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