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BL9161G-33BARN
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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+47@@ -0,0 +1,47 @@+# 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-33BARNRN`+- `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)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [BL Shanghai Belling datasheet](docs/bl9161g-33barn-datasheet.pdf) (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](docs/bl9161g-33barn-datasheet.pdf)
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