Exar Introduces 1.5A PowerBlox Step Down Regulator with Smallest Solution Footprint

With a fixed frequency operation of 1.4MHz and optimized for a 12V input voltage, the XRP7659 is suitable for a variety of consumer oriented applications such as infotainment equipment and set top boxes. It is also ideal for distributed power architectures and for generic point of load conversions. Additionally, built in safety features like output over voltage, over temperature, cycle-by-cycle over-current and under voltage lockout (UVLO) protection ensure safe operation under abnormal operating conditions.

The addition of the XRP7659 broadens the selection of PowerBlox solutions for our customers, said Eric Pittana, Exar's Power Management Marketing Director. It provides a very compact, high-performance solution that's extremely easy to use, for point-of-loads up to 1.5Amp stepping down from the traditional 12V power rail.

Product Details

The XRP7659 is a non-synchronous PWM step-down (buck) voltage regulator capable of delivering an output current up to 1.5Amps. A wide 4.5V to 18V input voltage range allows for single supply operation from industry standard 5V, 9.6V and 12V power rails. With a 1.4MHz fixed operating frequency and current-mode control architecture, it provides fast transient response and achieves conversion efficiencies as high as 92%. An integrated soft-start prevents inrush current at turn-on, and in shutdown mode the supply current drops to 0.1µA. The XRP7659 offers the following protection schemes: output over voltage (open load), thermal shut-down, cycle-by-cycle over-current limit, and under voltage lockout (UVLO).