The APW7060 integrates a synchronous buck PWM controller and a linear controller to provide two regulated voltages in a single package. The PWM controller drives external N-channel MOSFETs and operates at a fixed 600kHz frequency. When the input supply drops close to the output, the upper MOSFET remains on, achieving 100% duty cycle. Internal loop compensation is optimized for fast transient response, eliminating external compensation network. The linear controller drives an external N-channel MOSFET to form a linear regulator. The internal 0.8V reference makes this part suitable for a wide variety of low voltage applications.