Five output digital voltage regulator in a QFN package addresses multi-rail power

A five output point of load (PoL) digital voltage regulator, the IRPS5401, has been launched by Infineon Technologies. It is designed for FPGAs, ASICs, and other multi-rail power systems.

The IRPS5401has been developed as a fully integrated power management integrated circuit (PMIC) that replaces multiple regulators with a single device in a compact 7.0 x 7.0mm, 56-pin QFN package. It is a particularly suitable for current and future applications in high density ASIC and FPGA, advises Infineon. Additional applications are CPU multi-rail systems, embedded computing systems, and communication and storage systems.

The IRPS5401 is already in use in the UltraZed system on a module (SoM) from Avnet. The compact package size combined with PMBus communications, for real-time monitoring and control, provides optimised power management, says Infineon. “With the integration level and excellent power density of the IRPS5401, we were able to implement two IRPS5401 devices onto our full-featured UltraZed SoM,” said Chris Ammann, global technical marketing engineer for power at Avnet. He added: “This gives us 10 rails that can be fully monitored and controlled with software, while maintaining a business card size footprint for the SoM.”

The IRPS5401 is designed for single rail operation ranging from 5.0 to 12V, where most PMICs are only 5.0V, points out Infineon. The regulator has one 500mA LDO output, and four configurable switching regulator outputs, two at 2.0A, and two at 4.0A. The outputs of the IRPS5401 can be used to provide the typical rails required for core, memory, and I/O voltages. The voltage output range is between 0.5 and 3.6V for regulators A to D, and between 0.25 and 5.1V for the LDO.

Switching regulator A can output up to 50A if combined with an external power stage, advises Infineon. Switching regulators C and D can be combined to deliver 8.0A in a low ripple, dual-phase configuration. All outputs are within the power requirements of most FPGAs and ASICs, ranging between 10 to 50W, including integrated voltage sequencing, according to Infineon. Industry standard PMBus commands provide an easy-to-use interface for status and telemetry. PMBus can also be used to configure the output voltages in 5mV steps.


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