BLL2683A Power Management IC – 3A Synchronous DC/DC Buck Converter | 7–70V, Adjustable 3–40V, 150kHz, QFN5×5-14L

The BLL2683A is a high-performance Power Management IC featuring a built-in 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.

Capable of delivering up to 3A output current, the BLL2683A achieves 94% efficiency with 91% maximum duty cycle, providing stable and reliable power for industrial and high-voltage applications.
Its QFN5×5-14L package allows for compact, high-density PCB integration.

Key Specifications

• Input Voltage (VIN): 7V – 70V

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

• Output Current (IOUT): Up to 3A

• Switching Frequency (FOSC): 150kHz

• Topology: Synchronous Buck Converter

• Power Switching: Built-in MOSFET

• Control Mode: PWM/PFM

• Efficiency: Up to 94%

• Max Duty Cycle: 91%

• Output Accuracy: ±2%

• Package: QFN5×5-14L

Applications

• DPS (Digital Power Supply)

• PoE (Power over Ethernet)

• Industrial power modules

• Embedded DC/DC systems

• High-voltage battery-powered applications

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 94%

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