LM2931AD50R

@@ -0,0 +1,55 @@+# LM2931AD50R++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOIC-8++LM2931AD50R from STMicroelectronics, in a SOIC-8. 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 | VOUT | power_out | Regulated 5.0 V output. Typical 5.0 V (min 4.75 V, max 5.25 V) at IO = 100 mA over the full VI = 6 to 26 V and TJ = -40 to 125 °C range. Requires a ≥100 µF output capacitor for stability. |+| 2 | GND | power_in | Device ground / reference return. |+| 3 | GND | power_in | Device ground / reference return (tied internally to the other GND pins; multiple GND pins aid heat sinking on SO-8). |+| 4 | NC | unconnected | Not connected on the fixed-output version (LM2931AD50R). This pin serves as the ADJ feedback input only on the adjustable (LM2931D-R) variant; leave floating on this part. |+| 5 | INHIBIT | input | Active-high shutdown / inhibit logic input. Regulator is enabled when VINH < 1.2 V (VIL) and disabled when VINH > 3.25 V (VIH). Inhibit input current IINH ≈ 22 µA typ (50 µA max) at VINH = 2.5 V. Absolute maximum inhibit input voltage is 40 V. |+| 6 | GND | power_in | Device ground / reference return (tied internally to the other GND pins). |+| 7 | GND | power_in | Device ground / reference return (tied internally to the other GND pins). |+| 8 | VIN | power_in | Unregulated supply input. Recommended operating range 6 V to 26 V (max operating 26 V min); tolerates transient input up to 60 V (T < 100 ms) and reverse polarity down to -15 V DC / -50 V transient. Decouple with a 0.1 µF input capacitor. Absolute maximum DC input voltage 40 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOIC-8 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `LM2931AD50R`+- `LM2931AD33R`+- `LM2931D-R`+- `LM2931ADT50R`+- `LM2931ADT50RY`+- `LM2931ADT33RY`+- `LM2931AZ50R`++## CAD (KiCad official)++- Symbol: `LM2931AD50R`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588879859115941888) (24 pp, sha256 `07bd8d19d77c6060`, retrieved 2026-08-17, tier: lcsc)+- **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/lm2931ad50r-datasheet.pdf)

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