MPQ4316-AEC1

45V, 6A, Low I_Q, Synchronous Step-Down Converter with Frequency Spread Spectrum, AEC-Q100 Qualified

Description

The MPQ4316 is a configurable-frequency, synchronous, step-down switching converter with integrated internal high-side and low-side power MOSFETs. The device provides up to 6A of highly efficient output current (I_OUT) with current mode control for fast loop response. The wide 3.3V to 45V input voltage (V_IN) range accommodates a variety of step-down applications in automotive input environments. A 1.7μA shutdown mode quiescent current (I_Q) allows the device to be used in battery-powered applications.

The device achieves high power conversion efficiency across the wide load range 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 when the output is within 95% to 105% of its nominal voltage.

Frequency foldback helps prevent inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. The device provides a high duty cycle and low-dropout mode for automotive cold-crank conditions. The MPQ4316 is available in a QFN-20 (4mmx4mm) package.

Features & Benefits

Wide 3.3V to 45V Operating Input Voltage (V_IN) Range
6A of Continuous Output Current (I_OUT)
1.7μA Low Shutdown Supply Current
18μA Sleep Mode Quiescent Current (I_Q)
Internal 48mΩ High-Side MOSFET and 20mΩ Low-Side MOSFET
350kHz to 1000kHz Configurable Switching Frequency (f_SW) for Car Battery Applications
Can Be Synchronized to an External Clock
Out-of-Phase Synchronized Clock Output
Fixed Output Options: 3.3V, 5V
Frequency Spread Spectrum (FSS) for Low EMI
Symmetric V_IN 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 (4mmx4mm) Package
Available in a Wettable Flank Package
Available in AEC-Q100 Grade 1