component

BL8550-33CB

Public Made by Adom

by adom

BL(Shanghai Belling) Linear Voltage Regulators (LDO), SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BL8550-33CB

BL(Shanghai Belling) · Linear Voltage Regulators (LDO) · SOT-89-3

BL8550-33CB from BL(Shanghai Belling), in a SOT-89-3. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground reference for the regulator (BL8550-xxCB pin configuration).
2 Vin power_in Regulator input supply, maximum input voltage 18V.
3 Vout power_out Regulated 3.3V output (3.234V to 3.366V at Tj=25°C), up to 400mA load current.

Key specifications

Parameter Value
Manufacturer BL(Shanghai Belling)
Package SOT-89-3
Category Power Management ICs
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage (BL8550-3.3V) Vout 3.234 3.3 3.366 V Tj=25℃ 3
Line Regulation ΔVout 0.2 0.4 % Vin=5V～15V 3
Load Regulation ΔVout 0.2 0.4 % IL＝0～400mA 3
Dropout Voltage 1.22 1.3 V ∆Vout, ∆Vref,=1%，Iout=400mA 3
Current Limit Max Load Current 600 mA Vin-Vout=2V, Tj=25℃ 3
Quiescent Current Iq 4 8 mA 3
Temperature Stability ΔVout/(Vout·ΔT) 0.5 % 3
Input Voltage Range 18 V 3
Operating Junction Temperature -40 125 °C 3
Maximum Input Voltage 18 V 2
Operating Junction Temperature (TJ) TJ 150 °C 2
Environment Temperature (TA) TA 85 °C 2
Storage Temperature Ts -50 140 °C 2
Lead Temperature and Time 260 °C 10S 2
Power Dissipation SOT-89-3 0.5 W SOT-89-3 2

CAD (KiCad official)

  • Symbol: BL8550-33CB
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: bl8550-33cb-etched.step / bl8550-33cb-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl8550-33cb.step / bl8550-33cb.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: BL(Shanghai Belling) datasheet (6 pp, sha256 c58d8646db92b34d, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF