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BL9161G-25BARN

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by Ray

BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

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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)

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