BL9366 Power Management IC – 0.6A Asynchronous DC/DC Buck Converter | 5–60V, 480kHz, SOT23-6

The BL9366 is a high-voltage Power Management IC with a built-in high-side MOSFET using an asynchronous DC/DC step-down (buck) architecture, designed for power meters and DPS systems.
It supports a 5.0V to 60V input voltage range and offers adjustable output voltage via a 0.812V feedback reference.

With PWM/PFM automatic operation, the BL9366 provides up to 0.6A output current and achieves efficiency up to 90%.
Its 480kHz switching frequency balances efficiency and EMI performance for reliable industrial power designs.

Key Specifications

• Input Voltage (VIN): 5.0V – 60V

• Output Voltage (VOUT): Adjustable (VFB = 0.812V)

• Output Current (IOUT): Up to 0.6A

• Quiescent Current (IQ): 0.7mA

• Switching Frequency (FOSC): 480kHz

• Efficiency: Up to 90%

• Max Duty Cycle: 90%

• Output Accuracy: ±2%

• Power Switching: Built-in high-side MOSFET

• Operating Mode: Asynchronous PWM / PFM

• Package: SOT23-6

Applications

• Power meters

• Distributed Power Systems (DPS)

• Industrial DC/DC converters

• Embedded control electronics

Features

• Wide 5–60V input voltage range

• Asynchronous buck topology

• Integrated high-side MOSFET

• Automatic PWM/PFM control

• Stable output regulation

• Small SOT23-6 package