# TPS7A4518DCQR

**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-6

TPS7A4518DCQR from Texas Instruments, in a SOT-223-6. 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 | SHDN | input | Shutdown input accepting 5V or 3V logic levels with typical 3 μA input current; pull low to disable output or connect to VIN if unused. |
| 2 | IN | power_in | Power supply input requiring 1-10 μF ceramic bypass capacitor if more than six inches from main filter; protected against reverse voltage on both IN and OUT pins. |
| 3 | GND | power_in | Ground reference. |
| 4 | OUT | power_out | Regulated 1.8V output power supply requiring minimum 10 μF ceramic capacitor to prevent oscillations. |
| 5 | SENSE | input | Feedback input to error amplifier with 600 μA bias current at rated output voltage; connect to output for optimal regulation or to load to eliminate PCB trace voltage drops. |
| 6 | GND | power_in | Ground reference for DCQ package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `TPS7A4518DCQR`
- Footprint: `Package_TO_SOT_SMD:SOT-223-6`
- 3D model: SOT-223-6 (KiCad packages3D, STEP)
- 3D model files: `tps7a4518dcqr-etched.step` / `tps7a4518dcqr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps7a4518dcqr.step` / `tps7a4518dcqr.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/tps7a45) (38 pp, sha256 `c8c2fe4b7b5bd34b`, retrieved 2026-10-03, tier: lcsc)
- **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/tps7a4518dcqr-datasheet.pdf)