BLL2681 Power Management IC – 1.2A Synchronous High-Side Buck Converter | 7–70V, Adjustable 3–40V, 150kHz, SOP8

The BLL2681 is a high-performance Power Management IC featuring a built-in high-side MOSFET synchronous DC/DC step-down (buck) converter with PWM/PFM control.
It supports a 7V to 70V input voltage range and provides an adjustable output voltage from 3V to 40V via a 1V feedback reference, making it ideal for DPS, PoE, and industrial applications.

Delivering up to 1.2A output current, the BLL2681 achieves 92% efficiency with stable voltage regulation across varying loads.
Its SOP8 package ensures compact integration in industrial and power distribution systems.

Key Specifications

• Input Voltage (VIN): 7V – 70V

• Output Voltage (VOUT): Adjustable (3–40V, VFB = 1V)

• Output Current (IOUT): Up to 1.2A

• Switching Frequency (FOSC): 150kHz

• Topology: Synchronous High-Side Buck Converter

• Power Switching: Built-in MOSFET

• Control Mode: PWM/PFM

• Efficiency: Up to 92%

• Max Duty Cycle: 91%

• Output Accuracy: ±2%

• Package: SOP8

Applications

• DPS (Digital Power Supply)

• PoE (Power over Ethernet)

• Industrial power modules

• Embedded DC/DC applications

• High-voltage automotive and battery-powered systems

Features

• Built-in high-side MOSFET for compact design

• Adjustable output voltage 3–40V

• PWM/PFM control for high efficiency

• Wide 7–70V input voltage range

• High efficiency up to 92%

• SOP8 package for space-efficient layouts