# LM3402HVMMX

**Texas Instruments** · LED Drivers · VSSOP-8-0.65mm

LM3402HVMMX from Texas Instruments, in a VSSOP-8-0.65mm. 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; connect this pin to the output inductor and Schottky diode. |
| 2 | BOOT | output | MOSFET drive bootstrap pin; connect a 10-nF ceramic capacitor from this pin to SW. |
| 3 | DIM | input | Input for PWM dimming; a logic-level PWM signal on this pin enables and disables the MOSFET and reduces the average LED light output. |
| 4 | GND | power_in | Ground pin; connect to system ground. |
| 5 | CS | input | Current sense feedback pin; set the LED array current by connecting a resistor from this pin to ground. |
| 6 | RON | input | ON-time control pin; a resistor from this pin to VIN sets the regulator controlled ON-time. |
| 7 | VCC | power_out | Output of the internal 7-V linear regulator; bypass to ground with a minimum 0.1-µF ceramic capacitor with X5R or X7R dielectric. |
| 8 | VIN | power_in | Input voltage pin; nominal operating input range is 6 V to 42 V (LM3402) or 6 V to 75 V (LM3402HV). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8-0.65mm |
| Category | LED Drivers |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `LM3402HVMMX`
- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`
- 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
- 3D model files: `lm3402hvmmx-etched.step` / `lm3402hvmmx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm3402hvmmx.step` / `lm3402hvmmx.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm3402hv) (43 pp, sha256 `8c6e2cc4aaa8c98a`, 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](docs/lm3402hvmmx-datasheet.pdf)