component
BL8558-25PRN
Public Made by Adomby adom
BL(Shanghai Belling) Linear Voltage Regulators (LDO), SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBL8558-25PRN
BL(Shanghai Belling) · Linear Voltage Regulators (LDO) · SOT-23-5
BL8558-25PRN 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 | Vin | power_in | Input pin; recommended input range is up to 8V (absolute maximum 10V), with a 1uF input capacitor recommended. |
| 2 | Vss | power_in | Ground pin. |
| 3 | CE | input | Chip enable pin; high level is 1.5V to Vin, low level is 0 to 0.25V (standby), with an internal pull-down resistance of 2.0 to 10.0 MΩ (typ. 5.0 MΩ). |
| 4 | NC | unconnected | No connection. |
| 5 | Vout | power_out | Regulated output pin (2.5V for the BL8558-25PRN, ±2% accuracy), up to 500mA, with a 3.3uF/4.7uF output capacitor recommended for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BL(Shanghai Belling) |
| Package | SOT-23-5 |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | Vin | 8 | V | 5 | |||
| Maximum Output Current | Iout (Max.) | 500 | mA | Vin-Vout=1V | 5 | ||
| Dropout Voltage | Vdrop1 | 88 | 120 | mV | Vout≥2.8V, Iout=100mA | 6 | |
| Dropout Voltage | Vdrop1 | 270 | 350 | mV | Vout≥2.8V, Iout=300mA | 6 | |
| Dropout Voltage | Vdrop1 | 460 | 600 | mV | Vout≥2.8V, Iout=500mA | 6 | |
| Line Regulation | ΔVout/(ΔVin·Vout) | 0.05 | 0.2 | %/V | Iout=40mA, 2.8V≤Vin≤8V | 6 | |
| Load Regulation | ΔVout/ΔIout | 20 | 40 | mV | Vin=Set Vout+1V, 1mA≤Iout≤500mA | 6 | |
| Supply Current | Iss | 75 | 90 | uA | Vin=Set Vout+1V | 6 | |
| Supply Current (Standby) | Istandby | 0.1 | 1 | uA | Vin=Set Vout+1V, Vce=GND | 6 | |
| CE Pull down Resistance | Rpd | 2 | 5 | 10 | MΩ | 6 | |
| CE Input Voltage H | Vceh | 1.5 | V | max Vin | 6 | ||
| CE Input Voltage L | Vcel | 0.25 | V | min 0 | 6 | ||
| Output Voltage Temperature Coefficient | ΔVout/(ΔT·Vout) | 100 | ppm/°C | Iout=30mA, printed ±100 | 6 | ||
| Ripple Rejection | PSRR | 65 | dB | F=100Hz, Ripple=0.5Vp-p, Vin=Set Vout+1V | 6 | ||
| Short Current Limit | Ilim | 200 | mA | Vout=0V | 6 | ||
| Output Noise | en | 47 | uVrms | BW=10Hz~100kHz | 6 | ||
| Max input voltage | 10 | V | 5 | ||||
| Junction Temperature | TJ | 125 | °C | 5 | |||
| Output Current | 500 | mA | 5 | ||||
| Power Dissipation SOT-23-5 | 250 | mW | SOT-23-5 | 5 | |||
| Storage Temperature | Ts | -45 | 150 | °C | 5 | ||
| Input Voltage Range | 8 | V | 5 | ||||
| Ambient Temperature | -40 | 85 | °C | 5 |
CAD (KiCad official)
- Symbol:
BL8558-25PRN - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
bl8558-25prn-etched.step/bl8558-25prn-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bl8558-25prn.step/bl8558-25prn.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BL(Shanghai Belling) datasheet (10 pp, sha256
df6d8294f239f8d4, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-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).