MPQ9843
36V, 3A, Low IQ,
Step-Down Converter
AEC-Q100 Qualified
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The
MPQ9843
is
a
high-frequency,
2μA Low Shutdown Supply Current
synchronous, rectified, step-down, switch-mode
converter with built-in power MOSFETs. It
offers a very compact solution that achieves 3A
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 provides
high efficiency over the output current load
range, allowing the MPQ9843 to be used in a
variety of step-down applications in automotive
input environments and battery-powered
applications.
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
Package
a
QFN-16 (3mmx4mm)
APPLICATIONS
Peak-current-mode operation provides fast
transient response and eases loop stabilization.
The excellent low dropout performance allows
the MPQ9843 to be used in high duty cycle
applications.
Automotive Systems
Industrial Power Systems
All MPS parts are lead-free, halogen-free, and adhere to the RoHS
directive. For MPS green status, please visit the MPS website under
Quality Assurance. “MPS” and “The Future of Analog IC Technology” are
registered trademarks of Monolithic Power Systems, Inc.
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 MPQ9843 is available in a space-saving
QFN-16 (3mmx4mm) package.
TYPICAL APPLICATION
100
90
80
70
60
50
40
10
100
1000
10000
Output Adjustable Version
Output Fixed Version
MPQ9843 Rev. 1.02
5/10/2019
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2019 MPS. All Rights Reserved.
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