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BL1117-50CY

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BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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docs bl1117-50cy: 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 bl1117-50cy: viewers · Ray 2mo ago
bl1117-50cy-etched.fit.json bl1117-50cy: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bl1117-50cy-etched.glb bl1117-50cy: 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
bl1117-50cy-etched.step bl1117-50cy: 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
bl1117-50cy.glb Publish 0.1.0 · Ray 2mo ago
bl1117-50cy.kicad_mod Publish 0.1.0 · Ray 2mo ago
bl1117-50cy.kicad_sym Publish 0.1.0 · Ray 2mo ago
bl1117-50cy.lbr Publish 0.1.0 · Ray 2mo ago
bl1117-50cy.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.1.0 · Ray 2mo ago
page.json bl1117-50cy: 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 bl1117-50cy: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

BL1117-50CY

BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)

BL1117-50CY from BL Shanghai Belling, in a TO-252-2(DPAK). 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. Also serves as the thermal return via the DPAK tab (electrically connected to GND / tab).
2 Vout power_out Regulated 5.0V output, up to 1A load current. Requires a 10uF tantalum or MLCC output capacitor for stability (ESR 3mΩ~22Ω).
3 Vin power_in Unregulated input supply. Must be at least Vout+1.3V (dropout at 1A) up to 12V max operating (15V abs max). A 10uF input bypass capacitor is recommended.
TAB GND power_in TO-252 (DPAK) exposed heat-slug tab, internally connected to the GND pin. Solder to a ground copper pour for heat dissipation; θJC = 10°C/W for TO-252.

Key specifications

Parameter Value
Manufacturer BL Shanghai Belling
Package TO-252-2(DPAK)
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • BL1117-50CYY
  • BL1117-50CY
  • BL1117-50CY50AY
  • BL1117-50CYX
  • BL1117-50CY50CX
  • BL1117-50CY50AX

CAD (KiCad official)

  • Symbol: BL1117-50CY
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
  • 3D model files: bl1117-50cy-etched.step / bl1117-50cy-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl1117-50cy.step / bl1117-50cy.glb are the bare package body.

Provenance

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

  • Datasheet: BL Shanghai Belling datasheet (15 pp, sha256 a7fe7f5c0846d4ca, 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