Summary of 2A TO 12A SYNCHRONOUS BUCK REGULATORS WITH PEAK EFFICIENCIES OF 98%
Vishay Intertechnology introduced two new microBUCK synchronous buck regulator families (SiC46x and SiC47x) offering 2A to 12A output currents. These regulators feature wide input voltage ranges up to 60V, high efficiency reaching 98%, and a compact 5×5 PowerPAK package. Internal compensation reduces external component needs, while adjustable switching frequencies and operating modes enhance design flexibility for industrial, automation, and power supply applications.
Parts used in the microBUCK Synchronous Buck Regulators:
- n-channel trench MOSFETs
- Controller IC
- 5×5 PowerPAK® package
- Internal compensation circuitry
- Adjustable soft start mechanism
- Current limit settings
- Forced continuous conduction mode
- Power save mode
Vishay Intertechnology, Inc. has introduced two new families of 2A to 12A microBUCK® synchronous buck regulators featuring wide input voltage ranges from 4.5V to 55V (SiC476/7/8/9) and 4.5V to 60V (SiC466/7/8/9). 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 156µA 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 5mm x 5mm PowerPAK package, their efficiency enables cooler operation for improved long-term reliability while eliminating the need for a heatsink.
The microBUCK wide safe operating area gives designers flexibility to support a wide range of operating temperature and current requirements. This allows designers to shrink the PCB size, simplify thermal management, and reduce system costs.
With their input voltage ranges and an adjustable output voltage from 24V down to 0.8V, SiC466/7/8/9 and SiC476/7/8/9 family regulators are designed 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.
The new SiC46x family devices are the 2A SiC469, 4A SiC468, 6A SiC467, and 10A SiC466, while the new SiC47x family devices are the 3A SiC479, 5A SiC478, 8A SiC477, and 12A SiC476. All are footprint-compatible to provide a scalable solution to designers.
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.
Read more: 2A TO 12A SYNCHRONOUS BUCK REGULATORS WITH PEAK EFFICIENCIES OF 98%
- What is the peak efficiency of these regulators?
The regulators achieve a peak efficiency of up to 98%. - Can designers adjust the switching frequency?
Yes, the switching frequency is adjustable from 100 kHz to 2 MHz. - Do these devices require external RC networks for compensation?
No, internal compensation eliminates the need for external RC networks. - What is the maximum input voltage for the SiC466/7/8/9 family?
The SiC466/7/8/9 family supports an input voltage range up to 60V. - Is a heatsink required for operation?
No, the superior thermal design allows cooler operation without a heatsink. - How many operating modes are available?
There are two operating modes: forced continuous conduction or power save. - Are the different current ratings footprint-compatible?
Yes, all devices are footprint-compatible to provide a scalable solution. - What is the minimum output voltage supported?
The adjustable output voltage can go down to 0.8V. - Does the device support low operating current?
Yes, it offers a low 156µA operating current. - Which applications are these regulators designed for?
They are designed for industrial automation, 5G equipment, robotics, drones, and battery management systems.
