Datasheet SiC967 (Vishay) - 6

SiC967
www.vishay.com Vishay Siliconix
FUNCTIONAL BLOCK DIAGRAM
V V V V BOOT V IN CIN DRV DD IN VDD VDRV_LDO VDD_LDO HS DRV 5 μA UVLO VDD UVLO Mode MODE detector Ramp generator High side VSNS driver - PHASE PHASE + PWM comparator Control V logic Ultrasonic OUT VDRV V - FB SS - OTA + Low side driver 0.8 V VREF Zero Over   GL crossing current Output Over PGND monitor temperature (OV / UV) PHASE VFB t / min. t f On time on off SW Power generator V good IN EN I A P LIM GND GOOD
Fig. 5 - Functional Block Diagram OPERATIONAL DESCRIPTION Device Overview
• Over temperature protection with hysteresis SiC967 is a high efficiency synchronous buck regulator • Dedicated enable pin for easy power sequencing module capable of delivering up to 10 A continuous current. • Power good open drain output The device has programmable switching frequency of • This device is available in MLP54-A6C package to deliver 100 kHz to 2 MHz. The control scheme is based on voltage high power density and minimize PCB area mode constant on time. It delivers fast transient response and minimizes external components. Thanks to the internal
Power Stage
current ramp information, no high ESR output bulk or virtual SiC967 integrates a high performance power stage with ESR network is required for the loop stability. This device n-Channel MOSFETs for both high-side and low-side also incorporates a power saving feature by enabling diode optimized to achieve up to 95 % efficiency. emulation mode and frequency fold back as the load The power input voltage (VIN) can go up to 60 V and down decreases. as low as 4.5 V for power conversion. SiC967 has a full set of protection and monitoring features: • Over current protection in pulse-by-pulse mode • Output overvoltage protection • Output undervoltage protection with device going into hiccup mode S23-0680-Rev. C, 28-Aug-2023
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