The MPQ4436/4436A is a frequency programmable, synchronous, step-down switching regulator with integrated internal highside and low-side power MOSFETs. It provides 6A (or less) of highly efficient output, with current mode control for fast loop response.
The wide 3.3V to 45V input range accommodates a variety of step-down applications in an automotive input environment. A 1.7μA shutdown mode quiescent current allows the part to be used in battery-powered applications.
High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency in light-load conditions to reduce the switching and gate driving losses.
An open-drain power good signal indicates that the output is within 93% to 106% of its nominal voltage.
Frequency foldback helps prevent inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation.
High-duty cycle and low dropout mode are provided for the automotive cold crank condition.
The MPQ4436/4436A is available in a QFN-20 (4mmx4mm) package.