component

BL9161G-33BARN

Public Made by Adom

by adom

BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs bl9161g-33barn: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo 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
bl9161g-33barn-etched.fit.json bl9161g-33barn: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bl9161g-33barn-etched.glb bl9161g-33barn: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC b… · Ray 14d ago
bl9161g-33barn-etched.step bl9161g-33barn: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC b… · Ray 14d ago
bl9161g-33barn.glb Publish 0.1.0 · Ray 2mo ago
bl9161g-33barn.kicad_mod Publish 0.1.0 · Ray 2mo ago
bl9161g-33barn.kicad_sym Publish 0.1.0 · Ray 2mo ago
bl9161g-33barn.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
bl9161g-33barn.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 bl9161g-33barn: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC b… · Ray 14d ago
README.md bl9161g-33barn: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

BL9161G-33BARN

BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

BL9161G-33BARN from BL Shanghai Belling, in a SOT-23-5. 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 VIN power_in Power input voltage. Operating range 2.2V to 6V (absolute max -0.3V to +6V). Bypass with ≥1µF ceramic capacitor located within 0.5 inch of the pin.
2 GND power_in Device ground. Should be the common return for VIN and VOUT bypass capacitors; separate VIN/VOUT ground planes are recommended, joined only at this pin.
3 EN input Chip enable input. Active high with an internal pull-down resistor (suffix 'A'). VIH ≥ 1.2V turns the LDO on; VIL ≤ 0.4V places it in shutdown (typ 0.01µA ISTBY). May be tied to VIN for always-on operation.
4 NC unconnected No internal connection. May be left floating or tied to ground for improved PCB layout.
5 VOUT power_out Regulated output voltage (3.3V for the -33 option, ±2% accuracy). Delivers up to 300mA with 205mV dropout at 300mA. Requires a ≥1µF ceramic output capacitor (ESR > 25mΩ) for stability; a fast output discharge circuit pulls VOUT down when EN is de-asserted.

Key specifications

Parameter Value
Manufacturer BL Shanghai Belling
Package SOT-23-5
Category PMIC
Pins 5

Ordering variants

  • BL9161G-33BARN
  • BL9161G-33BARNURN
  • BL9161G-33BARNRT
  • BL9161G-33BARNDRN

CAD (KiCad official)

  • Symbol: BL9161G-33BARN
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: bl9161g-33barn-etched.step / bl9161g-33barn-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl9161g-33barn.step / bl9161g-33barn.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
bl9161g-33barn.step 85 KB You want the bare part, or you mark your own boards.
bl9161g-33barn-etched.step 2.6 MB You want the part with BL9161G-33BARN already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 631 faces against 102 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 (12 pp, sha256 80128448c1757d7f, 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