Launch of industry’s smallest 6 A, 20 A, and 25 A buck regulator modules

Vishay has released new 6 A, 20 A, and 25 A microBRICK synchronous buck regulator modules which provide for higher power density and efficiency in point-of-load power supplies. Supplied in a 10.6 mm x 6.5 mm x 3 mm package, the SiC931, SiC951, and SiC967 are the smallest modules of their kind on the market, with the lowest height. 

Operating over a wide input-voltage range, the new regulator modules are comprised of two high-performance MOSFETs, an inductor, and a controller. This means that few external components are needed for configuration and loop compensation, and helps power-system designers to achieve high system-level power density. 

The SiC931 features four programmable switching frequencies: 600 kHz, 1 MHz, 1.5 MHz, and 2 MHz, while the SiC967 has an adjustable switching frequency in a range from 100 kHz to 2 MHz. The SiC951’s frequency is adjustable between 300 kHz and 1.5 MHz. 

All three buck regulator modules offer an adjustable current limit, while the SiC931 features an adjustable soft-start. The PMBus 1.3-compliant SiC951 supports sequential, tracking, and simultaneous operation.

The SiC951 and SiC967 can operate in any of three modes: forced continuous conduction, ultrasonic, and power save. The SiC931 supports forced continuous conduction and power save modes. 

The constant on-time (COT) architecture delivers very fast response to transients, with minimum output capacitance and tight ripple regulation at very light loads. It also maintains loop stability regardless of the type of output capacitor used.