.48mm`
- 3D model: DFN-4L(1x1) (KiCad packages3D, STEP)
- 3D model files: `mg6226d4-18-etched.step` / `mg6226d4-18-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mg6226d4-18.step` / `mg6226d4-18.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Megain datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603015257820983296) (9 pp, sha256 `9adf0b2149c90b01`, retrieved 2026-10-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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](docs/mg6226d4-18-datasheet.pdf)