component
ldl1117s18r
Public Unreviewedby Ray
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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markdownLDL1117S18R
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
LDL1117S18R from STMicroelectronics, in a SOT-223-4. 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 | GND | power_in | Ground reference for the regulator. Connect to a clean analog ground plane close to the input/output capacitor return paths. |
| 2 | VOUT | power_out | Regulated 1.8 V output (LDL1117S18R variant). Guaranteed 1.2 A output current with typical 350 mV dropout at 1.2 A. Requires a minimum 4.7 µF ceramic output capacitor (X5R/X7R) placed close to this pin for stability. The exposed tab is internally connected to VOUT. |
| 3 | VIN | power_in | Input supply pin. Operating range 2.6 V to 18 V (absolute max 20 V, -0.3 to 20 V AMR). Requires a minimum 1 µF ceramic input capacitor placed as close as possible to this pin. UVLO turn-on threshold is typically 2.3 V with 200 mV hysteresis. |
| 4 | TAB | power_out | Exposed metal tab on SOT-223 package, internally connected to VOUT. Serves as the primary thermal dissipation path - solder to a copper pour tied to the VOUT net to reduce θJ-A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-223-4 |
| Category | PMIC |
| Pins | 4 |
Ordering variants
LDL1117S18R
CAD (KiCad official)
- Symbol:
LDL1117S18R - Footprint:
Package_TO_SOT_SMD:SOT-223 - 3D model: SOT-223-4 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (None pp, sha256
ffbb9e03f7f6d0c4, retrieved 2026-08-17, tier: manufacturer) - 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).