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BL9161G-25BARN

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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docs bl9161g-25barn: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers bl9161g-25barn: viewers · Ray
bl9161g-25barn-etched.fit.json bl9161g-25barn: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
bl9161g-25barn-etched.glb bl9161g-25barn: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC b… · Ray
bl9161g-25barn-etched.step bl9161g-25barn: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC b… · Ray
bl9161g-25barn-hero.glb bl9161g-25barn: hero from the plain model · Ray
bl9161g-25barn-hero.overlay.json bl9161g-25barn: hero from the plain model · Ray
bl9161g-25barn.glb Publish 0.1.0 · Ray
bl9161g-25barn.kicad_mod Publish 0.1.0 · Ray
bl9161g-25barn.kicad_sym Publish 0.1.0 · Ray
bl9161g-25barn.lbr Publish 0.1.0 · Ray
bl9161g-25barn.step Publish 0.1.0 · Ray
package.json Publish 0.1.2 · Ray
page.json Publish 0.1.2 · Ray
README.md bl9161g-25barn: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

BL9161G-25BARN

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

BL9161G-25BARN 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 to GND.
2 GND power_in Device ground reference.
3 EN input Chip enable pin (active high). VIH ≥ 1.2V enables the regulator; VIL ≤ 0.4V puts device in shutdown (ISTBY = 0.01µA typ). Has internal pull-down resistor (suffix 'A' variant), so may be left floating for shutdown. Absolute max -0.3V to VIN.
4 NC unconnected No connection. Leave floating or tie to GND for best mechanical/thermal robustness.
5 VOUT power_out Regulated output voltage, factory-trimmed to 2.5V ±2%. Delivers up to 300mA with 205mV typical dropout at 300mA. Requires ≥1µF ceramic output capacitor for stability (≥2.2µF recommended for lower-voltage variants).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • BL9161G-25BARN
  • BL9161G-25BARNURN
  • BL9161G-25BARNDRN
  • BL9161G-25BARNRT

CAD (KiCad official)

  • Symbol: BL9161G-25BARN
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: bl9161g-25barn-etched.step / bl9161g-25barn-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl9161g-25barn.step / bl9161g-25barn.glb are the bare package body.

Provenance

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

  • Datasheet: BL Shanghai Belling datasheet (12 pp, sha256 6191c2f09b50b9cf, 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