component
ld1117str
Public Unreviewedby Ray
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownLD1117STR
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-3
LD1117STR from STMicroelectronics, in a SOT-223-3. 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 | ADJ | input | Adjust pin. Sets output voltage via external resistor divider between OUT and ADJ. Reference voltage between OUT and ADJ is 1.25 V typ. (1.225-1.275 V). Adjustment pin current (IADJ) is 60 µA typ., 120 µA max. On fixed-voltage variants this pin is GND instead. |
| 2 | VOUT | power_out | Regulated output voltage. Adjustable from 1.25 V to 15 V via R1/R2 divider. Delivers up to 800 mA (min) / 950 mA (typ) with VIN-VOUT = 5 V at TJ = 25 °C. Requires 10 µF minimum output capacitor for stability. Tab (pin 4) is internally connected to this pin. |
| 3 | VIN | power_in | Unregulated DC input. Operating input voltage up to 15 V (18 V absolute max for IOUT < 20 mA). Dropout voltage 1 V typ. (1.1 V max at 100 mA, 1.15 V at 500 mA, 1.2 V at 800 mA). 100 nF input decoupling capacitor recommended. |
| 4 | TAB | power_out | Metal heat-sink tab, internally connected to VOUT. Used for thermal dissipation to PCB copper pour. RthJC = 15 °C/W, RthJA = 110 °C/W for SOT-223. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-223-3 |
| Category | PMIC |
| Pins | 4 |
Ordering variants
LD1117STRLD1117STRSC-RLD1117STRD33TRLD1117STRD33CTRLD1117STRDTTRLD1117STRDTC-RLD1117STRVLD1117STRV-DG
CAD (KiCad official)
- Symbol:
LD1117STR - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223-3 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (None pp, sha256
1b80923ec6ca9161, 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).