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BL8531CB5TR50

Public Made by Adom

by adom

BL Shanghai Belling DC-DC Converters, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)bl8531cb5tr50factory-2.0.0extractor-text
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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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BL8531CB5TR50

BL Shanghai Belling · DC-DC Converters · SOT-23-5

BL8531CB5TR50 from BL Shanghai Belling, in a SOT-23-5. 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 CE input Chip enable, active high; CE high threshold is 0.8V max and low threshold 0.3V min, and the pin voltage is limited to -0.3V to (Vout+0.3V).
2 OUT power_in Output feedback pin and power supply for the internal circuitry, connected to the output filter capacitor.
3 NC unconnected No connection.
4 GND power_in Ground.
5 Lx output Switching pin connected to the inductor and Schottky diode, with a maximum output current of 0.7A.

Key specifications

Parameter Value
Manufacturer BL Shanghai Belling
Package SOT-23-5
Category Power Management (PMIC)
Pins 5

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 VOUT 4.9 5 5.1 V 3
Input voltage range 0.8 V 3
Inductor 10 27 100 μH 3
Input capacitor 0 10 μF 3
Output capacitor 47 100 220 μF 3
Ambient temperature -40 85 C 3
Input current IIN 12 15 uA IOUT=0mA, VIN =VOUT*0.6 3
Start-up voltage VSTART 0.8 0.9 V IOUT=1mA VIN: 02V 3
Hold-on voltage VHOLD 0.6 0.7 V IOUT=1mA, VIN: 20V 3
Quiescent current drawn from power source IDD 4 7 uA Without external components, VOUT =VOUT×1.05 3
Switch ON resistance RSWON 0.4 0.5 Ω 3
LX leakage current ILXLEAK 0.5 5 uA VOUT=VLX=6V 3
Input voltage VIN 7 V 3
CE high threshold voltage VCEH 0.8 V VCE: 02V 3
CE low threshold voltage VCEL 0.3 V VCE: 20V 3
Oscillator duty cycle MAXDTY 70 75 80 % On(VLX“L”)side 3
Oscillator frequency FOSC 350 KHz LX on “L” side, VOUT=VOUT*0.96 3
Efficiency 85 % 3
Input voltage range -0.3 12 V 2
Input voltage -0.3 V 2
CE pin voltage -0.3 V 2
Lx pin output current 0.7 A 2
Operating junction temperature TJ 125 C 2
Ambient temperature TA -40 85 C 2
Power dissipation 250 mW SOT-23-5 2
Storage temperature TS -40 150 C 2
Lead temperature & time 260 C 10S 2

CAD (KiCad official)

  • Symbol: BL8531CB5TR50
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: bl8531cb5tr50-etched.step / bl8531cb5tr50-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl8531cb5tr50.step / bl8531cb5tr50.glb are the bare package body.

Provenance

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

  • Datasheet: BL Shanghai Belling datasheet (11 pp, sha256 f28e740a06541198, retrieved 2026-10-18, 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