MP28275EL-LF-P

MP28275 7V, 5A, 1.1MHz Synchronous Step-down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP28275 is a high frequency synchronous 4.5V to 7V Operating Input Range rectified step-down switch mode converter with 5A Output Current built-in internal power MOSFETs. It offers a Low R (ON) Internal Power MOSFETs DS very compact solution to achieve 5A continuous Proprietary Switching Loss Reduction output current with excellent load and line Technique regulation. The MP28275 operates at high Fixed 1.1MHz Switching Frequency efficiency over a wide output current load range. Sync from 300kHz to 2MHz External Clock Internal Compensation Current mode operation provides fast transient response and eases loop stabilization. Thermal Shutdown Over-Current-Protection and Hiccup Full protection features include OCP and thermal Output Adjustable from 0.8V shut down. Available in 3x4mm QFN14 Package The MP28275 requires a minimum number of APPLICATIONS readily available standard external components and is available in a space saving 3mm x 4mm Notebook Systems and I/O Power 14-pin QFN package. Networking Systems Digital Set Top Boxes Personal Video Recorders Flat Panel Television and Monitors Distributed Power Systems MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. The information in this datasheet about the product and its associated technologies are proprietary and intellectual property of Monolithic Power Systems and are protected by copyright and pending patent applications. TYPICAL APPLICATION FOR NOTEBOOK Efficiency V =1.2V OUT 1 6 100 IN BST V =5V 90 IN C4 C1 22uF 0.1uF 80 L1 1.2uH 70 V =7V 2, 3 IN VOUT SW 11 4, 5 1.2V 5A VCC 60 C3 MP28275 R1 R3 0.1uF 100K 5K 50 C2 8 40 47uF FB 9 Rt PG PG 30 25K R2 10K 7 20 EN/SYNC EN GND 10 12, 13, 14 0 012345 OUTPUT CURRENT (A) MP28275 Rev. 1.0 www.MonolithicPower.com 1 5/29/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. EFFICIENCY (%)MP28275 5A, 7V, SYNCHRONOUS STEP-DOWN CONVERTER WITH INTERNAL MOSFETS ORDERING INFORMATION Part Number* Package Top Marking Free Air Temperature (T ) A MP28275EL 3x4 QFN14 MP28275 -20 C to +85C * For Tape & Reel, add suffix Z (e.g.MP28275ELZ). For RoHS compliant packaging, add suffix LF (e.g.MP28275ELLFZ) PACKAGE REFERENCE TOP VIEW PIN 1 ID IN GND SW GND SW GND SW VCC SW NC BST PG EN/SYNC FB EXPOSED PAD ON BACKSIDE (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage V ......................................... 9V IN 3x4 QFN14 ............................. 48...... 11... C/W V ..........................-0.3V (-5V for<10ns) to 10V SW Notes: V ....................................................... V + 6V BS SW 1) Exceeding these ratings may damage the device. All Other Pins..................................-0.3V to +6V 2) The maximum allowable power dissipation is a function of the maximum junction temperature T(MAX), the junction-to- J Operating Temperature.............. -20C to +85 C ambient thermal resistance , and the ambient temperature (2) JA Continuous Power Dissipation (T = +25C) A T . The maximum allowable continuous power dissipation at A ......2.6W any ambient temperature is calculated by P (MAX)=(T (MAX)- D J T )/ . Exceeding the maximum allowable power dissipation A JA Junction Temperature...............................150C will cause excessive die temperature, and the regulator will go Lead Temperature ....................................260C into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. Storage Temperature............... -65C to +150 C 3) The device is not guaranteed to function outside of its (3) operating conditions. Recommended Operating Conditions 4) Measured on JESD51-7, 4-layer PCB. Supply Voltage V .............................4.5V to 7V IN Operating Junct. Temp (T )...... -20 C to +125 C J MP28275 Rev. 1.0 www.MonolithicPower.com 2 5/29/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved.