DESCRIPTION
The MPQ9842 is a high-frequency,
synchronous, rectified, step-down, switch-mode
converter with built-in power MOSFETs. It
offers a very compact solution that achieves 2A
of continuous output current with excellent load
and line regulation over a wide 3.3V to 36V
input supply range. The switching frequency is
programmable or can be synchronized to an
external clock in the range of 350kHz to
2.5MHz. Synchronous operation and ultra-low
14μA sleep mode quiescent current provide
high efficiency over the output current load
range, allowing the MPQ9842 to be used in a
variety of step-down applications in automotive
input environments and battery-powered
applications.
Peak-current-mode operation provides fast
transient response and eases loop stabilization.
The excellent low dropout performance allows
the MPQ9842 to be used in high duty cycle
applications.
Full protection features include over-current
protection (OCP), short-circuit protection (SCP),
and thermal shutdown. An open-drain power
good (PG) signal indicates when the output is
within 10% of its nominal voltage.
The MPQ9842 is available in a space-saving
QFN-16 (3mmx4mm) package.

FEATURES
• 2μA Low Shutdown Supply Current
• 14μA No-Load Quiescent Current
• Internal 125mΩ High-Side and 55mΩ Low-
Side MOSFET
• 350kHz to 2.5MHz Programmable Switching
Frequency
• Power Good (PG) Output
• External Soft Start (SS)
• 80ns Minimum On Time
• Selectable Forced CCM and AAM
• Hiccup Over-Current Protection (OCP)
• AEC-Q100 Grade-1
• Available in a QFN-16 (3mmx4mm)
Package

APPLICATIONS
• Automotive Systems
• Industrial Power Systems