MPQ4460 Datasheet, PDF (1/18 Pages) Monolithic Power Systems – Industrial Grade, 2.5A, 4MHz, 36V Step-Down Converter

The Future of Analog IC Technology
MPQ4460
Industrial Grade, 2.5A, 4MHz, 36V
Step-Down Converter
DESCRIPTION
The MPQ4460 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 3.8V to 36V input range
accommodates a variety of step-down
applications, including those in an automotive
input environment. A 120µA operational
quiescent 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 MPQ4460 is able to
prevent EMI (Electromagnetic Interference)
noise problems, such as those found in AM
radio and ADSL applications.
The MPQ4460 is available in a small 3mm x
3mm QFN10 package.
TYPICAL APPLICATION
C4
100nF
10
L1
VIN
8,9
VIN
BST
SW ^1,2
10uH
C1
10uF
D1
50V
EN
3
EN
FB ⁵
MPQ4460
7
FREQ
COMP ⁴
GND
6
C3
220pF
C6
NS
FEATURES
• Guaranteed Industrial Temp Range Limits
• 120μA Quiescent Current
• Wide 3.8V to 36V Operating Input Range
• 150mΩ Internal Power MOSFET
• Up to 4MHz Programmable Switching
Frequency
• Ceramic Capacitor Stable
• Internal Soft-Start
• Internally Set Current Limit without a
Current Sensing Resistor
• Up to 95% Efficiency
• Output Adjustable from 0.8V to 30V
• Available in a 3mm x 3mm QFN10 Package
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.
C2
22uF
6.3V
VOUT
3.3V
Efficiency vs
Load Current
100
90
V_IN=5V
80
70
V_IN=12VV_IN=24V
60
50
40
30
0
V_OUT=3.3V
0.5 1.0 1.5 2.0 2.5
LOAD CURRENT (A)
MPQ4460 Rev1.21
www.MonolithicPower.com
1
12/5/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.