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MP28256EL Datasheet(PDF) 1 Page - Monolithic Power Systems |
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MP28256EL Datasheet(HTML) 1 Page - Monolithic Power Systems |
1 / 13 page MP28256 21V, 3A 500kHz Synchronous Step-Down Coverter MP28256 Rev. 1.0 www.MonolithicPower.com 1 11/3/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. The Future of Analog IC Technology DESCRIPTION The MP28256 is a synchronous rectified step- down switch mode converter with built in internal power MOSFETs. It offers a very compact solution to achieve 3A continuous output current over a wide input supply range with excellent load and line regulation. The MP28256 has synchronous mode operation for higher efficiency over output current load range. Current mode operation provides fast transient response and eases loop stabilization. Full protection features include OCP and thermal shut down. The MP28256 requires a minimum number of readily available standard external components and is available in a space saving QFN14 (3x4mm) package. FEATURES Wide 4.5V to 21V Operating Input Range 0.6V internal reference with 2% accuracy 3A Output Current Low Rds(ON) Internal Power MOSFETs Fixed 500kHz Switching Frequency Frequency SYNC from 300kHz to 2MHz External Clock External Soft Start OCP and Thermal Shutdown Separate EN and SYNC pins Available in a QFN14 (3x4mm) Package. APPLICATIONS DSL Modems Cable Modems Set Top Boxes 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. Load Current VOUT=1.2V LOAD CURRENT (A) 0 10 20 30 40 50 60 70 80 90 100 00.5 11.5 22.5 33.5 V IN=21V V IN=12V V IN=4.5V |
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