BL8558 Power Management IC – 500mA Low-Noise High-PSRR CMOS LDO Linear Regulator | SOT89-3, SOT89-5, SOT23-3, SOT23-5, TO92

The BL8558 is a high-performance CMOS LDO linear regulator designed for battery-powered and low-noise applications requiring higher output current.
It supports an input voltage up to 10V and provides an adjustable output voltage from 1.2V to 4.5V with precise 0.1V step regulation.

Featuring low dropout voltage, high PSRR, and low output noise, the BL8558 ensures stable and clean power delivery even in noisy environments.
With a maximum output current of 500mA and fast transient response, it is ideal for powering RF modules, MCUs, and portable electronics.

Key Specifications

• Input Voltage (VIN): Up to 10V

• Output Voltage (VOUT): Adjustable (1.2V – 4.5V, 0.1V step)

• Output Current (IOUT): Up to 500mA

• Quiescent Current (IQ): 75µA

• Output Accuracy: ±2% / ±1%

• PSRR: 66dB @100Hz

• Operating Type: CMOS LDO Linear Regulator

• Packages: SOT89-3, SOT89-5, SOT23-3, SOT23-5, TO92

Applications

• Battery-powered equipment

• Mouse and handheld devices

• Mobile phones and consumer electronics

• Low-noise power rails for analog circuits

Features

• Low dropout voltage

• Low output noise

• High PSRR for superior ripple rejection

• Fast transient response

• Adjustable output with fine voltage steps

• Multiple package options for flexible desig