# LM5163HQDDARQ1

**Texas Instruments** · DC-DC Converters · SO-8

LM5163HQDDARQ1 from Texas Instruments, in a SO-8. 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 | GND | power_in | Ground connection for internal circuits. |
| 2 | VIN | power_in | Regulator supply input pin to high-side power MOSFET and internal bias regulator; connect directly to input supply with short, low impedance paths. |
| 3 | EN/UVLO | input | Precision enable and undervoltage lockout programming pin with converter shutdown below 1.1V, standby mode between 1.1V and 1.5V, and startup sequence initiation above 1.5V. |
| 4 | RON | input | On-time programming pin where external resistor to GND sets the buck switch on-time. |
| 5 | FB | input | Feedback input of voltage regulation comparator. |
| 6 | PGOOD | output | Open-drain power good indicator output pin requiring external pullup resistor between 10kΩ and 100kΩ to source voltage. |
| 7 | BST | power_in | Bootstrap gate-drive supply pin requiring 2.2nF 50V X7R ceramic capacitor between BST and SW to bias internal high-side gate driver. |
| 8 | SW | power_out | Switching node internally connected to high-side NMOS buck switch source and low-side NMOS synchronous rectifier drain, connecting to power inductor switching node. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SO-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `LM5163HQDDARQ1`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files: `lm5163hqddarq1-etched.step` / `lm5163hqddarq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm5163hqddarq1.step` / `lm5163hqddarq1.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/lm5163h-q1) (36 pp, sha256 `af92c1259e2d7425`, retrieved 2026-10-05, 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/lm5163hqddarq1-datasheet.pdf)