The device features an I2C interface, allowing customers to control output voltage (from 0.8V to 6V), switching frequency (from 300kHz to 2.2MHz), power sequencing and current limit. Exar has also released an updated version of the PowerArchitect 4 design and configuration software.
According to the company, the XR77103 operates from an input ranging from 4.5V to 14V, with the three outputs catering for 2A load currents, with peak currents up to 3A. The device features a current mode control architecture, which means outputs can be paralleled to provide up to 5A, making the XR77103 suitable for use with low power processors. A selectable Pulse Skipping Mode results in improved efficiency at light loads.
Two versions of the XR77103 offer a fixed set of features for designers not requiring the I2C interface. The XR77103ELB-A0R5 and –A1R0 have switching frequencies of 500kHz and 1MHz respectively, with both parts featuring a high accuracy 0.8V reference and output voltages set by external resistors.
All three parts come in 4 x 4mm QFN packages.
