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Intersil debuts 80A PMBus step-down power module

Posted: 04 Jan 2016     Print Version  Bookmark and Share

Keywords:Intersil  power module  PMBus  server  telecom 

Intersil has introduced what it describes as a complete PMBus enabled DC/DC single channel step-down advance power supply capable of delivering up to 80A of current and optimised for high power density applications. Operating over an input voltage range of 4.5V to 14V, the ISL8273M offers adjustable output voltages down to 0.6V and achieves up to 93 per cent conversion efficiencies.

For higher output current, up to four ISL8273Ms can be paralleled to supply up to 320A in a multiphase current sharing configuration. A unique ChargeMode control architecture offers a single clock cycle response to an output load step and can support switching frequencies up to 1MHz, detailed the company.


The power module integrates all power and most passive components and only requires a few external components to operate. A set of optional external resistors allows the user to easily configure the device for standard operation. For advanced configurations, a standard PMBus interface addresses such things as sequencing and fault management, as well as real-time full telemetry and point-of-load monitoring. Additionally, an on-board non-volatile memory can store the desired custom configuration and settings.

A fully customisable voltage, current and temperature protection scheme insures safe operation for the ISL8273M under abnormal operating conditions. The device is also supported by the PowerNavigator software, a full digital power train development environment.

The ISL8273M is aimed at applications that include server, telecom, storage and datacom; industrial/ATE and networking equipment; and general purpose power for ASIC, FPGA, DSP and memory.

The ISL8273M is available in a low profile compact 18mm x 23mm x 7.5mm fully encapsulated thermally enhanced HDA package.

ISL8273M block diagram

ISL8273M block diagram


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