International Rectifier has introduced two one-percent accurate, single output, synchronous buck PWM controllers with 4.5V to 16V input voltage capability. The IR3637SPbF and IR3637ASPbF are compact and simple solutions for up to 15A DC-DC point-of-load applications.

Lead-free and compliant with the Restriction of Hazardous Substances Directive (RoHS), these two PWM controllers feature a 0.8V, one percent accurate voltage reference. Both ICs include short-circuit protection, input under-voltage lockout, and an externally programmable soft-start function. The devices are available in the standard SO-8 package.

Operating at 400kHz, the IR3637SPbF is suitable for output currents up to 15A. The IR3637ASPbF runs at 600kHz and provides optimum efficiency in applications requiring less than 7A.

Also available is the IRDC3637 Reference Design, which demonstrates performance for a 5V input, 1.8V output, DC-DC converter delivering 7A of output current, using the IR3637SPbF.