component
bl8503-40prm
Public Unreviewedby Ray
BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3L. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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markdownBL8503-40PRM
BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3L
BL8503-40PRM from BL Shanghai Belling, in a SOT-23-3L. 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 | Vss | power_in | Ground reference (0V). Common return for input and output. Connect to system ground with a low-impedance path. |
| 2 | Vout | power_out | Regulated output voltage (4.0V nominal, ±2%) for the -40 option. Delivers up to 250mA. Requires a 1µF output capacitor (tantalum recommended) for loop stability. |
| 3 | Vin | power_in | Supply voltage input, 1.5V to 10V absolute max (recommended max 8V). Requires a 1µF input capacitor (tantalum recommended). For Vout=4.0V, Vin must exceed Vout + dropout (~4.4V @ 250mA). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BL Shanghai Belling |
| Package | SOT-23-3L |
| Category | PMIC |
| Pins | 3 |
Ordering variants
BL8503-40PRMBL8503-40PRMPSMBL8503-40PRMPSABL8503-40PRMPSBBL8503-40PRMPT
CAD (KiCad official)
- Symbol:
BL8503-40PRM - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3L (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BL Shanghai Belling datasheet (None pp, sha256
8f6684221c2cf4c4, 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).