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LM3404MAX

Public Made by Adom

by adom

Texas Instruments LED Drivers, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM3404MAX

Texas Instruments · LED Drivers · SOIC-8

LM3404MAX from Texas Instruments, in a SOIC-8. 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 output Switch pin that connects to the output inductor and Schottky diode; the absolute maximum SW to GND rating is -1.5 V to 45 V for the LM3404.
2 BOOT output MOSFET drive bootstrap pin that requires a 10-nF ceramic capacitor connected from this pin to SW, with BOOT to SW rated at -0.3 V to 14 V.
3 DIM input Input for PWM dimming that enables and disables the power MOSFET when driven by a logic-level PWM signal, with DIM to GND rated at -0.3 V to 7 V.
4 GND power_in Ground pin that connects to system ground.
5 CS input Current sense feedback pin where a resistor from this pin to ground sets the LED array current, with CS to GND rated at -0.3 V to 7 V.
6 RON input On-time control pin where a resistor from this pin to VIN sets the regulator controlled on-time, with RON to GND rated at -0.3 V to 7 V.
7 VCC power_out Output of the internal 7-V linear regulator that must be bypassed to ground with a minimum 0.1-µF X5R or X7R ceramic capacitor.
8 VIN power_in Input voltage pin with a nominal operating range of 6 V to 42 V for the LM3404 (6 V to 75 V for the LM3404HV).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category LED Drivers
Pins 8

CAD (KiCad official)

  • Symbol: LM3404MAX
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: lm3404max-etched.step / lm3404max-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm3404max.step / lm3404max.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (47 pp, sha256 c30b6b258c57c07a, retrieved 2026-10-08, 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