MP4570
3A, 4.5V-55V Input, Frequency Programmable,
Fully Integrated Synchronous, Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP4570 is a frequency programmable step-
down switching converter with integrated internal
high-side and low side power MOSFETs. It can
provide 3A continuous output current with peak
current control for excellent transient response
and efficiency performance.
Wide Input Voltage Range: 4.5V to 55V
90mΩ and 70mΩ Internal High and Low
Power MOSFETs
Peak Current Mode Control
Programmable Switching Frequency
Stable Independent on Output Capacitors
Optional External Soft Start
OCP Protection with Valley Current
Detection
Support External SYNC Clock
OVP Protection
Current Limit Decreasing during Output
Short for Better Thermal Performance
Power Good Indication
The wide 4.5V to 55V input voltage range
accommodates
a
variety of step down
applications, including those applications in
industrial, PoE, automotive and printer with DC
high voltage bus.
The MP4570 uses peak current mode control to
regulate the output voltage. The chip provides
over current protection with valley current
detection which is used to avoid current running
way. Also it has accurate and reliable over
voltage protection, and auto recovery thermal
protection. In addition, the optional external soft
start is available. Enable and power good
indication function can be used to power track
easily. In order to increase the efficiency,
MP4570 will automatically scaling down the
switching frequency when load is light.
Meanwhile, the low side MOSFET will be turned
off to reduce driver loss when zero inductor
current is detected. MP4570 also features as a
fully integrated solution with both high side and
low side power MOSFETs. Synchronous
operation mode with integrated low side
MOSFET is much helpful to reduce the
conduction loss and also beneficial to reduce
external components space and save the cost.
Thermal Shutdown Protection
Available in a TSSOP-20 EP Package.
APPLICATIONS
PoE Input Non-isolated Buck
Industrial Power Systems
Printers and Scanners
Automotive Power Systems
Distributed Power Systems
All MPS parts are lead-free, halogen free, and adhere to the RoHS
directive. For MPS green status, please visit MPS website under Quality
Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered
Trademarks of Monolithic Power Systems, Inc.
The MP4570 is available in a TSSOP-20 EP with
exposed pad package.
MP4570 Rev. 1.01
1/4/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
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