BLL2745 Power Management IC – 5.5A Jitter + CC/CV DC/DC Buck Converter | 8.5–42V, 5.05V Output, 280kHz, QFN5×5-14L

The BLL2745 is a high-performance Power Management IC integrating a built-in MOSFET synchronous DC/DC step-down (buck) converter with Jitter + CC/CV control.
It supports an 8.5V to 42V input voltage range and provides a fixed 5.05V output, making it ideal for automotive car chargers and high-current DC/DC automotive applications.

Delivering up to 5.5A output current, the BLL2745 achieves 96% efficiency and operates at a high 280kHz switching frequency, enabling compact external components and high-density PCB designs.
Its QFN5×5-14L package supports space-efficient automotive layouts.

Key Specifications

• Input Voltage (VIN): 8.5V – 42V

• Output Voltage (VOUT): 5.05V fixed

• Output Current (IOUT): Up to 5.5A

• Switching Frequency (FOSC): 280kHz

• Topology: Jitter + CC/CV Synchronous Buck Converter

• Power Switching: Built-in MOSFETs

• Efficiency: Up to 96%

• Output Accuracy: ±2%

• Package: QFN5×5-14L

Applications

• Automotive car chargers

• DC/DC automotive power modules

• Embedded automotive electronics

• Battery-powered automotive systems

• High-current automotive devices

Features

• High-current output up to 5.5A

• Fixed 5.05V output for automotive applications

• High switching frequency (280kHz) for compact designs

• Jitter + CC/CV control for stable voltage and current regulation

• Integrated MOSFETs for space-efficient layout

• QFN5×5-14L package for high-density automotive PCB integration