component
REG1117A-1.8
Public Made by Adomby adom
Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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REG1117A-1.8
Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
REG1117A-1.8 from Texas Instruments, 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 reference pin for the fixed-voltage REG1117A-1.8 (labelled Adj. on the adjustable model). |
| 2 | VOUT | power_out | Regulated output voltage of 1.8V; the REG1117A supplies up to 1A max with 1.3V max dropout at IO = 1A. |
| 3 | VIN | power_in | Unregulated input supply; absolute maximum input voltage is +15V and the regulator needs about 1V-1.3V input-output differential for regulation at 1A. |
| 4 | VOUT (tab) | power_out | Mounting tab, electrically connected to VOUT and used for heat sinking through the board copper; the datasheet gives JA of about 49°C/W with solid backside copper. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
CAD (KiCad official)
- Symbol:
REG1117A-1.8 - Footprint:
Package_TO_SOT_SMD:SOT-223 - 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files:
reg1117a-1-8-etched.step/reg1117a-1-8-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);reg1117a-1-8.step/reg1117a-1-8.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (23 pp, sha256
9612deef2bd34399, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).
# REG1117A-1.8
**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
REG1117A-1.8 from Texas Instruments, 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 reference pin for the fixed-voltage REG1117A-1.8 (labelled Adj. on the adjustable model). |
| 2 | VOUT | power_out | Regulated output voltage of 1.8V; the REG1117A supplies up to 1A max with 1.3V max dropout at IO = 1A. |
| 3 | VIN | power_in | Unregulated input supply; absolute maximum input voltage is +15V and the regulator needs about 1V-1.3V input-output differential for regulation at 1A. |
| 4 | VOUT (tab) | power_out | Mounting tab, electrically connected to VOUT and used for heat sinking through the board copper; the datasheet gives JA of about 49°C/W with solid backside copper. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
## CAD (KiCad official)
- Symbol: `REG1117A-1.8`
- Footprint: `Package_TO_SOT_SMD:SOT-223`
- 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files: `reg1117a-1-8-etched.step` / `reg1117a-1-8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `reg1117a-1-8.step` / `reg1117a-1-8.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/reg1117a) (23 pp, sha256 `9612deef2bd34399`, retrieved 2026-10-08, 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/reg1117a-1-8-datasheet.pdf)