Exar has announced a universal power management IC (PMIC) that combines three synchronous MOSFET power stages in a 4mm x 4mm, 32-pin TQFN package. The XR77103 features an I2C interface that is used to control output voltage from 0.8V to 6V, switching frequency from 300kHz to 2.2MHz, power sequencing, and current limit.

The XR77103 operates from an input supply of 4.5V to 14V, and all three outputs are rated for 2A load currents with peak currents up to 3A. A current-mode control architecture allows output paralleling to achieve up to 5A. In addition, a selectable pulse-skipping mode improves efficiency at light loads.


The XR77103 is configurable through its I2C interface using PowerArchitect 4 design and configuration software to provide power management for a range of FPGAs, SoCs, DSPs and video processors. Two pin-compatible non-programmable versions of the device are also available offering a fixed switching frequency of 500kHz and 1MHz.

Prices for the programmable and non-programmable versions of the XR77103 start at $1.95 and $1.60, respectively, in lots of 1,000 units.