MP9181
High Efficiency, Fast Transient, 3A, 4.5V-20V Input
Synchronous Step-down Converter
in a Tiny 2mmx3mm QFN12 Package
MP9181 Rev 1.01 www.MonolithicPower.com 1
12/10/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP9181 is a fully-integrated, high-
efficiency, synchronous, step-down, switch
mode converter. It offers a very compact
solution that can achieve 3A continuous output
current over a wide input supply range with
excellent load and line regulation. This device
operates with high efficiency over a wide
output-current load range.
Constant-On-Time (COT) control mode
provides fast transient response and eases loop
stabilization.
Full protection features include SCP, OCP,
UVP, and thermal shut down.
The MP9181 requires a minimal number of
readily-available standard external components.
This device is available in a space-saving
2mmx3mm 12-pin QFN package.
FEATURES
• Compatible with Intel Thunderbolt Specs
• Wide 4.5V to 20V Operating Input Range
• 3A Output Current
• +/-1% V
FB
Voltage Tolerance
• Low R
DS
(ON) Internal Power MOSFETs
• Proprietary Switching Loss Reduction
Technique
• Up to 95% Peak Efficiency
• High Light Load Efficiency
• Soft Start-up/Shutdown
• Programmable Switching Frequency
• SCP, OCP, UVP Protection and Thermal
Shutdown
• Hiccup Mode during OCP
• Power Good Indicator
• Ultra-small (2mmx3mm)
QFN
Package
APPLICATIONS
• Networking/Communication Systems
• System I/O Power
• Distributed Power Systems
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 Monolithi
Power Systems, Inc.
TYPICAL APPLICATION
