component

LR1117CS33X

Public Unreviewed

by Ray

LRC Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiclr1117cs33x
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

LR1117CS33X

LRC · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4

LR1117CS33X from LRC, 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 system ground; also provides thermal return through the package.
2 VOUT power_out Regulated 3.3V output (LR1117C-3.3V variant: 3.234V to 3.366V, +/-2%). Supports up to 1A load current with 1.3V typical dropout at 1A. Requires a 10uF output capacitor (tantalum recommended) for stability.
3 VIN power_in Unregulated input supply. Operating range up to 12V (absolute max 15V). For 3.3V output, Vin typically 5.3V; must maintain Vin >= Vout + Vdropout. A 10uF input bypass capacitor is recommended.
4 VOUT power_out SOT-223 tab (large center pad) is electrically connected to VOUT and serves as the primary heat-sinking surface. Solder to a copper pour to reduce theta_JA (bare package is ~136 C/W).

Key specifications

Parameter Value
Manufacturer LRC
Package SOT-223-4
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • LR1117CS33X
  • LR1117CD33X

CAD (KiCad official)

  • Symbol: LR1117CS33X
  • 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: LRC datasheet (10 pp, sha256 22ac41e4db57023b, retrieved 2026-08-17, tier: lcsc)
  • 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).

Datasheet PDF