Vishay Releases New Integrated Synchronous Buck Regulator With Wide Voltage Range to 28V
Vishay Intertechnology, Inc. announced a new device in the microBUCK™ family of integrated synchronous buck regulators. The 6-A SiC414 is a dc-to-dc converter solution featuring an advanced controller IC with gate drivers, two PWM-optimized n-channel MOSFETs (high and low side), and a bootstrap switch in a standalone buck regulator configuration in a space-saving MLPQ 4 by 4mm 28-pin package.
The device offers a wide input voltage range of 3 to 28V, with minimum output voltages down 0.75V. The regulator minimizes EMI by eliminating PCB traces, while the device’s high- and low-side MOSFETs provide low on-resistance for reduced power losses and better performance.
The SiC414 offers the small form factor needed for super-compact, battery-operated portable computing. The constant-on-time controller provides superior transient response. This can reduce output filter cost for a given load regulation target. The device’s ultrasonic power save mode delivers improved light-load efficiency, making it well suited for CPU and GPU core voltage regulation in notebook, desktop, and server computers; set-top boxes and HDTVs; and digital consumer equipment.
The microBUCK regulator offers a high power density and improved thermal performance under the full load condition. The device provides high efficiency of 95%, and is capable of operating with all ceramic solutions and switching frequencies up to 1 MHz. In addition, the SiC414’s internal fixed LDO may be used to supply 5V for the gate drive circuits, or it may be bypassed with an external 5V supply for optimum efficiency and used to drive external n-channel MOSFETs or other loads.
For reliable operation and easy system integration, the device features cycle-by-cycle current limiting, an enable pin, internal soft start, under-voltage lockout, over-voltage protection, a power good output, and thermal shutdown at + 150°C. The SiC414 is halogen-free according to IEC 61249-2-21I and compliant to RoHS directive 2002/95/EC.
Samples and production quantities of the new microBUCK regulator are available now, with lead times of 10 weeks for initial orders. Pricing for U.S. delivery in 1,000-piece quantities is $1.89 each.
