MP2565 Datasheet, PDF (1/20 Pages) Monolithic Power Systems – 2.5A, 4MHz, 50V Step-Down Converter

The Future of Analog IC Technology
DESCRIPTION
The MP2565 is a high frequency step-down
switching regulator with an integrated internal
high-side high voltage power MOSFET. It
provides 2.5A output with current mode control for
fast loop response and easy compensation.
The wide 4.5V to 50V input range accommodates
a variety of step-down applications, including
those in an 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 4MHz, the MP2565 is able to
prevent EMI (Electromagnetic Interference) noise
problems, such as those found in AM radio and
ADSL applications.
The MP2565 is available in small 3mm x 3mm
QFN10 and thermally enhanced SOIC8
packages.
MP2565
2.5A, 4MHz, 50V
Step-Down Converter
FEATURES
• 120µA Quiescent Current
• Wide 4.5V to 50V Operating Input Range
• 220mΩ Internal Power MOSFET
• Up to 4MHz Programmable Switching
Frequency
• High-Efficiency, Light-Load operation
• Stable with Ceramic Capacitor
• Internal Soft-Start
• Internally Set Current Limit without external
Current Sensing Resistor
• Up to 95% Efficiency
• Output Adjustable from 0.8V to 47V
• Available in 3x3 QFN10 and Thermally
Enhanced SOIC8 Packages
APPLICATIONS
• High Voltage Power Conversion
• Automotive Systems
• Industrial Power Systems
• Distributed Power Systems
• Battery Powered Systems
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
C4
100nF
10
L1
VIN
8,9
VIN
BST
SW ^1,2
C1
10uF R5
D1
C2
22uF
EN
R6
3
EN
FB ⁵
MP2565
R2
R1
7
FREQ
R4
COMP ⁴
GND
6
C3
220pF
R3
C6
NS
VOUT
3.3V
Efficiency @V_OUT=3.3V
fs=500kHz
100
V_IN=8V
V_IN=12V
90
80
70
V_IN=36V ^VIN=24V
60 _VIN=50V
50
40
0 0.5
1 1.5
I_OUT (A)
2 2.5
MP2565 Rev. 0.91
www.MonolithicPower.com
1
4/19/2011
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