Vishay 4.5V to 20V microBUCK® DC/DC converter with PMBus interface

Vishay Intertechnology broadens its offering of microBUCK^® synchronous buck regulators with a new family of 15 A, 25 A, and 40 A devices featuring input voltages from 4.5 V to 20 V in the thermally enhanced 5 mm by 7 mm PowerPAK MLP34-57 package. Delivering increased power density and transient response compared to previous generation devices, Vishay Siliconix SiC45x family regulators offer PMBus 1.3 compliance for power system telemetry. SIC453ED-T1-GE3 is a PMBus 1.3 compliant non-isolated DC/DC buck regulator with integrated MOSFETs. It is capable of supplying up to 40A (SiC450) continuous output current. Its output voltage is digitally adjustable from 0.3V to 12V from a 4.5V to 20V input with switching frequencies up to 1.5MHz. SiC45x architecture delivers ultrafast transient response with minimum output capacitance and tight regulation over a broad load range. The device has integrated internal compensation and is stable with any type of output capacitor. The device incorporates a power-saving scheme that significantly increases light load efficiency. It allows power block configuration programs to be stored in non-volatile memory (NVM). Various operation parameters can all be locally stored and used to determine fault behaviour. Application includes server, cloud, and infrastructure, networking, telecom, storage applications, distributed point of load power architectures, DDR memory.

Key features

• Single supply operation from 4.5V to 20V, 1% output voltage accuracy over temperature
• PMBus 1.3 compliant with 1MHz bus speed, internal NVM
• V_OUT adjustability and reading resolution of 2mV, supports over 50 PMBus commands
• Supports in phase or 180° out of phase synchronization, output voltage source and sink capability
• PV_IN, V_OUT, I_IN and I_OUT and temperature reporting, differential output remote sensing
• Over current protection in pulse-by-pulse mode, over temperature protection with hysteresis
• Shutdown current is 2.5mA typical at (PV_IN = 12V, TJ = -40°C to +125°C)
• Load regulation is 1% typical at (PV_IN = 12V, TJ = -40°C to +125°C)
• Frequency setting range from 300 - 1500KHz
• Junction temperature range from -40°C to +150°C, PowerPAK MLP34-57 package

Applications

• Server, cloud, and infrastructure
• Networking, telecom, storage applications
• Distributed point of load power architectures
• DDR memory