# LR1117DS50X

**LRC** · Linear Voltage Regulators (LDO) · SOT-223-4

LR1117DS50X from LRC, in a SOT-223-4. 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 | Gnd | power_in | Ground pin of the fixed-output (5.0V) version. |
| 2 | Vout | power_out | Regulated 5.0V output (±2%) delivering up to 1A, with a recommended 10uF output capacitor. |
| 3 | Vin | power_in | Input supply, absolute maximum 18V and recommended maximum 15V, with a recommended 10uF input capacitor. |
| 4 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOT-223-4 |
| Category | Power Management ICs |
| Pins | 4 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage | Vout | 4.9 | 5 | 5.1 | V | LR1117D-5.0V, 0≤Iout≤1A, Vin=7.0V, Tj=25°C | 3 |
| Load Regulation | ΔVout |  | 9 | 36 | mV | LR1117D-5.0V, Vin=6.5V, 10mA≤Iout≤1A | 3 |
| Dropout Voltage | Vdrop |  | 1.15 | 1.4 | V | Iout=100mA | 4 |
| Dropout Voltage | Vdrop |  | 1.2 | 1.4 | V | Iout=1A | 4 |
| Quiescent Current | Iq |  | 2 | 5 | mA | LR1117D-5.0V, Vin=12V | 4 |
| Temperature coefficient | ΔV/ΔT | -100 |  | 100 | ppm |  | 4 |
| Supply Voltage Rejection | SVR |  | 60 |  | dB | f = 120Hz, VIN - VOUT = 3V + 1VPP Ripple | 4 |
| Current Limit | Ilimit |  | 1 |  | A | Vin-Vout=1.5V, Tj=25°C | 4 |
| Max Input Voltage |  |  |  | 18 | V |  | 2 |
| Max Operating Junction Temperature | Tj |  |  | 150 | °C |  | 2 |
| Storage Temperature | Ts | -40 |  | 150 | °C |  | 2 |
| Lead Temperature |  |  |  | 260 | °C | 10s | 2 |
| Input Voltage Range |  |  |  | 15 | V |  | 2 |
| Operating Junction Temperature | Tj | -40 |  | 125 | °C |  | 2 |
| Environment Temperature |  | -40 |  | 85 | °C |  | 1 |
| Thermal Resistance Junction-to-Case | TJC |  | 20 |  | °C/W | SOT-223 | 4 |
| Thermal Resistance Junction-to-Ambient | TJA |  | 136 |  | °C/W | SOT-223 (No heat sink), no air flow | 4 |

## CAD (KiCad official)

- Symbol: `LR1117DS50X`
- Footprint: `Package_TO_SOT_SMD:SOT-223`
- 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files: `lr1117ds50x-etched.step` / `lr1117ds50x-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lr1117ds50x.step` / `lr1117ds50x.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [LRC datasheet](docs/lr1117ds50x-datasheet.pdf) (11 pp, sha256 `7767140cf4053e81`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/lr1117ds50x-datasheet.pdf)