IR38064MTRPBF

The IR38064 PMBus SupIRBuck™ is an easy-to-use, fully integrated and highly efficient DC/DC regulator with I2C/PMBus interface. The onboard PWM controller and MOSFETs make IR38064 a space-efficient solution, providing accurate power delivery for low output voltage and high current applications. The IR38064 can be comprehensively configured via PMBus and the configuration stored in internal memory. In addition, PMBus commands allow run-time control, fault status and telemetry. The IR38064 can also operate as a standard analog regulator without any programming and can provide current and temperature telemetry in an analog format. The IR38064 is a 35A synchronous buck regulator with a selectable digital interface and an externally compensated fast, analog, PWM voltage mode control scheme to provide good noise immunity as well as fast dynamic response in a wide variety of applications. At the same time, enabling the digital PMBus interface allows complete configurability of output setting and fault functions, as well as telemetry. The switching frequency is programmable up to 1.5MHz and provides the capability of optimizing the design in terms of size and performance. IR38064 provides precisely regulated output voltage from 0.5V to 0.875*PVin programmed via two external resistors or digitally through PMBus commands. The IR38064 operates with an internal bias supply (LDO), typically 5.2V.

Applications

• Server Applications
• Netcomm applications
• Embedded telecom Systems
• Distributed Point Of Load Architectures

Key features

• Internal LDO allows single 21V operation
• Output Voltage Range: 0.5V to 0.875*PVin
• 0.5% accurate Reference Voltage
• Programmable Switching Frequency up to 1.5MHz using Rt/Sync pin or PMBus
• Internal Soft-Start with Pre-Bias Start-up
• Enable input with Voltage Monitoring Capability
• Remote Sense Amplifier with True Differential Voltage Sensing
• Fast mode I2C and 400 kHz PMBus interface
• Sequencing and tracking capable
• Selectable analog mode or digital mode
• 66 PMBus commands for configuration, control, fault protection and telemetry
• Thermally compensated current limit with configurable overcurrent responses
• Optional light load efficiency mode
• External synchronization with Smooth Clocking
• Dedicated output voltage sensing protection which remains active even when Enable is low
• Integrated MOSFETs and Bootstrap diode
• Operating junction temp: -40°C < Tj < 125°C
• Small Size 5mmx7mm PQFN
• Pb-Free (RoHS Compliant)