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BL9161G-25BARN
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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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README.mdadded+49@@ -0,0 +1,49 @@+# 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](docs/bl9161g-25barn-datasheet.pdf) (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](docs/bl9161g-25barn-datasheet.pdf)
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