Vishay's 6 A, 20 A, and 25 A microBRICK® synchronous buck regulator modules are designed to deliver increased power density and efficiency for point of load (POL) converters. Offered in a 10.6 mm by 6.5 mm by 3 mm package, Vishay Siliconix's SiC931, SiC951, and SiC967 feature a small size, low height, and wide input voltage range from 4.5 V to 60 V. Up to 69% smaller than other solutions, the regulator modules each offer two high-performance MOSFETs, a controller, and an inductor with only minimal external components needed for configuration. The devices’ compact size dramatically increases power density while their high level of integration reduces design complexity and time to market. In power-saving mode, when the inductor current crosses zero the modules’ control scheme turns off the low-side MOSFET to deploy a diode emulation mode. The switching frequency decreases in proportion to load conditions. There is no minimum switching frequency limitation, allowing for the best possible efficiency at light loads. The devices’ constant on-time (COT) architecture delivers ultrafast transient response with minimum output capacitance and tight ripple regulation at very light loads. It also enables loop stability regardless of the type of output capacitor used, including low ESR ceramic capacitors.
Features
- Efficiently delivers power to FPGAs, ASICs, and SoC core power supplies
- Integrates high- and low-side MOSFETs, a PWM controller, and an inductor
- Output currents up to 25 A in a 10.6 mm by 6.5 mm by 3 mm package
- Versatile:
- 6 A (SiC967), 20 A (SiC931), and 25 A (SiC951) options
- Input voltages: 4.5 V to 60 V
- Adjustable output voltages down to 0.3 V
- Robust and reliable:
- Output overvoltage (OVP) and undervoltage protection (UVP)
- Cycle-by-cycle overcurrent protection (OCP)
- Short-circuit protection (SCP) with auto retry
- Overtemperature protection (OTP)
- Power good flag
- PMBus 1.3 compliant (SiC951)
- Highly efficient:
- Consumes minimum quiescent current
- Peak efficiency up to 97%
- Highly configurable
- Programmable switching frequencies at 600 kHz, 1 MHz, 1.5 MHz, and 2 MHz (SiC931)
- Adjustable switching ranges from 100 kHz to 2 MHz (SiC967) and 300 kHz to 1.5 MHz (SiC951)
- Adjustable current limit
- Adjustable soft start (SiC931)
- Support for sequential, tracking, and simultaneous operation (SiC951)
- The SiC951 and SiC967 offer three operating modes: forced continuous conduction, ultrasonic, and power save
- The SiC931 offers two operating modes: forced continuous conduction and power save mode
Applications
- SiC931: TVs, consumer electronics, and desktop computers
- SiC951: POL converters in servers, high-performance and cloud computing, and 5G telecom
- SiC967: industrial automation, surveillance systems, e-bikes, and motor drives
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Vishay's 6 A, 20 A, and 25 A microBRICK® synchronous buck regulator modules are designed to deliver increased power density and efficiency for point of load (POL) converters. Offered in a 10.6 mm by 6.5 mm by 3 mm package, Vishay Siliconix's SiC931, SiC951, and SiC967 feature a small size, low height, and wide input voltage range from 4.5 V to 60 V. Up to 69% smaller than other solutions, the regulator modules each offer two high-performance MOSFETs, a controller, and an inductor with only minimal external components needed for configuration. The devices’ compact size dramatically increases power density while their high level of integration reduces design complexity and time to market. In power-saving mode, when the inductor current crosses zero the modules’ control scheme turns off the low-side MOSFET to deploy a diode emulation mode. The switching frequency decreases in proportion to load conditions. There is no minimum switching frequency limitation, allowing for the best possible efficiency at light loads. The devices’ constant on-time (COT) architecture delivers ultrafast transient response with minimum output capacitance and tight ripple regulation at very light loads. It also enables loop stability regardless of the type of output capacitor used, including low ESR ceramic capacitors.
Hong Kong, China