DESCRIPTION

The MPQ4436/4436A is a frequency

programmable, synchronous, step-down

switching regulator with integrated internal highside and low-side power MOSFETs. It provides

6A (or less) of highly efficient output, with current

mode control for fast loop response.

The wide 3.3V to 45V input 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 driving losses.

An open-drain power good signal indicates that

the output is within 93% to 106% 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 the automotive cold crank condition.

The MPQ4436/4436A is available in a QFN-20

(4mmx4mm) package.

FEATURES

• Wide 3.3V to 45V Operating Voltage Range

• 6A Continuous Output Current

• 1.7μA Low Shutdown Supply Current

• 18μA Sleep Mode Quiescent Current

• Internal 48mΩ High-Side and 20mΩ LowSide MOSFET

• 350kHz to 1000kHz Programmable

Switching Frequency for Car Battery

Applications

• Synchronize to External Clock

• Multi-Phase Capability

• Out-of-Phase Synchronized Clock Output

• Frequency Spread Spectrum (FSS) Option

for Low EMI

MPQ4436: Non-FSS version

MPQ4436A: FSS version

• 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

APPLICATIONS

• Automotive Infotainment

• Automotive Clusters

• Advanced Driver Assistance Systems

• Industrial Power Systems