Vishay Introduces Two microBUCK Synchronous Buck Regulators

Vishay Intertechnology has recently introduced two new families of 2 A to 12 A microBUCK synchronous buck regulators featuring wide input voltage ranges from 4.5 V to 55 V and 4.5 V to 60 V.

Combining rugged high performance n-channel trench MOSFETs with a controller in the compact 5×5 PowerPAK package, the Vishay Siliconix devices deliver high efficiency and power density, while their internal compensation reduces the external component count.

The microBUCK regulators announced today share the same controller IC and package outline while providing a range of MOSFET ratings from which designers can select the best combination of cost and performance.

Offering a low 156 µA operating current and peak efficiency up to 98 %, the regulators released today allow designers to increase power density by reducing power losses. Combined with the superior thermal design of the 5 mm x 5 mm PowerPAK package, their efficiency enables cooler operation for improved long term reliability while eliminating the need for a heatsink.

With their input voltage ranges and an adjustable output voltage from 24 V down to 0.8 V, SiC466/7/8/9 and SiC476/7/8/9 family regulators are ideal for a wide range of applications. These include DC/DC converters for industrial and factory automation, home automation, industrial computing, base station power supplies, 5G network equipment and small cells, wall transformer regulation, robotics, drones, battery management systems, power tools, and vending, ATM, and slot machines.

Highly configurable, the regulators feature adjustable switching frequencies from 100 kHz to 2 MHz, adjustable soft start and current limits, and two operating modes: forced continuous conduction or power save. The internal compensation in both families eliminates the need for external RC networks.

The microBUCK COTarchitecture delivers ultrafast transient response with minimum output capacitance and tight ripple regulation at light loads.

It also enables loop stability regardless of the type of output capacitor used, including low ESR ceramic capacitors. The regulators integrate a robust protection feature set, including output overvoltage protection (OVP), output undervoltage protection (UVP), overcurrent circuit protection (OCP), short circuit protection (SCP) with auto retry, over temperature protection (OTP), and a power good flag.

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