MPQ4559 Datasheet, PDF (1/19 Pages) Monolithic Power Systems – Industrial Grade, 1.5A, 2MHz, 55V Step-Down Converter AEC-Q100 Qualified

DESCRIPTION
The MPQ4559 is a high frequency step-down
switching regulator with integrated internal high-
side high voltage power MOSFET. It provides
1.5A output with current mode control for fast loop
response and easy compensation.
The wide 3.8V to 55V input range accommodates
a variety of step-down applications, including
those in automotive input environment. A 12µA
shutdown mode supply current allows use in
battery-powered applications.
High power conversion efficiency over a wide
load range is achieved by scaling down the
switching frequency at light load condition to
reduce the switching and gate driving losses.
The frequency foldback helps prevent inductor
current runaway during startup and thermal
shutdown provides reliable, fault tolerant
operation.
By switching at 2MHz, the MPQ4559 is able to
prevent EMI (Electromagnetic Interference) noise
problems, such as those found in AM radio and
ADSL applications.
The MPQ4559 is available in small 3mm x 3mm
QFN10 and SOIC8 with exposed pad packages..
TYPICAL APPLICATION
MPQ4559
Industrial Grade, 1.5A, 2MHz, 55V
Step-Down Converter
AEC-Q100 Qualified
FEATURES
 Guaranteed Industrial Temp Range Limits
 Wide 3.8V to 55V Operating Input Range
 250mΩ Internal Power MOSFET
 Up to 2MHz Programmable Switching
Frequency
 140μA Quiescent Current
 Ceramic Capacitor Stable
 Internal Soft-Start
 Up to 95% Efficiency
 Output Adjustable from 0.8V to 52V
 Available in QFN (3mm x 3mm) and
SOIC8E with Exposed Pad Packages
 AEC-Q100 Qualified
APPLICATIONS
 High Voltage Power Conversion
 Automotive Systems
 Industrial Power Systems
 Distributed Power Systems
 Battery Powered Systems
All MPS parts are lead-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.
MPQ4559 Rev. 1.01
www.MonolithicPower.com
1
6/9/2013
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