# IL1117C-1.5

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

IL1117C-1.5 from IKSEMICON, 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 on the fixed-voltage IL1117C-1.5 (the shared ADJ/GND pin is the adjust pin only on the adjustable version); the load low side can connect here. |
| 2 | OUTPUT | power_out | Regulated 1.5V output (1.470 to 1.530V over Io = 10mA to 1.0A) that needs at least a 10uF tantalum capacitor to GND for stability, and it is connected to the heat-sink tab. |
| 3 | INPUT | power_in | Unregulated input voltage, maximum 15V absolute maximum, with Vin = 3.0 to 12.0V specified for the 1.5V output and a 10uF tantalum input capacitor recommended. |
| 4 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | IKSEMICON |
| 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 | 1.47 | 1.5 | 1.53 | V | Io = 10mA to 1.0A, Vin = 3.0 to 12.0V | 2 |
| Line regulation |  |  | 2 | 7 | mV | Io =10mA, Vin = 3.0 to 12.0V | 2 |
| Load regulation |  |  | 3 | 10 | mV | Io = 10mA to 1.0A, Vin = 3.5V | 2 |
| Dropout voltage |  |  | 1.2 | 1.3 | V | Io =1A (Tj = 25°C) | 2 |
| Dropout voltage |  |  | 1.2 | 1.55 | V | Io =1A (Tj = -40°C to +125°C) | 2 |
| Quiescent current | IQ |  | 5.2 | 10 | mA | Vin - Vo = 1.5V | 2 |
| Input voltage (maximum) | VIN |  |  | 15 | V |  | 1 |
| Operating junction temperature range | TJ | -40 |  | 125 | °C |  | 1 |
| Thermal resistance junction-to-ambient (SOT-223) | ΘJA |  |  | 150 | °C/W |  | 1 |
| Thermal resistance junction-to-case (SOT-223) | ΘJC |  |  | 35 | °C/W |  | 1 |
| Ripple rejection ratio |  | 60 | 72 |  | dB | 120Hz input ripple, Vin -Vo = 5V, Io = 1.0A, Tj = -40°C to +125°C | 2 |
| Current limit |  |  | 1000 |  | mA | Vin - Vo = 5V (Tj = 25°C) | 2 |
| Quiescent current vs load current (IL1117C) |  |  | 0.5 | 5 | uA | Io = 10mA to 1A, Vin - Vo = 1.4 to 10V | 2 |
| Temperature drift |  |  | 0.5 |  | % | Tj = -40°C to +125°C | 2 |
| RMS output noise |  |  | 0.003 |  | %Vo | Bandwidth of 10Hz to 10kHz at 25°C | 2 |

## CAD (KiCad official)

- Symbol: `IL1117C-1.5`
- Footprint: `Package_TO_SOT_SMD:SOT-223`
- 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files: `il1117c-1-5-etched.step` / `il1117c-1-5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `il1117c-1-5.step` / `il1117c-1-5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [IKSEMICON datasheet](docs/il1117c-1-5-datasheet.pdf) (10 pp, sha256 `8aeaef3e5071b028`, retrieved 2026-11-08, 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/il1117c-1-5-datasheet.pdf)