The MP4572 is a fully integrated, fixed-frequency, synchronous step-down converter. It can achieve up to 2A 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 an automotive input environment. A 2μA shutdown mode quiescent current (IQ) makes the MP4572 ideal for battery-powered applications. The MP4572 integrates internal high-side and low-side power MOSFETs (HS-FETs and LS-FETs, respectively) for high efficiency without an external Schottky diode.
The device employs advanced asynchronous modulation (AAM), which achieves high efficiency under light loads by scaling down the frequency to reduce the switching and gate driver losses. Standard protection features include built-in soft start (SS), enable control, and a power good (PG) indicator. A high duty cycle and low-dropout mode are provided for automotive cold-crank conditions. In addition, the chip provides over-current protection (OCP) with valley current detection, which helps prevent current runaway. It also has hiccup short-circuit protection (SCP), input under-voltage lockout (UVLO), and auto-recovery thermal protection.
With internal compensation, the MP4572 offers a very compact solution with a minimal number of readily available, standard external components. It is available in a QFN-12 (2.5mmx3mm) package.
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The EVBL4572-QB-00A is an evaluation board designed to demonstrate the capabilities of the MP4572, a high-efficiency, synchronous step-down converter with integrated, internal high-side and low-side power MOSFETs (HS-FETs and LS-FETs, respectively). Using an MPS power inductor, the device can deliver up to 2A of continuous output current (IOUT), with peak current control for excellent transient response.
The MP4572 features advanced asynchronous modulation (AAM) mode and forced continuous conduction mode (FCCM). AAM helps achieve high efficiency under light-load conditions by scaling back the switching frequency (fSW) to reduce switching and gate driver losses.
The EVBL4572-QB-00A is a fully assembled and tested evaluation board. It generates 5V of output voltage (VOUT) and 2A of continuous IOUT across a wide 5V to 60V input voltage (VIN) range. The MP4572 is available in a QFN-12 (2.5mmx3mm) package.