MPQ4433
36V, 3A, Low Quiescent Current,
Synchronous, Step-Down Converter
AEC-Q100 Qualified
DESCRIPTION
FEATURES
The MPQ4433 is a synchronous, step-down,
Wide 3.3V to 36V Operating Input Range
3A Continuous Output Current
1μA Low Shutdown Mode Current
10μA Sleep Mode Quiescent Current
Internal 90mΩ High-Side and 40mΩ Low-
Side MOSFETs
switching
regulator
with
programmable
frequency (350kHz to 2.5MHz) and integrated,
internal, high-side and low-side power
MOSFETs. The MPQ4433 provides up to 3A of
highly efficient output current with current mode
control for fast loop response.
350kHz to 2.5MHz Programmable Switching
Frequency
The wide 3.3V to 36V input range
Fixed Output Options: 3.3V, 3.8V, 5V
Synchronize to External Clock, Selectable
In-Phase or 180° Out-of-Phase
Power Good Indicator
Programmable Soft-Start Time
80ns Minimum On Time
Selectable Forced CCM or AAM
Low Dropout Mode
Over-Current Protection with Valley-Current
Detection and Hiccup
accommodates
a
variety of step-down
applications in automotive input environments.
The MPQ4433 is ideal for battery-powered
applications due to its extremely low quiescent
current.
The
MPQ4433
employs
advanced
asynchronous mode (AAM) to achieve high
efficiency in light-load condition by scaling down
the switching frequency to reduce switching and
gate driving losses.
Available in a QFN-16 (3mmx4mm)
Package
Available in Wettable Flank
Standard features include soft start, external
clock synchronization, enable control, and
power good indication. High-duty cycle and low
dropout mode are provided for automotive cold-
crank.
Available in AECQ-100 Grade-1
APPLICATIONS
Over-current protection (OCP) with valley-
current detection is employed to prevent the
inductor current from running away. Hiccup
mode reduces the average current greatly in
short-circuit condition. Thermal shutdown
provides reliable and fault-tolerant operation.
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.
The MPQ4433 is available in a QFN-16
(3mmx4mm) package.
MPQ4433 Rev. 1.0
9/19/2016
www.MonolithicPower.com
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