# UA78M05CDCYR

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

UA78M05CDCYR from Texas Instruments, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | INPUT | power_in | Unregulated positive supply input. Recommended input voltage range 7 V to 25 V for the 5 V version (uA78M05); absolute maximum 35 V. A 0.33 uF ceramic bypass capacitor to COMMON is recommended close to the pin. |
| 2 | COMMON | power_in | Common/ground reference for the regulator. On the DCY (SOT-223) package this pin is also thermally/electrically tied to the tab and provides the primary heat-sinking path. |
| 3 | OUTPUT | power_out | Regulated 5 V output, up to 500 mA. A 0.1 uF ceramic bypass capacitor to COMMON is recommended close to the pin for stability and transient response. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223 |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `UA78M05CDCYR`
- `UA78M05CDCYRKC`
- `UA78M05CDCYRKCS`
- `UA78M05CDCYRKVU`
- `UA78M05CDCYRKTP`

## CAD (KiCad official)

- Symbol: `UA78M05CDCYR`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `ua78m05cdcyr-etched.step` / `ua78m05cdcyr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ua78m05cdcyr.step` / `ua78m05cdcyr.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/lit/ds/symlink/ua78m05cdcyr.pdf) (30 pp, sha256 `5b532832c6c871c9`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ua78m05cdcyr-datasheet.pdf)