DESCRIPTION
The SiC641 and SiC641A are high frequency integrated
power stage optimized for synchronous buck applications
to offer high current, high efficiency, and high power density
performance with very low shutdown current. Packaged in
Vishay’s proprietary 5 mm x 5 mm MLP package, SiC641
and SiC641A enable voltage regulator designs to deliver up
to 55 A continuous current per phase.
The internal power MOSFETs utilize Vishay’s latest
TrenchFET® technology that delivers industry benchmark
performance to significantly reduce switching and
conduction losses.
The SiC641 and SiC641A incorporate an advanced
MOSFET gate driver IC that features high current driving
capability, adaptive dead-time control, an integrated
bootstrap switch, and user selectable zero current detection
to improve light load efficiency. The driver is also compatible
with a wide range of PWM controllers, supports tri-state
PWM, and 5 V and 3.3 V PWM logic.
The device also supports PS4 mode to reduce power
consumption when the system is in standby state.
The SiC641 and SiC641A offer operating temperature
monitoring, protection features, and warning flags that
improve system monitoring and reliability.

APPLICATIONS
• Multi-phase VRDs for computing, graphics card and
memory
• Intel core processor power delivery
- VCORE, VGRAPHICS, VSYSTEM AGENT
- VCCGI
• Up to 16 V rail input DC/DC VR modules

FEATURES
• Highly efficient
- Thermally enhanced PowerPAK® MLP55-31L
package
- Vishay’s latest TrenchFET technology and low
side MOSFET with integrated Schottky diode
- Integrated, low impedance, bootstrap switch
- Power MOSFETs optimized for 12 V input stage
- Supports PS4 mode light load requirement with low
shutdown supply current (5 V, 3 μA)
- Zero current detection for improved light load efficiency
• Highly versatile
- 5 V and 3.3 V PWM logic with tri-state and hold-off timer
- 5 V DSBL#, ZCD_EN# logic with PS4 state support
- High frequency operation up to 2 MHz
• Robust and reliable
- Delivers in excess of 55 A continuous current, 70 A, peak
(10 ms) and 100 A, peak (10 μs)
- Over current protection
- Over temperature flag
- Over temperature protection
- Undervoltage lockout protection
- High side MOSFET short detection
• Effective monitoring and reporting
- Accurate temperature reporting
- Warnings and faults reporting flag
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912