component
WL9100S3-50B
Public Made by Adomby adom
WPMtek Wei Pan Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT23-3L. 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
markdownWL9100S3-50B
WPMtek Wei Pan Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT23-3L
WL9100S3-50B from WPMtek Wei Pan Microelectronics, in a SOT23-3L. 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 | Ground pin; the input and output capacitor ground connections must return to this pin through as wide and as short a copper trace as practical. |
| 2 | VOUT | power_out | Regulated output for the 5.0V version, rated up to 150mA with an absolute maximum of -0.3 to 6.0V, and requires a ceramic output capacitor of at least 10µF placed close to VOUT and GND. |
| 3 | VIN | power_in | Power input with a recommended range of 3.0V to 36V and an absolute maximum rating of 40V, decoupled with at least 1µF ceramic capacitor placed close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WPMtek Wei Pan Microelectronics |
| Package | SOT23-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | 3 | 36 | V | 5 | ||
| Quiescent Current | IQ | 1.5 | 3 | µA | VIN = 12V, No Load | 5 | |
| Output Current | IOUT | 150 | mA | 5 | |||
| Dropout Voltage | VDROP | 450 | 550 | mV | IOUT = 100mA, VOUT = VOUTNOM, 0.1V | 5 | |
| Load Regulation | ΔVLOAD | 0.03 | 0.05 | %/mA | VIN = VOUTNOM + 1V, 1mA ≤ IOUT ≤ 100mA | 5 | |
| Line Regulation | ΔVLINE | 0.01 | 0.02 | %/V | VOUTNOM + 1V ≤ VIN ≤ 24V, IOUT = 1mA | 5 | |
| Output voltage accuracy (B grade, ±2% default) | -2 | 2 | % | Suffix B: ±2% (default); ±1% only if customized | 1 | ||
| Operating Ambient Temperature | -40 | 85 | °C | 4 | |||
| Input Voltage | 3 | 24 | V | 4 | |||
| Output Voltage | 1.8 | 5 | V | 4 | |||
| Supply Input Voltage | VIN | -0.3 | 40 | V | 4 | ||
| VOUT to VIN | VOUT _ VIN | -35 | -0.3 | V | 4 | ||
| Regulated Output Voltage | VOUT | -0.3 | 6 | V | 4 | ||
| ESD Human Body Model | HBM | -4000 | 4000 | V | Human Body Model (HBM) | 4 | |
| ESD Charged Device Model | CDM | -2000 | 2000 | V | Charged Device Mode (CDM) | 4 | |
| ESD Machine Model | MM | 200 | V | Machine Mode (MM) | 4 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 4 | ||
| Operating Junction Temperature | TJ | 150 | °C | 4 | |||
| Lead Temperature | TLEAD | 260 | °C | Soldering 10s | 4 | ||
| Power Dissipation, SOT23-3 | PD | 450 | mW | TA = +25°C, SOT23-3 | 4 | ||
| Thermal Resistance, Junction to Air, SOT23-3 | θJA | 280 | °C /W | Junction to air, SOT23-3, per JESD 51-7 | 4 |
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 | and output capacitors must be back to the WL9100 ground pin using as wide and as short of a copper trace as is practical.Connections using long trace lengths, narrow trace widths, and/or | 8 |
CAD (KiCad official)
- Symbol:
WL9100S3-50B - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT23-3L (KiCad packages3D, STEP)
- 3D model files:
wl9100s3-50b-etched.step/wl9100s3-50b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wl9100s3-50b.step/wl9100s3-50b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WPMtek Wei Pan Microelectronics datasheet (8 pp, sha256
6437b9fd93db9e0e, 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).