# WL2836D33-4

**WILLSEMI(Will Semicon)** · Linear Voltage Regulators (LDO) · DFN1x1-4L

WL2836D33-4 from WILLSEMI(Will Semicon), in a DFN1x1-4L. 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, which for WL2836D33-4 is 3.3V within the stated 0.9V~3.3V output range. |
| 2 | GND | power_in | Ground reference pin; the datasheet states that the exposed pad EP at GND level must also connect to GND. |
| 3 | EN | input | Active-high enable; the datasheet gives EN logic high at 1V minimum and EN logic low at 0.4V maximum. |
| 4 | VIN | power_in | Input supply pin with an operating input voltage range of 1.4V to 5.5V. |
| 5 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI(Will Semicon) |
| Package | DFN1x1-4L |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage Tolerance |  | -1 |  | 1 | % | VOUT>2V | 1 |
| Input Voltage | VIN | 1.4 |  | 5.5 | V |  | 4 |
| Operating Supply voltage |  | 1.4 |  | 5.5 | V |  | 3 |
| Operating Temperature Range |  | -40 |  | 85 | oC |  | 3 |
| VIN Range | VIN | -0.3 |  | 6.5 | V |  | 3 |
| Storage Temperature Range |  | -55 |  | 150 | oC |  | 3 |
| Lead Temperature Range |  |  |  | 260 | oC |  | 3 |
| Operating Junction Temperature Range |  |  |  | 150 | oC |  | 3 |
| Power Dissipation | PD |  |  | 400 | mW | TA=25℃ | 3 |
| ESD HBM |  |  |  | 7500 | V |  | 3 |
| ESD MM |  |  |  | 300 | V |  | 3 |
| Dropout Voltage | VDROP |  | 118 | 185 | mV | VOUT=3.3V, IOUT=300mA | 4 |
| Line Regulation | △VLINE |  | 1 | 5 | mV | VIN=VOUT+0.5V~5.5V | 4 |
| Load Regulation | △VLoad |  | 15 | 28 | mV | IOUT=1~300mA | 4 |
| Quiescent Current | IQ |  | 50 | 90 | μA | VOUT=2.8V, IOUT=0 | 4 |
| EN logic high voltage | VENH | 1 |  |  | V | VIN=5.5V, IOUT=1mA | 4 |
| EN logic low voltage | VENL |  |  | 0.4 | V | VIN=5.5V, VOUT=0V | 4 |
| Thermal Resistance RθJA (DFN1x1-4L) | RθJA |  | 250 |  | oC/W |  | 3 |

## CAD (KiCad official)

- Symbol: `WL2836D33-4`
- Footprint: `Package_DFN_QFN:UDFN-4-1EP_1x1mm_P0.65mm_EP0.48x0.48mm`
- 3D model: DFN1x1-4L (KiCad packages3D, STEP)
- 3D model files: `wl2836d33-4-etched.step` / `wl2836d33-4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wl2836d33-4.step` / `wl2836d33-4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [WILLSEMI(Will Semicon) datasheet](docs/wl2836d33-4-datasheet.pdf) (14 pp, sha256 `40ed0001d5836acc`, retrieved 2026-10-28, 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](docs/wl2836d33-4-datasheet.pdf)