MP2370 Datasheet, PDF (1/8 Pages) Monolithic Power Systems – 1.2A, 24V, 1.4MHz Step-Down White LED Driver in a TSOT23-6

The Future of Analog IC Technology
DESCRIPTION
The MP2370 is a monolithic step-down white
LED driver with a built-in power MOSFET. It
achieves 1.2A peak output current over a wide
input supply range with excellent load and line
regulation. Current mode operation provides
fast transient response and eases loop
stabilization. Fault condition protection includes
cycle-by-cycle current limiting and thermal
shutdown.
The MP2370 requires a minimum number of
readily available standard external components.
The MP2370 is available in a TSOT23-6 package.
MP2370
1.2A, 24V, 1.4MHz Step-Down
White LED Driver in a TSOT23-6
FEATURES
• 1.2A Peak Output Current
• 0.35Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Also Work with Cap-less Configuration
• Up to 87% Efficiency
• 0.1μA Shutdown Mode
• Fixed 1.4MHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.5V to 24V Operating Input Range
• 0.15V Sense Voltage
• Available in a TSOT23-6 Package
APPLICATIONS
• WLED Drivers
• Distributed Power Systems
• Battery Charger
• Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
OFF ON
5
IN
1
BST
6
SW
4
EN
GND
2
3
FB
Efficiency vs
Output Current
Circuit as Figure 1
100
90
VIN=8V
VIN=12V
80
VIN=20V
70
60
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT CURRENT (A)
MP2370 Rev. 0.96
www.MonolithicPower.com
1
9/21/2007
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