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Monolithic Power Systems (MPS) MP4573 Integrated Synchronous Buck Converters achieve up to 2.5A of continuous output current with peak current control for an excellent transient response. The MP4573 operates over a wide 4.5V to 60V input voltage range that accommodates a variety of step-down applications in automotive input environments. A 2μA shutdown current is ideal for battery-powered applications.
The MPS MP4573 Buck Converters integrate internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively), enabling high efficiency without needing an external Schottky diode. The device’s Advanced Asynchronous Modulation (AAM) mode achieves high efficiency under light-load conditions by scaling down the frequency to reduce switching and gate driver losses.
The Converters offer many built-in features, including soft-start (SS), enable (EN) control, and power good (PG) indication. High duty cycle and low-dropout (LDO) mode allow the MP4573 to withstand automotive cold crank conditions. To avoid current runaway on the device, over-current protection (OCP) is employed with valley current detection. The MP4573 features short-circuit protection (SCP) with hiccup mode, input undervoltage lockout (UVLO), and auto-recovery thermal protection.
The MP4573 offers an ultra-compact solution that requires a minimal number of readily available, standard external components and is housed in a QFN-12 (2.5mm x 3mm) package.
