PWM Controllers Boast One-Percent Accuracy

The IR3637SPbF and IR3637ASPbF are one-percent accurate, single-output, synchronous buck PWM controllers with an input voltage range of 4.5V to 16V. They feature a 0.8V, one-percent accurate voltage reference and include short-circuit protection, input under-voltage lockout and an externally programmable soft-start function. The IR3637SPbF operates at 400 kHz, suitable for output currents up to 15A for applications including desktop motherboard peripheral rails such as DDR memory and chip set power. The IR3637ASPbF runs at 600 kHz and is well-suited for applications requiring less than 7A such as FPGAs. 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. Available in a standard SO-8 package and in tubes or tape-and-reel, the price of either controller is $0.79 each/10,000. The devices are also lead-free and RoHS compliant. For more information, contact Wayne Yoshida, INTERNATIONAL RECTIFIER, El Segundo, CA. (310) 252-7726.