Monolithic Power Systems (MPS) MPQ4314 Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MPQ4314 Synchronous Step-Down Converters offer configurable-frequency with integrated internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). The MPQ4314 delivers up to 4A highly efficient output current (IOUT) with current mode control for fast loop response. The devices utilize a wide 3.3V to 45V input voltage (VIN) range to accommodate a variety of step-down applications in automotive input environments. A 1.7μA shutdown mode quiescent current enables the MPQ4314 to be used in battery-powered applications.

The MPS MPQ4314 Synchronous Step-Down Converters supply thermal shutdown for a reliable, fault-tolerant operation and frequency foldback to prevent inductor current runaway during start-up. A high-duty cycle and low-dropout mode are also furnished for automotive cold crank conditions.

The MPQ4314 is housed in a QFN-20 (4mm x 4mm) package.

Features

Wide 3.3V to 45V operating input voltage (V_IN) range
4A Continuous output current (I_OUT)
1.7μA Low shutdown supply current (I_SHDN)
18μA Sleep mode quiescent current (I_Q)
Internal 48mΩ High-Side MOSFET (HSFET) and 20mΩ Low-Side MOSFET (LSFET)
350kHz to 1000kHz Programmable Switching Frequency (f_SW) for car battery applications
Synchronize to an external clock
Out-of-phase synchronized clock output
3.3V Fixed output options
Frequency Spread Spectrum (FSS) for low EMI

Symmetric VIN for low EMI
Power Good (PG) output
External Soft Start (SS)
100ns Minimum on time
Selectable Advanced Asynchronous Modulation (AAM) Mode or Forced Continuous Conduction Mode (FCCM)
Low-dropout mode
Hiccup Over-Current Protection (OCP)
Available in a QFN-20 (4mm x 4mm) package
Available in a wettable flank package
Available in AEC-Q100 Grade 1