Integrated 25A to 40A DrMOS Power Stages for POLs

To meet the need for high-current, high-efficiency, and high-power-density performance in next-generation notebooks, ultrabooks, and desktops, Vishay Intertechnology, Inc. today introduced five new VRPower® integrated DrMOS power stage solutions for multiphase POL regulator applications. Combining power MOSFETs, a MOSFET gate driver IC, and a bootstrap Schottky diode in thermally enhanced 4.5 mm by 3.5 mm PowerPAK® MLP4535-22L and 5 mm by 5 mm PowerPAK MLP55-31L packages, the Vishay Siliconix SiC530CD (30A), SiC531CD (25A), SiC532CD (25A), SiC631CD (40A), and SiC632CD (40A) offer a 45% smaller footprint compared with discrete solutions. The devices' high power density is optimized for computing platforms using the Intel® Skylake platform. The devices are also suitable for industrial PC and high-current multiphase modules used in networking and industrial applications.

In addition to their high-current capabilities and footprint savings, the power stages also lower package parasitics to enable switching frequencies up to 2 MHz — 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 utilize Vishay's state-of-the-art Gen IV TrenchFET® technology to reduce switching and conduction losses. The power stages' driver IC is compatible with a wide range of pwm controllers and supports tri-state pwm logic of 5 V.

The SiC530CD, SiC531CD, SiC532CD, SiC631CD, and SiC632CD are optimized 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 5µA when systems are operating in standby mode, and they can be woken from this state within 5µs. Protection features for the RoHS-compliant, halogen-free devices include undervoltage lockout (UVLO).

All these devices have an input voltage range of 4.5- to 24-V, except the SiC530CD which has an input voltage range of 4.5- to 18-V. Samples and production quantities of the power stages are available now, with lead times of 10 weeks. Pricing for U.S. delivery only starts at $1.09 per piece for the SiC531CD, $1.17 for the SiC532CD, $1.22 for the SiC530CD, $1.52 for the SiC632CD, and $1.56 for the SiC631CD.