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BL1117-33CX

Public Made by Adom

by adom

BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs bl1117-33cx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 24d ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
bl1117-33cx-etched.fit.json bl1117-33cx: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bl1117-33cx-etched.glb bl1117-33cx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 24d ago
bl1117-33cx-etched.step bl1117-33cx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 24d ago
bl1117-33cx.glb Publish 0.1.0 · Ray 2mo ago
bl1117-33cx.kicad_mod Publish 0.1.0 · Ray 2mo ago
bl1117-33cx.kicad_sym Publish 0.1.0 · Ray 2mo ago
bl1117-33cx.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray 2mo ago
bl1117-33cx.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.0 · Ray 2mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
page.json bl1117-33cx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 24d ago
README.md bl1117-33cx: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

BL1117-33CX

BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

BL1117-33CX from BL Shanghai Belling, in a SOT-223. 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 return for the regulator. On fixed-voltage versions (including -33) this pin is the device ground reference; on the adjustable version the same pin serves as the ADJ feedback input tied to the external resistor divider.
2 VOUT power_out Regulated 3.3V output (3.234V-3.366V, ±2%) capable of sourcing up to 1A. Requires an output capacitor (10µF typical, compatible with tantalum, electrolytic, or MLCC) for stability.
3 VIN power_in Unregulated input supply, 4.8V to 16V recommended (18V absolute max). Bypass with a 10µF input capacitor close to the pin. Dropout is 1.3V at 1A load.

Key specifications

Parameter Value
Manufacturer BL Shanghai Belling
Package SOT-223
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • BL1117-33CX
  • BL1117-33CX33AX
  • BL1117-33CX33CY
  • BL1117-33CX33AY

CAD (KiCad official)

  • Symbol: BL1117-33CX
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: bl1117-33cx-etched.step / bl1117-33cx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl1117-33cx.step / bl1117-33cx.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
bl1117-33cx.step 64 KB You want the bare part, or you mark your own boards.
bl1117-33cx-etched.step 1.7 MB You want the part with BL1117-33CX already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 428 faces against 75 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: BL Shanghai Belling datasheet (16 pp, sha256 fcde732a0d8dde18, 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