MPQ4314-AEC1

45V, 4A, Low I_Q, Synchronous Step-Down Converter with Frequency Spread Spectrum, AEC-Q100 Qualified

Description

The MPQ4314 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 can provide up to 4A 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. The 1.7μA shutdown current 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 is within 95% to 105% of its nominal voltage.

Frequency foldback prevents inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. A high duty cycle and low-dropout (LDO) mode are provided for automotive cold crank conditions. The MPQ4314 is available in a QFN-20 (4mmx4mm) package.

Features & Benefits

Wide 3.3V to 45V Operating Input Voltage (V_IN) Range
4A Continuous Output Current (I_OUT)
7μA Low Shutdown Current
18μA Sleep Mode Quiescent Current (I_Q)
Internal 48mΩ High-Side MOSFET (HS-FET) and 20mΩ Low-Side MOSFET (LS-FET)
350kHz to 1000kHz Configurable Switching Frequency (f_SW) for Car Battery Applications
Synchronize to External Clock
Out-of-Phase Synchronized Clock Output
3V Fixed Output
Frequency Spread Spectrum (FSS) for EMI Reduction
Symmetric VIN for EMI Reduction
Power Good (PG) Output
External Soft Start (SS)
100ns Minimum On Time (t_{ON_MIN})
Selectable Advanced Asynchronous Modulation (AAM) Mode or Forced Continuous Conduction Mode (FCCM)
Low-Dropout (LDO) Mode
Over-Current Protection (OCP) with Hiccup Mode
Available in a QFN-20 (4mmx4mm) Package