component
LM3404HVMAX
Public Unreviewedby Ray
Texas Instruments LED Drivers, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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PCB Footprint
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Datasheet
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README
markdownLM3404HVMAX
Texas Instruments · LED Drivers · SOIC-8
LM3404HVMAX from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | SW | output | Switch pin - drain of the internal high-side N-channel MOSFET. Connect to the output inductor and to the anode of the Schottky recirculating diode. Absolute maximum SW-to-GND is -1.5 V to 76 V on the HV part. |
| 2 | BOOT | passive | MOSFET drive bootstrap pin. Connect a 10-nF ceramic capacitor from BOOT to SW to develop the gate-drive supply for the internal high-side switch. BST undervoltage lockout is ~3 V (BST-SW). |
| 3 | DIM | input | PWM dimming / enable input. Drive with a logic-level PWM signal (VIH ≥ 2.2 V, VIL ≤ 0.8 V) to gate the power MOSFET on/off and reduce average LED current. Includes an ~80 µA internal pull-up so the part runs at full duty if left open. |
| 4 | GND | power_in | Device ground. Connect to system ground and to the ground return of the input, VCC bypass, and current-sense resistor. |
| 5 | CS | input | Current-sense feedback pin. Set the LED current by connecting a sense resistor from CS to GND; the regulator turns the switch on when V(CS) falls below the 200 mV (typ) reference and turns off when V(CS) exceeds the 300 mV overvoltage threshold. |
| 6 | RON | input | On-time control pin. A resistor from RON to VIN programs the regulator's controlled on-time (hysteretic constant-off-time control). Also acts as a shutdown input - pulling RON below ~0.7 V places the device in low-power shutdown. |
| 7 | VCC | power_out | Output of the internal 7 V (typ, 6.4-7.4 V) linear regulator that supplies the gate driver and control circuits. Bypass to GND with a minimum 0.1 µF X5R/X7R ceramic capacitor. Do not load externally. |
| 8 | VIN | power_in | Input supply pin. Nominal operating range is 6 V to 75 V on the LM3404HV (6 V to 42 V on the LM3404). Bypass locally with a low-ESR ceramic input capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | LED Drivers |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
LM3404HVMAXLM3404HVMAXMRLM3404HVMAXMRX
CAD (KiCad official)
- Symbol:
LM3404HVMAX - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (47 pp, sha256
c30b6b258c57c07a, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).