BLL2631 Power Management IC – 1.2A Synchronous Buck Converter | 4.2–24V, 1.2MHz

The BLL2631 is a high-efficiency Power Management IC integrating a synchronous DC/DC step-down (buck) converter with built-in MOSFETs, designed for wide input voltage applications requiring stable and compact power delivery.
It supports a 4.2V to 24V input voltage range and provides an adjustable output voltage, making it suitable for consumer, industrial, and embedded applications.

Capable of delivering up to 1.2A output current, the BLL2631 offers stable voltage regulation and high efficiency with a 1.2MHz switching frequency, enabling small external components and compact PCB layouts.

Key Specifications

• Input Voltage (VIN): 4.2V – 24V

• Output Voltage (VOUT): Adjustable

• Output Current (IOUT): Up to 1.2A

• Switching Frequency (FOSC): 1.2MHz

• Topology: Synchronous Buck Converter

• Power Switching: Built-in MOSFETs

• Control Mode: PWM

• Package: ESOP8 / SOT23-6 (depending on variant)

Applications

• Consumer electronics

• Embedded systems

• Industrial electronics

• Point-of-load regulation

• Networking and communication equipment

• Compact DC/DC power rails

Features

• Wide input voltage range up to 24V

• 1.2MHz high-frequency operation for compact designs

• Integrated synchronous MOSFETs

• High efficiency and stable output regulation

• Supports up to 1.2A output current

• Compact packages suitable for high-density layouts