MP2451DT-LF-P Datasheet, PDF (1/15 Pages) MPS Industries, Inc. – 36V, 2MHz, 0.6A Step-Down Converter

The Future of Analog IC Technology
MP2451
36V, 2MHz, 0.6A
Step-Down Converter
DESCRIPTION
The MP2451 is a high frequency (2MHz) step-
down switching regulator with integrated
internal high-side high voltage power MOSFET.
It provides single 0.6A (or less) highly efficient
output with current mode control for fast loop
response.
The wide 3.3V to 36V input range
accommodates a variety of step-down
applications in automotive input environment. A
3μA shutdown mode 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.
Frequency fold-back helps prevent inductor
current runaway during start-up. Thermal
shutdown provides reliable, fault-tolerant
operation.
The MP2451 is available in the cost-effective
SOT23-6 and TSOT23-6 packages.
FEATURES
• 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 0.8xV_IN
• 3μA Low Shutdown Supply Current
• SOT23-6 and TSOT23-6 Packages
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
MP2451
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)
MP2451 Rev. 1.33
www.MonolithicPower.com
1
4/29/2014
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