Integrated DrMOS Power Stage - Vishay Siliconix
Description
SiC779
Vishay Siliconix
Integrated DrMOS Power Stage
DESCRIPTION
The SiC779 is an integrated solution that contains PWM optimized n-channel MOSFETs (high side and low side) and a full featured MOSFET driver IC.
The device complies with the Intel DrMOS standard for desktop and server Vcore power stages.
The SiC779 delivers up to 40 A continuous output current and operates from an input voltage range of 3 V to 16 V.
The integrated MOSFETs are optimized for output voltages in the ranges of 0.
8 V to 2.
0 V with a nominal input voltage of 12 V.
The device can also deliver very high power at 5 V output for ASIC applications.
The SiC779 incorporates an advanced MOSFET gate driver IC.
This IC accepts a single PWM input from the VR controller and converts it into the high side and low side MOSFET gate drive signals.
The driver IC is designed to implement the skip mode (SMOD) function for light load efficiency improvement.
Adaptive dead time control also works to improve efficiency at all load points.
The SiC779 has a thermal warning (THDN) that alerts the system of excessive junction temperature.
The driver IC includes an enable pin, UVLO and shoot through protection.
The SiC779 is optimized for high frequency buck applications.
Operating frequencies in excess of 1 MHz can easily be achieved.
The SiC779 is packaged in Vishay Siliconix high performance PowerPAK MLP 6 x 6 package.
Compact co-packaging of components helps to reduce stray inductance, and hence increases efficiency.
FEATURES
• Industry benchmark Gen III MOSFETs with integrated Schottky diode • DrMOS compliant gate driver IC • Enables Vcore switching at 1 MHz • Easily achieve > 93 % efficiency in multi-phase, low output voltage solutions • Low ringing on the VSWH pin reduces EMI • Pin compatible with DrMOS 6 x 6 version 4.
0 • Tri-state PWM input function prevents negative output voltage swing • 5 V logic levels on PWM • MOSFET threshold voltage optimized for 5 V driver bias supply • Automatic skip mode operation ...
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