component
bl8531ccb5tr50
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BL Shanghai Belling DC-DC Converters, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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README
markdownBL8531CCB5TR50
BL Shanghai Belling · DC-DC Converters · SOT-23-5
BL8531CCB5TR50 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. VCEH ≥ 0.8V enables the controller; VCEL ≤ 0.3V puts the device into standby (Istandby ≤ 1uA). Absolute maximum: -0.3V to (VOUT+0.3V). |
| 2 | OUT | power_in | Output-voltage sense and internal power-supply pin. The chip's switch current flows from this pin through the die to GND, so this pin is fed from the boost output rail (up to 12V absolute max, typical trimmed values 2.5-6.0V). A 1nF ceramic filter cap between OUT and GND is recommended close to the pin for a stable sense reference. |
| 3 | NC | unconnected | No internal connection. Leave floating or tie to a convenient net per board layout. |
| 4 | GND | power_in | Ground reference and return for the internal switch current. Route the OUT filter capacitor's ground terminal close to this pin. |
| 5 | EXT | output | PFM driver output for the external switching transistor (NMOSFET gate or NPN base). Sources up to ~41mA (IEXTH) and sinks up to ~31mA (IEXTL) at nominal Vout=5.0V, with a fixed 400kHz oscillator and 70-80% on-side duty cycle. Absolute maximum swing: -0.3V to (VOUT+0.3V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BL Shanghai Belling |
| Package | SOT-23-5 |
| Category | PMIC |
| Pins | 5 |
Ordering variants
BL8531CCB5TR50BL8531CCB5TR50CB3TRBL8531CCB5TR50CC3TR
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 (5.0V variant) | Vout | 4.9 | 5 | 5.1 | V | Vin=0.6×Vout, Iout=10mA, Temperature=25C (table default) | 3 |
| Output voltage accuracy | -2 | 2 | % | 1 | |||
| Output voltage temperature-drift coefficient | 100 | ppm/C | 1 | ||||
| Quiescent current | IDD | 6 | 15 | uA | No external component, Vout =Vout×1.05 | 3 | |
| Input current (no load) | Iin | 20 | 25 | uA | Iout=0mA, Vin=Vout*0.6 | 3 | |
| Input voltage | Vin | 12 | V | 3 | |||
| Chip leakage current | Istandby | 1 | uA | VCE=0V | 3 | ||
| CE high threshold voltage | VCEH | 0.8 | V | VCE: 02V | 3 | ||
| CE low threshold voltage | VCEL | 0.3 | V | VCE: 20V | 3 | ||
| Oscillator frequency (EXT pin test) | Fosc | 400 | KHz | Vout=Vout*0.96 | 3 | ||
| EXT high output current (5.0V<=Vout<=6.9V) | IEXTH | -41 | mA | 5.0V<=Vout<=6.9V | 3 | ||
| EXT low output current (5.0V<=Vout<=6.9V) | IEXTL | 31 | mA | 5.0V<=Vout<=6.9V | 3 | ||
| Oscillator duty cycle | Duty | 70 | 75 | 80 | % | On(Vlx 'L') side | 3 |
| Output voltage range (absolute maximum) | -0.3 | 12 | V | 2 | |||
| EXT pin voltage (absolute maximum) | -0.3 | V | Max printed as (VOUT+0.3) | 2 | |||
| CE pin voltage (absolute maximum) | -0.3 | V | Max printed as (VOUT+0.3) | 2 | |||
| Operating junction temperature (Tj) | Tj | 125 | C | 2 | |||
| Ambient temperature (Ta), absolute maximum | Ta | -40 | 85 | C | 2 | ||
| Power dissipation SOT-23-5 | 250 | mW | SOT-23-5 package | 2 | |||
| Storage temperature (Ts) | Ts | -40 | 150 | C | 2 | ||
| Lead temperature | 260 | C | 10 s | 2 | |||
| Input voltage range (recommended) | 0.8 | V | Max printed as Vout | 2 | |||
| Inductor (recommended) | 10 | 100 | uH | 2 | |||
| Input capacitor (recommended) | 10 | uF | 2 | ||||
| Output capacitor (recommended) | 47 | 220 | uF | 2 | |||
| Ambient temperature (Ta), recommended | Ta | -40 | 85 | C | 2 |
CAD (KiCad official)
- Symbol:
BL8531CCB5TR50 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
bl8531ccb5tr50-etched.step/bl8531ccb5tr50-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bl8531ccb5tr50.step/bl8531ccb5tr50.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BL Shanghai Belling datasheet (None pp, sha256
728fb85b6bf28bac, 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).
Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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