L4940V5

@@ -0,0 +1,45 @@+# L4940V5++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220++L4940V5 from STMicroelectronics, in a TO-220. 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 input supply. Absolute maximum forward VI = 30 V; recommended operating VI up to 17 V. Reverse input voltage rated to -15 V with the recommended output resistor. Bypass to GND with CI = 0.1 uF close to the pin. |+| 2 | GROUND | power_in | Device ground and thermal reference. Electrically connected to the TO-220 mounting tab (heatsink). Carries quiescent current (typ. 5 mA at low load, ~30 mA at 1.5 A load) plus the load return current. |+| 3 | OUTPUT | power_out | Regulated +5 V output (4.8 V to 5.2 V over 5 mA to 1.5 A load, VI = 6.5 V to 15 V). Internally current-limited (Isc typ. 2 A) and thermally protected. Requires CO >= 22 uF for stability and transient response. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | TO-220 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `L4940V5`+- `L4940V5L4940D2T5-TR`+- `L4940V5L4940V85`+- `L4940V5L4940D2T12-TR`++## CAD (KiCad official)++- Symbol: `L4940V5`+- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`+- 3D model: TO-220 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/l4940v5.pdf) (25 pp, sha256 `82b4fdbd2bcc1df9`, 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/l4940v5-datasheet.pdf)

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