# TPS78533QKVURQ1

**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-4

TPS78533QKVURQ1 from Texas Instruments, in a TO-252-4. 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 | EN | input | Enable pin; drive to logic high to enable device, logic low to disable device; do not float this pin, if not used connect EN to IN. |
| 2 | IN | power_in | Input pin for supply voltage 1.7V to 6.0V; place nominal recommended value or larger ceramic capacitor from IN to GND as close to device input as possible. |
| 3 | GND | power_in | Ground pin, must be connected to ground on board; thermal pad is electrically connected to GND and should be connected to large-area GND plane for improved thermal performance. |
| 4 | OUT | power_out | Output pin; 0.47µF or greater effective capacitance required from OUT to ground for stability; use 1µF or larger ceramic capacitor for best transient response; place as close to output as possible. |
| 5 | NC | unconnected | No connect pin, not internally connected; connect to ground for best thermal performance or leave floating. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TO-252-4 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `TPS78533QKVURQ1`
- Footprint: `Package_TO_SOT_SMD:TO-252-4`
- 3D model: TO-252-4 (KiCad packages3D, STEP)
- 3D model files: `tps78533qkvurq1-etched.step` / `tps78533qkvurq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps78533qkvurq1.step` / `tps78533qkvurq1.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/tps785-q1) (46 pp, sha256 `8d1b76473f2a1cce`, 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/tps78533qkvurq1-datasheet.pdf)