# LM3466MRX

**Texas Instruments** · LED Drivers · SOIC-8-EP

LM3466MRX from Texas Instruments, in a SOIC-8-EP. 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 | ILED | input | Current regulator input connected to the drain of the integrated power MOSFET and the LED string cathode; the device is rated for 70 V maximum per LED string (absolute maximum 75 V to GND), and a capacitor to ground may be added to reduce noise on long LED cables. |
| 2 | COMM | output | Open-drain status output that indicates startup, LED string active/inactive and thermal shutdown; it is pulled low at startup and under thermal protection, is pulled up to 6.0 V through a 10-kΩ resistor, and has an absolute maximum rating of 7 V to GND. |
| 3 | VIN | power_in | Input voltage supply rated 6 V to 70 V (absolute maximum 75 V to GND) that should be decoupled with a 10-nF capacitor to ground. |
| 4 | VEQ | output | Control voltage output that connects to the VEQ pin of other LM3466 devices through a 51-Ω resistor in series with a 1-µF capacitor to ground (absolute maximum 5 V to GND). |
| 5 | GND | power_in | Ground connection that connects to the ground plane and is also the reference for the device's absolute maximum ratings. |
| 6 | SEN | input | Current sense input that senses the voltage of the external sensing resistor and regulates it to about 200 mV (absolute maximum 5 V to GND). |
| 7 | SRC | output | Source of the integrated power MOSFET that connects to the external current sensing resistor RSEN to ground (absolute maximum 5 V to GND). |
| 8 | SRC | output | Source of the integrated power MOSFET that connects to the external current sensing resistor RSEN to ground; the datasheet lists this pin together with pin 7 as the single SRC function (absolute maximum 5 V to GND). |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8-EP |
| Category | LED Drivers |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `LM3466MRX`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`
- 3D model: SOIC-8-EP (KiCad packages3D, STEP)
- 3D model files: `lm3466mrx-etched.step` / `lm3466mrx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm3466mrx.step` / `lm3466mrx.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/lm3466) (24 pp, sha256 `cbb2154e987b744e`, retrieved 2026-10-12, 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/lm3466mrx-datasheet.pdf)