GM38C43 Overview
GM38C4x is fixed frequency, high performance, and current- mode PWM controllers. Gamma's BiCMOS devices are pin patible with standard 384x bipolar devices but with several improvements. Undervoltage lockout circuitry allows the '42 and '44 versions to start up at 14.5V and operate down to 9V, and the '43 and '45 versions start at 8.4V with operation down to 7.6V.