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Monolithic Power Systems (MPS) MPQ4315 Synchronous Step-Down Converters offer a configurable frequency and integrated internal high-side MOSFET (HS-FET) and low-side MOSFET (LSFET). The MPQ4315 delivers up to 5A of highly efficient output, with current mode control for fast loop response.
The MPS MPQ4315 Synchronous Step-Down Converters operate over a wide 3.3V to 45V input range, ideal for various step-down applications in automotive input environments. Furthermore, a low 1.7μA shutdown mode quiescent current makes the MPQ4315 ideal for use in battery-powered applications. The device’s high power conversion efficiency across a wide load range is achieved by scaling down the switching frequency under light-load conditions to reduce the switching and gate driver losses. The device provides an open-drain power good signal that indicates whether the output is within 93% to 106% of its nominal voltage.
In addition, the MPQ4315 features frequency foldback, helping to 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 conditions.
The MPQ4315 is offered in a QFN-20 (4mm x 4mm) wettable flank package and is AEC-Q100 Grade 1 qualified.
