MP2459 Datasheet, PDF (1/13 Pages) Monolithic Power Systems – 0.5A, 55V, 480kHz Step-Down Converter in a TSOT23-6

The Future of Analog IC Technology
DESCRIPTION
The MP2459 is a monolithic, step-down, switch-
mode converter with a built-in power MOSFET.
It achieves a 0.5A peak-output current over a
wide input supply range with excellent load and
line regulation. Current-mode operation
provides a fast transient response and eases
loop stabilization. Fault condition protections
include cycle-by-cycle current limiting and thermal
shutdown.
The MP2459 requires a minimal number of
readily-available external components. The
MP2459 is available in a TSOT23-6 package.
MP2459
0.5A, 55V, 480kHz
Step-Down Converter in a TSOT23-6
FEATURES
• 0.5A Peak Output Current
• 1Ω Internal Power MOSFET
• Stable with Low-ESR Ceramic Output
Capacitors
• Up to 90% Efficiency
• 0.1µA Shutdown Mode
• Fixed 480kHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over-Current Protection
• Wide 4.5V-to-55V Operating Input Range
• Output Adjustable from 0.81V to 0.95*V_IN
• Available in a TSOT23-6 Package
APPLICATIONS
• Power Meters
• Distributed Power Systems
• Battery Chargers
• Pre-Regulator for Linear Regulators
• WLED Drivers
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
GND
EN
BS T
IN
MP2459
U1
SW
EN
FB
L1
D1
VOU T
GND
100
90
80
70
60
50
40
30
0.0 0.1 0.2 0.3 0.4 0.5 0.6
MP2459 Rev. 1.0
www.MonolithicPower.com
1
3/4/2013
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