MP4571
High-Efficiency, 1A, 60V, Fully Integrated
Synchronous Buck Converter
DESCRIPTION
FEATURES
The MP4571 is a fully integrated, fixed-
frequency, synchronous step-down converter. It
can achieve up to 1A of continuous output
current with peak current control for excellent
transient response.
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Wide 4.5V to 60V Operating Input Range
1A Continuous Output Current
High-Efficiency Synchronous Mode Control
250mΩ/45mΩ Internal Power MOSFETs
Configurable Frequency Up to 2.2MHz
180° Out-of-Phase SYNCO Clock
40μA Quiescent Current
Low Shutdown Mode Current: 2μA
FB Tolerance: 1% at Room Temp, 2% at
Full Temp
The wide 4.5V to 60V input voltage range
accommodates
a
variety of step-down
applications in an automotive input environment.
A 2μA shutdown mode quiescent current makes
it ideal for battery-powered applications.
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Selectable AAM or Forced CCM Operation
at Light Load
Internal 0.45ms Soft Start
Remote EN Control
Power Good (PG) Indicator
The MP4571 integrates internal high-side and
low-side power MOSFETs for high efficiency
without an external Schottky diode, and is
available in a 12-pin QFN package.
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The MP4571 employs advanced asynchronous
modulation (AAM), which achieves high efficiency
during light load by scaling down the frequency to
reduce the switching and gate driver losses.
Low-Dropout Mode
Over-Current Protection (OCP)
Short-Circuit Protection with Hiccup Mode
VIN Under-Voltage Lockout (UVLO)
Thermal Shutdown
Available in a QFN-12 (2.5mmx3mm)
Package
The MP4571 offers standard features including
built-in soft start, enable control, and a power
good indicator. High duty cycle and low-dropout
mode are provided for automotive cold crank
conditions. In addition, the chip provides over-
current protection with valley current detection,
which helps prevent current runaway. It also has
hiccup short-circuit protection (SCP), input under-
voltage lockout (UVLO), and auto-recovery
thermal protection.
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Available in a Wettable Flank Package
APPLICATIONS
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Automotive Infotainment
Automotive Lamps and LEDs
Automotive Motor Control
Industrial Power Systems
With internal compensation, the MP4571 offers
a very compact solution with a minimum number
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”, the MPS logo, and “Simple, Easy Solutions” are
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
of
readily
available,
standard
external
components. It is available in a QFN-12
(2.5mmx3mm) package.
MP4571 Rev. 1.1
2/22/2023
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2023 MPS. All Rights Reserved.
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