MP4576

The MP4576 is a fully integrated, fixed-frequency, synchronous step-down converter. It can achieve up to 600mA of continuous output current (I_OUT) with peak current control for excellent transient response. The wide 4.5V to 60V input voltage (V_IN) range accommodates a variety of step-down applications in automotive input environments. The device’s 2μA shutdown mode quiescent current (I_Q) 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.