Vishay Intertechnology has launched five new VRPower integrated DrMOS power stage devices. Nick Flaherty reports
To meet the need for high-current, high-efficiency, and high-power-density performance in next-generation equipment, Vishay Intertechnology has launched five new VRPower integrated DrMOS power stage devices.
Combining power MOSFETs and an advanced MOSFET gate driver IC with a bootstrap Schottky diode in thermally enhanced 4.5mm by 3.5mm PowerPAK MLP4535-22L and 5mm by 5mm PowerPAK MLP55-31L packages, the Vishay Siliconix SiC530CD, SiC531CD, SiC532CD, SiC631CD, and SiC632CD are 45% smaller than discrete solutions.
The devices' high power density is optimised for computing platforms using the Intel Skylake platform but are also suitable for industrial PC and high-current multiphase point og load (POL) modules used in networking and industrial applications.
Today's platforms require higher currents than their predecessors, while consumers demand ever-smaller form factors. The integrated devices released today offer continuous current up to 30A in the 4.5mm by 3.5mm PowerPAK MLP4535-22L package and 40A in the 5mm by 5mm PowerPAK MLP55-31L package.
In addition to their high-current capabilities and footprint savings, the power stages also lower package parasitics to enable switching frequencies up to 2MHz — further shrinking the overall solution size and profile by reducing the size of the output filter. For high performance, the devices' high- and low-side MOSFETs use Vishay's fourth generation TrenchFET technology to reduce switching and conduction losses. The power stage driver IC is compatible with a wide range of PWM controllers and supports tri-state PWM logic of 5V.
The devices are optimised for synchronous buck converters, DC/DC voltage regulation modules, and multiphase VRDs for CPUs, GPUs, and memory. To increase light-load efficiency in these applications, the devices' driver IC incorporates diode emulation mode circuity and zero-current detect. An adaptive dead time control helps to further improve efficiency at all load points. To support PS4 mode light-load requirements for IMVP8, the power stages reduce current consumption to 5 µA when systems are operating in standby mode, and they can be woken from this state within 5 µs. Protection features for the RoHS-compliant, halogen-free devices include undervoltage lockout (UVLO).