BLL2770 Power Management IC – 3.5A CC DC/DC Buck Converter | 7–40V, 135kHz, SOP8

The BLL2770 is a high-performance Power Management IC featuring a built-in MOSFET synchronous DC/DC step-down (buck) converter with constant-current (CC) control.
It supports a 7V to 40V input voltage range, making it ideal for automotive car light applications and other high-voltage DC/DC systems.

Capable of delivering up to 3.5A output current, the BLL2770 achieves 93% efficiency with a 100% maximum duty cycle, ensuring stable power delivery under varying loads.
Its SOP8 package allows for easy integration in automotive PCB designs.

Key Specifications

• Input Voltage (VIN): 7V – 40V

• Output Voltage (VOUT): Adjustable

• Output Current (IOUT): Up to 3.5A

• Switching Frequency (FOSC): 135kHz

• Topology: Constant-Current (CC) Synchronous Buck Converter

• Power Switching: Built-in MOSFETs

• Efficiency: Up to 93%

• Max Duty Cycle: 100%

• Output Accuracy: ±3%

• Package: SOP8

Applications

• Automotive car lights

• High-voltage DC/DC automotive modules

• Embedded automotive electronics

• Battery-powered automotive systems

Features

• Constant-current control for automotive lighting

• High-current output up to 3.5A

• Integrated MOSFETs for compact design

• Wide input voltage range 7–40V

• High efficiency up to 93%

• SOP8 package for easy PCB integration