# LM22670QMRX-5.0

**Texas Instruments** · DC-DC Converters · SOIC-8-EP

LM22670QMRX-5.0 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 | BOOT | input | Bootstrap input that provides the gate voltage for the high-side NFET. |
| 2 | NC | unconnected | Not connected inside the chip, but the pin functions as a thermal conductor to the PCB. |
| 3 | RT/SYNC | input | Switching frequency adjustment and synchronization input; a single external resistor sets the frequency from 200 kHz to 1 MHz, and the pin also controls oscillator mode. |
| 4 | FB | input | Feedback input to the regulator. |
| 5 | EN | input | Enable input used to control regulator start-up and shut-down through the precision enable and UVLO function. |
| 6 | GND | power_in | Ground input to the regulator and system ground pin. |
| 7 | VIN | power_in | Supply input to the regulator. |
| 8 | SW | output | Switching output of the regulator. |
| 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 | Power Management (PMIC) |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `LM22670QMRX-5.0`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`
- 3D model: SOIC-8-EP (KiCad packages3D, STEP)
- 3D model files: `lm22670qmrx-5-0-etched.step` / `lm22670qmrx-5-0-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm22670qmrx-5-0.step` / `lm22670qmrx-5-0.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/lm22670-q1) (38 pp, sha256 `5d2cd199b79fcc67`, retrieved 2026-10-07, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/lm22670qmrx-5-0-datasheet.pdf)