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BL8558-28PRN
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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+51@@ -0,0 +1,51 @@+# BL8558-28PRN++**BL Shanghai Belling** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5++BL8558-28PRN 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 | Regulator input supply. Accepts up to 8V (recommended), 10V absolute max. Bypass with 1uF ceramic capacitor to GND close to the pin. |+| 2 | Vss | power_in | Ground / common return for the regulator. |+| 3 | CE | input | Chip Enable input. Drive high (Vceh >= 1.5V, up to Vin) to enable regulator; drive low (Vcel <= 0.25V) to enter standby (Istandby = 0.1uA typ). Internal pull-down resistor to GND (Rpd = 2-10 MOhm, 5 MOhm typ). |+| 4 | NC | unconnected | No internal connection. Leave floating or tie to GND per PCB preference. |+| 5 | Vout | power_out | Regulated output. Fixed 2.8V on BL8558-28PRN (±2%), 500mA max output current. Requires 3.3uF/4.7uF output capacitor for stability. |++## 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.++- `BL8558-28PRN`+- `BL8558-28PRNPRC`+- `BL8558-28PRNPSA`+- `BL8558-28PRNPSB`+- `BL8558-28PRNPRM`+- `BL8558-28PRNPT`++## CAD (KiCad official)++- Symbol: `BL8558-28PRN`+- 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/bl8558-28prn-datasheet.pdf) (10 pp, sha256 `e45fcf409b9d0231`, 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/bl8558-28prn-datasheet.pdf)
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