# WR0332-25A30R

**Wayon** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3

WR0332-25A30R from Wayon, in a SOT-23-3. 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 | Common ground reference for the regulator. |
| 2 | OUT | power_out | Regulated output voltage; a low-ESR capacitor, typically 1μF, is required from OUT to ground for stability, and an internal 150Ω (typical) pull-down resistor discharges VOUT when the regulator shuts down. |
| 3 | IN | power_in | Input voltage supply, with a typical 1μF bypass capacitor to GND placed as close to the IN and GND pins as possible; the rated input range is 2.2V to 5.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Wayon |
| Package | SOT-23-3 |
| 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 range (VOUT > 1.5V), IOUT=1mA, VIN=VOUT+1V | VOUT | 0.98 |  | 1.02 | VOUT multiplier (printed as 0.98 VOUT / 1.02 VOUT, unit column V) | VOUT>1.5V, IOUT=1mA | 5 |
| Dropout voltage (VOUT=2.5V) | VDO |  | 280 | 420 | mV | VOUT=2.5V, IOUT=300mA | 5 |
| Line regulation | LNR |  | 0.05 | 0.1 | %/V | VOUT=3.3V, VIN=4.3~5.5V, IOUT=1mA | 5 |
| Quiescent current | IQ |  | 60 | 80 | μA | VOUT=3.3V, IOUT=0mA | 5 |
| Shut-down current | ISHDN |  | 0.1 | 1 | μA | VEN = 0V | 5 |
| Input voltage range | VIN | 2.2 |  | 5.5 | V |  | 4 |
| EN input voltage range | VEN | 0 |  | 5.5 | V |  | 4 |
| Nominal output voltage range | VOUT(NOMINAL) | 1 |  | 3.3 | V | Family range for WR0332 (not specific to 2.5V variant) | 4 |
| Output current | IOUT | 0 |  | 300 | mA |  | 4 |
| Operating temperature range | TA | -40 |  | 125 | °C |  | 4 |
| Input voltage range (absolute) |  | -0.3 |  | 6 | V |  | 3 |
| EN input voltage range (absolute) |  | -0.3 |  | 6 | V |  | 3 |
| Output voltage range (absolute) |  | -0.3 |  | 6 | V |  | 3 |
| Maximum output current |  |  |  | 500 | mA | Footnote [2] (PCB per note 2) | 3 |
| Power dissipation PD(MAX), SOT23-3 | PD(MAX) |  |  | 681 | mW | TA = 25ºC | 3 |
| Junction temperature | TJ |  |  | 150 | °C |  | 3 |
| Lead temperature range |  |  |  | 260 | °C |  | 3 |
| Storage temperature range |  | -55 |  | 150 | °C |  | 3 |
| ESD susceptibility HBM | HBM | -8000 |  | 8000 | V | HBM, printed ±8000 V | 3 |
| Input capacitor (recommended) | CIN |  | 1 |  | μF |  | 4 |
| Output capacitor (recommended) | COUT |  | 1 |  | μF |  | 4 |
| Output current limit | ILIM |  | 500 |  | mA | VEN=VIN | 5 |
| Maximum output current in accuracy range | IOUT |  | 300 |  | mA | VEN=VIN | 5 |
| Short current | ISHORT |  | 150 |  | mA | VEN=VIN, VOUT short to GND | 5 |
| Load regulation | LDR |  | 15 |  | mV | VOUT=3.3V, IOUT=1~300mA | 5 |
| Power supply ripple rejection (1 kHz) | PSRR |  | 70 |  | dB | VIN=(VOUT+1V) DC+0.5VP-P, f=1kHz, IOUT=10mA, @VOUT=3.3V | 5 |
| Power supply ripple rejection (10 kHz) | PSRR |  | 55 |  | dB | VIN=(VOUT+1V) DC+0.5VP-P, f=10kHz, IOUT=10mA, @VOUT=3.3V | 5 |
| Output noise voltage | VNO |  | 140 |  | µVRMS | BW = 10Hz to 100kHz, VOUT = 3.3 V, IOUT = 10 mA, COUT=1μF | 6 |
| EN high voltage (enabled) | VENH |  | 1.2 |  | V | VIN=5.5V, IOUT=1mA | 6 |
| EN low voltage (disabled) | VENL |  | 0.4 |  | V | VIN=5.5V, IOUT=1mA | 6 |
| Thermal shutdown threshold | TSD |  | 165 |  | ºC |  | 6 |
| Thermal shutdown hysteresis | ΔTSD |  | 30 |  | ºC |  | 6 |
| Output discharge resistance | RDIS |  | 150 |  | Ω | VIN=4.0V, VEN=0V | 6 |
| Thermal resistance junction-to-ambient, SOT23-3 | RθJA |  | 183.3 |  | °C/W | 2cm x 2cm 2-layer FR4, 1 oz copper (note 2) | 3 |
| Thermal resistance junction-to-board, SOT23-3 | RθJB |  | 148.1 |  | °C/W | JEDEC board (note 3) | 3 |
| Thermal resistance junction-to-case top, SOT23-3 | RθJC |  | 119.2 |  | °C/W | Top | 3 |
| Thermal resistance junction-to-case bottom, SOT23-3 | RθJC |  | 31.75 |  | °C/W | Bottom | 3 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | close as possible to their respective LDO pins. Connect the CIN and COUT grounds, with all LDO ground pins as close together as possible, through a wide copper surface. Using through-holes and long wi | 22 |

## CAD (KiCad official)

- Symbol: `WR0332-25A30R`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `wr0332-25a30r-etched.step` / `wr0332-25a30r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wr0332-25a30r.step` / `wr0332-25a30r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Wayon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756932485231841280) (30 pp, sha256 `115200abc938e7fe`, 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](docs/wr0332-25a30r-datasheet.pdf)