The MPQ4312 is a configurable-frequency, synchronous step-down switching converter with integrated, internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). It provides up to 2A of highly efficient output current (IOUT) with current mode control for fast loop response.
The wide 3.3V to 45V input voltage (VIN) range accommodates a variety of step-down applications in automotive input environments. A 1.7μA shutdown mode quiescent current (IQ) 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 (fSW) under light-load conditions to reduce the switching and gate driver losses. An open-drain power good (PG) signal indicates whether the output is within 95% to 105% of its nominal voltage. Frequency foldback helps prevent inductor current (IL) runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. High duty cycle and low-dropout mode are provided for automotive cold-crank conditions.
The MPQ4312 is available in a QFN-20 (4mmx4mm) package.