# LMR14050SDDA

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

LMR14050SDDA from Texas Instruments, in a SOP-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 | output | Bootstrap capacitor connection for high-side MOSFET gate driver; connect 0.1µF capacitor between BOOT and SW pins. |
| 2 | VIN | power_in | Power supply input accepts 4V to 40V with high-frequency bypass capacitor CIN to ground. |
| 3 | EN | input | Enable input with internal pull-up current source; pull below 1.2V to disable device or leave floating/connect to VIN to enable. |
| 4 | RT/SYNC | input | Timing resistor input for programmable switching frequency (200kHz to 2.5MHz) or external clock synchronization input (250kHz to 2.3MHz). |
| 5 | FB | input | Feedback input for output voltage setting via external resistor divider; do not short to ground during operation. |
| 6 | SS | output | Soft-start control pin for programmable output slew rate; connect external capacitor to ground to set soft-start time. |
| 7 | GND | power_in | System ground connection point. |
| 8 | SW | output | Switching output node internally connected to low-side MOSFET; externally connect to power inductor. |
| 9 | Thermal Pad | power_in | Exposed thermal pad for primary heat dissipation path; must be connected to ground plane on PCB. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOP-8-EP |
| Category | Power Management ICs |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `LMR14050SDDA`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`
- 3D model: SOP-8-EP (KiCad packages3D, STEP)
- 3D model files: `lmr14050sdda-etched.step` / `lmr14050sdda-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lmr14050sdda.step` / `lmr14050sdda.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/lmr14050) (34 pp, sha256 `9e9750380623d4ad`, retrieved 2026-10-03, 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-4-5-20251001` (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/lmr14050sdda-datasheet.pdf)