The MPQ4385A-AEC1 is a configurable-frequency (200kHz to 2.5MHz) synchronous step-down switching regulator with integrated internal high-side and low-side MOSFETs (HS-FET and LS-FET, respectively). It provides a highly efficient 20A to 25A output current (I_OUT) with fixed frequency Zero-Delay pulse-width modulation (PWM) (ZDP^TM) control for optimal transient response. The wide 3.3V to 36V input voltage (V_IN) range accommodates a variety of step-down applications in automotive environments. A 1.5μA shutdown mode quiescent current (I_Q) allows the device to be used in battery-powered applications.

High power conversion efficiency across a wide load range is achieved by scaling down the switching frequency (f_SW) under light-load conditions to reduce switching and gate driver losses. An open-drain power good (PG) signal indicates whether the output voltage (V_OUT) is within 95% to 105% of its nominal value.

Frequency foldback helps prevent inductor current (I_L) runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. High duty cycle and low-dropout (LDO) mode are provided for automotive cold-crank conditions. 

The MPQ4385A-AEC1 is available in a TQFN-32 (5mmx6mm) package, and a high thermal conductivity package option is also offered to facilitate top-sided cooling applications. It is available in AEC-Q100 Grade 1.