# LR1117DD12X

**LRC** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

LR1117DD12X from LRC, in a TO-252. 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 reference pin for the fixed-voltage regulator; the datasheet gives no separate electrical limit for this pin. |
| 2 | Vout | power_out | Regulated 1.2V output for this fixed version, specified for output currents up to 1A with output voltage accuracy within ±2%. |
| 3 | Vin | power_in | Input supply pin, with recommended operating input voltage up to 15V (absolute maximum 18V), and a 10uF input capacitor recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | TO-252 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## 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 (1.2V fixed version) | VOUT | 1.164 | 1.2 | 1.224 | V | 0≤Iout≤1A, Vin=3.2V | 3 |
| Line Regulation (1.2V fixed version) | ΔVout |  | 0.03 | 0.2 | %/V | Iout=10mA, 2.7V≤Vin≤10V | 3 |
| Load Regulation (1.2V fixed version) | ΔVout |  | 2 | 8 | mV | Vin=2.7V, 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 (1.2V fixed version) | Iq |  | 4 | 6 | mA | Vin =10V | 4 |
| Temperature Coefficient | ΔV/ΔT | -100 |  | 100 | ppm |  | 4 |
| Input Voltage Range |  |  |  | 15 | V |  | 2 |
| Ambient Operating Temperature | Ta | -40 |  | 85 | °C |  | 2 |
| Operating Junction Temperature | Tj | -40 |  | 125 | °C |  | 1 |
| Max Input Voltage |  |  |  | 18 | V |  | 2 |
| Max Operating Junction Temperature | Tj |  |  | 125 | °C |  | 2 |
| Storage Temperature | Ts | -40 |  | 150 | °C |  | 2 |
| Lead Temperature & Time |  |  |  | 260 | °C | 10s | 2 |
| Thermal Resistance Junction to Case (TO252) |  |  | 10 |  | °C/W | Junction to case, TO252 package | 2 |
| Thermal Resistance Junction to Ambient (TO252) |  |  | 136 |  | °C/W | Junction to ambient, TO252; device mounted on 42.25mm² (Pin2) FR-4 board with 2oz copper | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | Copper |  | Note: 1.Rθja Test conditions:The device mounted on 42.25mm2(Pin2) FR-4 board with 2oz. Copper | 2 |

## CAD (KiCad official)

- Symbol: `LR1117DD12X`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `lr1117dd12x-etched.step` / `lr1117dd12x-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lr1117dd12x.step` / `lr1117dd12x.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603136453258067968) (13 pp, sha256 `826e52c5803f51a0`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/lr1117dd12x-datasheet.pdf)