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BL8531CB5TR36
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BL Shanghai Belling DC-DC Converters, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+50@@ -0,0 +1,50 @@+# BL8531CB5TR36++**BL Shanghai Belling** · DC-DC Converters · SOT-23-5++BL8531CB5TR36 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 | CE | input | Chip enable, active high. Threshold VCEH >= 0.8V drives the device on, VCEL <= 0.3V shuts it down to minimize standby supply current. Absolute limits -0.3V to (Vout+0.3V). |+| 2 | OUT | power_out | Output feedback pin, also serves as the internal supply rail for the IC. Connect to the boost output node (after the Schottky diode) with the output filter capacitor (100uF tantalum typ) to GND. Internal feedback regulates this pin to the trimmed VOUT setpoint (3.3V for the -33 suffix, this variant is -36 = 3.6V). |+| 3 | NC | unconnected | No internal connection. Leave floating or tie to ground per board convention. |+| 4 | GND | power_in | Device ground reference. Connect to the system ground plane with low impedance; input capacitor and output capacitor returns should tie here. |+| 5 | Lx | output | Switching node. Connect between the boost inductor (27uH typ) and the anode of the Schottky rectifier diode (e.g. 1N5817/1N5819/1N5822). Internal N-channel MOSFET switch pulls Lx to GND during the on-phase; rated Lx pin current 0.7A, RSWON ~0.4Ω, oscillator ~350kHz PFM. |++## 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.++- `BL8531CB5TR36`+- `BL8531CB5TR36CB3TR`+- `BL8531CB5TR36CB3ATR`+- `BL8531CB5TR36CC3TR`+- `BL8531CB5TR36CHBG`++## CAD (KiCad official)++- Symbol: `BL8531CB5TR36`+- 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/bl8531cb5tr36-datasheet.pdf) (11 pp, sha256 `f28e740a06541198`, 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/bl8531cb5tr36-datasheet.pdf)
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