component
WR0332-28A50R
Public Made by Adomby adom
Wayon Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. 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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Contents
README
markdownWR0332-28A50R
Wayon · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
WR0332-28A50R from Wayon, in a SOT-23-5. 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 | IN | power_in | Input voltage supply; bypass with a typical 1µF capacitor to GND, placed as close to the IN and GND pins as possible. |
| 2 | GND | power_in | Common ground. |
| 3 | EN | input | Active-high enable input with a small internal pull-up current source, nominally 0.1µA. |
| 4 | NC | unconnected | Not connected. |
| 5 | OUT | power_out | Regulated output voltage requiring a low-ESR capacitor, typically 1µF, from OUT to ground for stability, placed as close to OUT and GND as possible; an internal 150Ω (typical) pull-down resistor discharges VOUT when the regulator shuts down. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Wayon |
| Package | SOT-23-5 |
| 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 |
|---|---|---|---|---|---|---|---|
| Dropout voltage (VOUT=2.8V variant) | VDO | 250 | 375 | mV | VOUT=2.8V, 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 | 1 | 3.3 | V | 4 | ||
| Output current | IOUT | 0 | 300 | mA | 4 | ||
| Operating temperature range | TA | -40 | 125 | °C | 4 | ||
| Input voltage range | VIN | -0.3 | 6 | V | 3 | ||
| EN input voltage range | VEN | -0.3 | 6 | V | 3 | ||
| Output voltage range | VOUT | -0.3 | 6 | V | 3 | ||
| Maximum output current | 500 | mA | 3 | ||||
| Power dissipation PD(MAX) SOT23-5 | PD(MAX) | 1046 | 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 | -8000 | 8000 | V | HBM | 3 | ||
| Thermal resistance junction-to-ambient SOT23-5 | RθJA | 119.4 | °C/W | 3 | |||
| Thermal resistance junction-to-board SOT23-5 | RθJB | 89.1 | °C/W | 3 | |||
| Thermal resistance junction-to-case top SOT23-5 | RθJC (Top) | 48.9 | °C/W | 3 | |||
| Thermal resistance junction-to-case bottom SOT23-5 | RθJC (Bottom) | 26.36 | °C/W | 3 | |||
| Output current limit | ILIM | 500 | mA | VEN=VIN | 5 | ||
| Maximum output current in the 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 at 1 kHz | PSRR | 70 | dB | VIN=(VOUT+1V) DC+0.5VP-P, f=1kHz, IOUT=10mA, @VOUT=3.3V | 5 | ||
| Power supply ripple rejection at 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 |
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:
WR0332-28A50R - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
wr0332-28a50r-etched.step/wr0332-28a50r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wr0332-28a50r.step/wr0332-28a50r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Wayon datasheet (30 pp, sha256
115200abc938e7fe, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).