The MP4576 is a fully integrated, fixed-frequency, synchronous step-down converter. It can achieve up to 600mA of continuous output current (IOUT) with peak current control for excellent transient response. The wide 4.5V to 60V input voltage (VIN) range accommodates a variety of step-down applications in automotive input environments. The device’s 2μA shutdown mode quiescent current (IQ) makes it ideal for battery-powered applications.
The device integrates internal high-side and low-side power MOSFETs for high efficiency without an external Schottky diode. It employs advanced asynchronous modulation (AAM) mode to achieve high efficiency under light-load conditions by scaling down the frequency to reduce switching and gate driver losses. Standard features include built-in soft start, enable control, and power good indication. A high duty cycle and low-dropout mode are provided for automotive cold crank conditions.
The MP4576 provides over-current protection (OCP) with valley current detection to avoid current runaway. It also has hiccup short-circuit protection (SCP), input under-voltage lockout (UVLO), and auto-recovery thermal protection. With internal compensation, the MP4576 can offer a very compact solution with a minimal number of readily available, standard external components. The MP4576 is available in a QFN-12 (2.5mmx3mm) package.
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