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Monolithic Power Systems (MPS) MP4322 Step-Down Switching Converters are 350kHz to 2.5MHz configurable-frequency synchronous converters with integrated internal high-side and low-side power MOSFETs. These converters offer up to 2A continuous output current with peak current mode control. The MP4322 converters operate in Advanced Asynchronous Modulation (AAM) mode and optimize efficiency under no-load and light-load conditions. These converters employ a 128-step triangular profile and 15kHz modulation frequency to spread the internal switching frequency across a 20% (±10%) window.
The MP4322 converters feature 20μA sleep mode Quiescent current (IQ), 42V load dump tolerance, Power Good (PG) output, Hiccup Over-Current Protection (OCP), and Low-Dropout (LDO) mode. These converters are CISPR25 Class 5 compliant and are available in a QFN-12 (2mm x 3mm) package with wettable flanks. The MP4322 converters are used in USB chargers, general consumer, battery-powered systems, and aftermarket automotive applications.
