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MP2490 fiches techniques PDF

MPS - 700KHz Step-Down Converter

Numéro de référence MP2490
Description 700KHz Step-Down Converter
Fabricant MPS 
Logo MPS 





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MP2490 fiche technique
The Future of Analog IC Technology
MP2490
1.5A, 36V, 700KHz Step-Down Converter
with Programmable Output Current Limit
DESCRIPTION
The MP2490 is a monolithic step-down switch
mode converter with a programmable output
current limit. It achieves 1.5A continuous output
current over a wide input supply range with
excellent load and line regulation.
The maximum output current can be
programmed by sensing current through the
inductor DC resistance (DCR) or an accurate
sense resistor.
Fault condition protection includes cycle-by-cycle
current limiting and thermal shutdown.
The MP2490 requires a minimum number of
readily available standard external components.
The MP2490 is available in QFN10 (3mm x 3mm),
8-pin SOIC and PDIP packages.
FEATURES
Wide 4.5V to 36V Operating Input Range
Programmable up to 1.5A Output Current
Output Adjustable from 0.8V to 15V
Programmable Output Current Limit without
power loss
0.25Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
95% Efficiency @ 500mA (Vo=5V)
Fixed 700kHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Available in QFN10 (3mm x 3mm), 8-Pin
SOIC and PDIP Packages
APPLICATIONS
USB Power Supplies
Automotive Cigarette Lighter Adapters
Power Supply for Linear Chargers
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
VIN
4.5V - 36V
EN
8
PGOOD
1 VIN
9
BST
ISN 6
ISP 7
MP2490
C9
10nF
R5 3 EN
SW 10
D1
5 SS
GND
2
FB 4
C6
10nF
L1
PGOOD
R8 V-PULL-UP
5V VOUT
GND
Efficiency vs.
Load Current
100
VIN=8V
90
80 VIN=12V
70
60
50
10
VIN=24V
VOUT=5V
100 1000
LOAD CURRENT (mA)
10000
MP2490 Rev. 1.0
4/9/2014
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
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