MPQ2451 Datasheet, PDF (1/16 Pages) Monolithic Power Systems – Industrial/Automotive-Grade 36V, 2MHz, 0.6A Step-Down Converter AEC-Q100 Qualified

The Future of Analog IC Technology
MPQ2451
Industrial/Automotive-Grade
36V, 2MHz, 0.6A Step-Down Converter
AEC-Q100 Qualified
DESCRIPTION
The MPQ2451 is a high frequency, step-down,
switching regulator with an integrated high-
voltage high-side power MOSFET. It efficiently
provides up to a 0.6A output with current-mode
control for fast loop response.
The wide 3.3V-to-36V input range accommodates
a variety of automotive step-down applications,
and the 3μA shutdown-mode quiescent current
allows use in battery-powered applications.
The MPQ2451 achieves high power-conversion
efficiency over a wide load range by scaling
down the switching frequency under light-load
condition to reduce the switching and gate
driving losses.
Frequency fold-back prevents inductor current
runaway during start-up. Thermal shutdown
provides reliable, fault-tolerant operation.
The MPQ2451 is available in a cost-effective
SOT23-6L and QFN-6L packages.
FEATURES
• Guaranteed Industrial/Automotive Temp.
Range Limits
• 130μA Operating Quiescent Current
• Wide 3.3V-to-36V Operating Input Range
• 500mΩ Internal Power MOSFET
• 2MHz Fixed Switching Frequency
• Internally Compensated
• Stable with Ceramic Output Capacitors
• Internal Soft-Start
• Precision Current Limit Without Current
Sensing Resistor
• >90% Efficiency
• Output Adjustable from 0.8V to 0.9·V_IN
• 6-Lead SOT23 and QFN Packages
• Available in AEC-Q100 Grade 1
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.
TYPICAL APPLICATION
C3
33pF
1 _BST
6
SW
MPQ2451
GND
5
VIN
C4
L1
100nF
D1
VIN
C1
3 _FB
4
EN
Control
VOUT
5V/0.6A
Efficiency
VOUT=5V
95
VIN=8V
90
85
VIN=12V
80
VIN=24V
75
70
VIN=36V
65
60
55
50
0
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT(A)
MPQ2451 Rev 1.02
www.MonolithicPower.com
1
5/3/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
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