MP3412 Datasheet, PDF (1/12 Pages) Monolithic Power Systems – 1.1A, 1MHz Synchronous Boost WLED Driver with Output Disconnect

The Future of Analog IC Technology
DESCRIPTION
The MP3412 is a synchronous, fixed frequency,
high efficiency step-up WLED driver with true
output load disconnect function in a low profile
6-lead Thin-SOT23 package.
The MP3412 can startup from an input voltage as
low as 0.8V and provides in-rush current limiting
as well as output short circuit protection. The
open load protection is also integrated
A switching frequency of 1MHz minimizes overall
solution footprint by allowing the use of tiny, low
profile inductors and ceramic capacitors. Current
mode PWM control with internal compensation
reduces external parts, thereby saving critical
board space.
The device also features low shutdown current of
under 1µA. The true output disconnect feature
allows the output to be completely discharged in
shutdown. It also limits the inrush of current
during start-up, minimizing surge current seen by
the input supply.
The MP3412 is available in 6-pin thin SOT23
package.
MP3412
1.1A, 1MHz Synchronous Boost
WLED Driver with Output Disconnect
FEATURES
• Input Range: 0.8V to 4.4V
• Output Range: 2.5V to 5.0V
• 0.8V Low Start-Up Voltage
• Internal Power MOSFET and Synchronous
Rectifier
• 1MHz Fixed Switching Frequency
• Current Mode Control with Internal
Compensation
• Up to 96% Efficiency
• <1µA Shutdown Current
• Tiny External Components
• True Output Load Disconnect
• Inrush Current Limiting and Internal Soft-
Start
• Open-Load Protection
• Short-Circuit Protection
• Available in TSOT23-6 Package
APPLICATION
• General LED Illuminations
• Cellular Phones
• Digital Cameras
• Handheld Instruments
• Wireless Handsets
• GPS Receivers
“Monolithic Power Systems”, “MPS”, and “The Future of Analog IC
Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
Efficiency
100
95
90 ^{Boost Mode}
85
80
75
Io=200mA
70
Io=80mA
65
60
55
50
0123
V_IN(V)
LDO Mode
45
MP3412 Rev. 0.9
www.MonolithicPower.com
1
1/19/2010
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