component
LM3405XMK
Public Made by Adomby adom
Texas Instruments LED Drivers, TSOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownLM3405XMK
Texas Instruments · LED Drivers · TSOT-23-6
LM3405XMK from Texas Instruments, in a TSOT-23-6. 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 | BOOST | output | Bootstrap gate drive output with voltage maintained 2.5 V to 5.5 V above SW pin for driving the internal NMOS switch. |
| 2 | GND | power_in | Signal and power ground reference pin. |
| 3 | FB | input | Feedback input pin regulated to 0.205 V nominal for setting LED current through external resistor to ground. |
| 4 | EN/DIM | input | Enable and PWM dimming control input; enables operation at ≥1.8 V, shuts down at ≤0.4 V with 0.3 µA quiescent current. |
| 5 | VIN | power_in | Input supply voltage pin with operating range 3 V to 15 V and absolute maximum rating of 20 V. |
| 6 | SW | output | Switch output pin driven by internal NMOS with 300 mΩ typical on-resistance, connected to inductor and catch diode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSOT-23-6 |
| Category | LED Drivers |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
LM3405XMK - Footprint:
Package_TO_SOT_SMD:TSOT-23-6 - 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
lm3405xmk-etched.step/lm3405xmk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm3405xmk.step/lm3405xmk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (33 pp, sha256
ff230223c72eaf40, retrieved 2026-09-26, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).