Datasheet MP1542 (Monolithic Power Systems)

MP1542 700KHz/1.3MHz Boost Converter with a 2A Switch The Future of Analog IC Technology DESCRIPTION FEATURES
The MP1542 is a current mode step up • 2A, 0.18Ω, 25V Power MOSFET converter with a 2A, 0.18Ω internal switch to • Uses Tiny Capacitors and Inductors provide a highly efficient regulator with fast • Pin Selectable 700kHz or 1.3MHz Fixed response. The MP1542 can be operated at Switching Frequency 700kHz or 1.3MHz allowing for easy filtering • Programmable Soft-Start and low noise. An external compensation pin • Operates with Input Voltage as Low as 2.5V gives the user flexibility in setting loop dynamics, and Output Voltage as High as 22V which allows the use of small, low-ESR ceramic • 12V at 500mA from 5V Input output capacitors. Soft-start results in small • UVLO, Thermal Shutdown inrush current and can be programmed with an • Internal Current Limit external capacitor. The MP1542 operates from • Available in 8-Pin MSOP Packages an input voltage as low as 2.5V and can generate 12V at up to 500mA from a 5V supply.
APPLICATIONS
The MP1542 includes under-voltage lockout, • LCD Displays current limiting and thermal overload protection • Portable Applications preventing damage in the event of an output • Handheld Computers and PDAs overload. The MP1542 is available in low profile • Digital Still and Video Cameras 8-pin MSOP packages. 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.
TYPICAL APPLICATION Efficiency vs
D1 V
Load Current
IN VOUT 3.3V 8V 95 90 85 6 5 (%) 80 7
IN SW
2
FSEL FB
75 3 OFF ON
EN MP1542
70 8 1
SS COMP GND
65 4 EFFICIENCY C3 60 2.2nF VIN = 3.3V 55 V C4 OUT = 8V 10nF 50 1 10 100 1000 LOAD CURRENT (mA) MP1542 Rev. 1.5 www.MonolithicPower.com
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6/22/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved.