MP3418 Datasheet, PDF (1/14 Pages) Monolithic Power Systems – 400mA, 1.2MHz, Synchronous, Step-up Converter with Output Disconnect

The Future of Analog IC Technology
MP3418
400mA, 1.2MHz, Synchronous, Step-up
Converter with Output Disconnect
DESCRIPTION
The MP3418 is a high-efficiency, synchronous,
current–mode, step-up converter with output
disconnect.
The MP3418 can start up from an input voltage
as low as 0.8V to provide inrush current limiting,
and output short-circuit protection. The
integrated, P-channel, synchronous rectifier
improves efficiency and eliminates the need for
an external Schottky diode. The PMOS
disconnects the output from the input when the
part shuts down. This output disconnect feature
allows the output to be completely discharged,
thus allowing the part to draw less than 1µA in
shutdown mode.
The 1.2MHz switching frequency allows for
smaller external components, while the internal
compensation and the soft-start minimize the
external component count: these feature help to
produce a compact solution for a wide current
load range.
The MP3418 is available in a small 8-pin
TSOT23 package.
TYPICAL APPLICATION CIRCUIT
FEATURES
• Up to 96% Efficiency
• 0.8V Low Voltage Start-Up
• 0.6V-to-4V Input Range
• 1.8V-to-4V Output Range
• Internal Synchronous Rectifier
• 1.2MHz Fixed-Frequency Switching
• Typical 38µA Quiescent Current
• Typical 0.1µA Shutdown Current
• Current-Mode Control with Internal
Compensation
• True Output Disconnect from Input
• V_IN>V_OUT Down Mode Operation
• High Efficiency under Light-Load Conditions
• Very Small External Components
• Inrush Current Limiting and Internal Soft-
Start
• Over-Voltage Protection
• Short-Circuit Protection
• TSOT23-8 Package
APPLICATIONS
• Battery-Powered Products
• Personal Medical Devices
• Portable Media Players
• Wireless Peripherals
• Handheld Computers and Smartphones
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.
MP3418 Rev 1.0
www.MonolithicPower.com
1
2/7/2013
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