BL8555 Power Management IC – 150mA Low-Noise High-PSRR CMOS LDO Linear Regulator | SOT23-5, SC70-5

The BL8555 is a low-noise CMOS LDO linear regulator optimized for ultra-low-power and noise-sensitive applications such as battery-powered and reference-voltage systems.
It supports an input voltage range of 1.8V to 8.0V and provides an adjustable output voltage from 1.2V to 5.0V in fine 0.1V steps, delivering excellent flexibility in low-voltage designs.

With a high PSRR of 65dB at 1kHz and an extremely low quiescent current of only 25µA, the BL8555 ensures clean, stable output while maximizing battery life. Its 150mA output current capability makes it well-suited for low-power analog and digital loads.

Key Specifications

• Input Voltage (VIN): 1.8V – 8.0V

• Output Voltage (VOUT): Adjustable (1.2V – 5.0V, 0.1V step)

• Output Current (IOUT): Up to 150mA

• Quiescent Current (IQ): 25µA

• Output Accuracy: ±2% / ±1%

• PSRR: 65dB @1kHz

• Noise Performance: Low-noise design

• Packages: SOT23-5, SC70-5

Applications

• Battery-powered equipment

• Mouse and low-power peripherals

• Reference voltage sources

• Portable consumer electronics

Features

• Low-noise output for sensitive circuits

• High PSRR for excellent ripple rejection

• Ultra-low quiescent current

• Adjustable output voltage with fine resolution

• Compact SOT23-5 and SC70-5 packages