The MPQ4360 is a configurable-frequency, synchronous, step-down switch-mode converter with integrated, internal high-side and low-side power MOSFETs. The device provides up to 6A of highly efficient output current (IOUT), with current mode control for fast loop response. The wide 3.3V to 40V input voltage (VIN) range accommodates a variety of step-down applications in an automotive input environment. The 1.7μA shutdown current (ISD) allows the part to be used in battery-powered applications.
High power conversion efficiency across the wide load range is achieved by scaling down the switching frequency (fSW) under light-load conditions to reduce the switching and gate driving losses. An open-drain power good (PG) signal indicates whether the output voltage (VOUT) is between 95% and 105% of its nominal voltage.
Frequency foldback prevents inductor current (IL) runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. A high duty cycle and low-dropout mode are provided for automotive cold-crank conditions.
The MPQ4360 is available in a QFN-20 (4mmx4mm) package.
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