component
SL4139
Public Made by Adomby adom
Slkor(SLKORMICRO Elec.) LED Drivers, 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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README
markdownSL4139
Slkor(SLKORMICRO Elec.) · LED Drivers · SOT-23-5
SL4139 from Slkor(SLKORMICRO Elec.), 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 | SW | passive | Drain of the internal power switch; connect inductor and Schottky diode anode here, with an internal over-voltage detection that enters low-power safe mode at 37V (abs max 40V). |
| 2 | GND | power_in | Ground reference pin, connect directly to the PCB ground plane. |
| 3 | FB | input | Feedback pin clamped at 0.3V, connect to the cathode of the lowest LED and to resistor R1 to GND to set ILED = 0.3V/R1 (abs max 7V). |
| 4 | SHDN | input | Active-high shutdown logic input; below 0.4V the device is shut down, above 1.5V it is enabled (abs max 40V). |
| 5 | VIN | power_in | Supply input for the internal logic with a 3.3V to 32V input range, bypass with a 4.7uF ceramic capacitor to GND; device stops below 3.3V UVLO. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Slkor(SLKORMICRO Elec.) |
| Package | SOT-23-5 |
| Category | LED Drivers |
| 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 |
|---|---|---|---|---|---|---|---|
| VIN voltage | VIN | -0.3 | 42 | V | 6 | ||
| FB voltage | VFB | -0.3 | 7 | V | 6 | ||
| SHDN voltage | VSHDN | -0.3 | 40 | V | 6 | ||
| SW voltage | VSW | -0.3 | 40 | V | 6 | ||
| Storage temperature | Tstg | -40 | 150 | ℃ | 6 | ||
| Junction temperature | Tj | -40 | 150 | ℃ | 6 | ||
| Soldering temperature | Tsoldering | 300 | ℃ | 6 | |||
| ESD HBM | VESD-HBM | -2000 | 2000 | V | Human body model, JESD22-A114 | 6 | |
| ESD CDM | VESD-CDM | -1000 | 1000 | V | Charged device model, JESD22-C101E | 6 | |
| Thermal resistance junction-ambient | Rthj-a | 220 | K/W | SOT23-5 soldered on PCB | 6 | ||
| VIN pin voltage | VIN | 3.6 | 30 | V | 6 | ||
| SW pin voltage | VSW | 0 | 32 | V | 6 | ||
| Ambient temperature range | -40 | 150 | ℃ | 6 | |||
| Operating current | IQ | 0.8 | 1.5 | mA | VIN=3.6V, Ta=25℃, VFB=0.2V | 7 | |
| Operating current | IQ | 0.1 | 0.6 | mA | VIN=3.6V, Ta=25℃, VFB=0.4V | 7 | |
| Shutdown current | ISD | 6 | 10 | uA | VSHDN=0V | 7 | |
| FB pin voltage | VFB | 285 | 300 | 315 | mV | IOUT = 180mA | 7 |
| FB input current | IFB | 1 | uA | 7 | |||
| Enable turn-on voltage | VENH | 1 | 1.5 | V | 7 | ||
| Enable turn-off voltage | VENL | 0.4 | 0.5 | V | 7 | ||
| Switching frequency | FSW | 0.8 | 1 | 1.3 | MHz | 7 | |
| Switch on-resistance | RSW | 1 | 2 | Ω | ISW = 100 mA | 7 | |
| Switch leakage current | LLEAK | 1 | uA | EN=0V，VSW=5V | 7 | ||
| Switch current limit | ILIM | 600 | A | VIN=3.6V | 7 | ||
| Switch current limit | ILIM | 750 | A | VIN=5V | 7 | ||
| Thermal shutdown | TSD | 150 | ℃ | 7 | |||
| Thermal hysteresis | THYST | 20 | ℃ | 7 | |||
| UVLO threshold | VUVLO | 3.3 | V | 7 | |||
| Overvoltage detection threshold | VOV-DET | 37 | V | 7 | |||
| Output clamp voltage | VOCL | 37 | V | LED 开路，FB<0.2 | 7 | ||
| Duty cycle | DC | 16 | 92 | % | 7 |
CAD (KiCad official)
- Symbol:
SL4139 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
sl4139-etched.step/sl4139-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sl4139.step/sl4139.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Slkor(SLKORMICRO Elec.) datasheet (16 pp, sha256
a517aa0a95a48db0, retrieved 2026-10-22, 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, primaryclaude-sonnet-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).