Overview
Design Resources
Technical Forum
Quality

MPQ4313-AEC1

45V, 3A, Low IQ Synchronous Step-Down Converter with Frequency Spread Spectrum, AEC-Q100 Qualified

Active

Datasheet

Description

The MPQ4313 is a frequency-programmable, synchronous, step-down switching regulator with integrated internal high-side and low-side power MOSFET. It provides up to 3A of highly efficient output, with current mode control for fast loop response.

The wide 3.3V to 45V input voltage range accommodates a variety of step-down applications in an automotive input environment. A 1.7μA shutdown mode quiescent current allows the part to be used in battery-powered applications. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency in light-load conditions to reduce the switching and gate driver losses.

An open-drain power good signal indicates whether 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. High-duty cycle and low-dropout mode are provided for automotive cold crank conditions.

The MPQ4313 is available in a QFN-20 (4mmx4mm) package.

Features & Benefits

Wide 3.3V to 45V Operating Range
3A Continuous Output Current
1.7μA Low Shutdown Supply Current
18μA Sleep Mode Quiescent Current
Internal 48mΩ High-Side and 20mΩ Low-Side MOSFETs
350kHz to 530kHz Programmable Switching Frequency for Car Battery Applications
Switching Frequency Can Be Synchronized to External Clock
Out-of-Phase Synchronized Clock Output
3.3V, 5V Fixed Output Options
Frequency Spread Spectrum (FSS) for Low EMI
Symmetric VIN for Low EMI
Power Good Output
External Soft Start
100ns Minimum On Time
Selectable Advanced Asynchronous Mode (AAM) or Forced Continuous Conduction Mode (FCCM)
Low-Dropout Mode
Hiccup Over-Current Protection
Available in a QFN-20 (4mmx4mm) Package
Available in a Wettable Flank Package
Available in AEC-Q100 Grade 1