MP2380DN-LF-Z

MP8726 21V, 6A Peak Current, 500kHz Synchronous Step-down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP8726 is a high frequency synchronous rectified step-down switch mode converter with built in internal power MOSFETs. It offers a very compact solution to achieve 6A peak output current over a wide input supply range with excellent load and line regulation. The MP8726 operates at high efficiency over a wide 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 MP8726 requires a minimum number of readily available standard external components and is available in a space saving 3mm x 4mm 14-pin QFN package. • • • • • • Wide 4.5V to 21V Operating Input Range 6A Peak Output Current Low RDS(ON) Internal Power MOSFETs Proprietary Switching Loss Reduction Technique Fixed 500kHz Switching Frequency Sync from 300kHz to 2MHz External Clock Internal Compensation OCP Protection and Thermal Shutdown Output Adjustable from 0.8V Available in 14-pin QFN3x4 Package APPLICATIONS • • • • • • Notebook Systems and I/O Power 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. TYPICAL APPLICATION （FOR NOTEBOOK） Efficiency VOUT=1.2V 100 V IN=12V 90 EFFICIENCY (%) 80 70 60 V IN=5V V IN=21V 50 40 30 20 10 0 0 1 2 3 4 5 6 OUTPUT CURRENT (A) MP8726 Rev. 0.92 6/15/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 1 MP8726 – 6A PEAK CURRENT, 21V, SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* MP8726EL Package 3x4 QFN14 Top Marking 8726 Free Air Temperature (TA) -20°C to +85°C * For Tape & Reel, add suffix –Z (e.g. MP8726EL–Z). For RoHS compliant packaging, add suffix –LF (e.g. MP8726EL–LF–Z) PACKAGE REFERENCE TOP VIEW PIN 1 ID IN 1 14 AGND SW 2 13 GND SW 3 12 GND SW 4 11 VCC SW 5 10 NC BST 6 9 PG EN/SYNC 7 8 FB EXPOSED PAD ON BACKSIDE ABSOLUTE MAXIMUM RATINGS (1) Supply Voltage VIN ....................................... 22V VSW ..........................-0.3V (-5V for65% VIN In this case, an external BST diode is recommended from the VCC pin to BST pin, as shown in Figure 8 Figure 8—Add Optional External Bootstrap Diode to Enhance Efficiency The recommended external BST diode is IN4148, and the BST cap is 0.1~1µF. MP8726 Rev. 0.92 6/15/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 13 MP8726 – 6A PEAK CURRENT, 21V, SYNCHRONOUS STEP-DOWN CONVERTER PACKAGE INFORMATION 3mm x 4mm QFN14 2.90 3.10 1.60 1.80 0.30 0.50 PIN 1 ID MARKING PIN 1 ID SEE DETAIL A 1 14 0.18 0.30 3.20 3.40 3.90 4.10 PIN 1 ID INDEX AREA 0.50 BSC 8 TOP VIEW 7 BOTTOM VIEW 0.80 1.00 0.20 REF PIN 1 ID OPTION A 0.30x45º TYP. PIN 1 ID OPTION B R0.20 TYP. 0.00 0.05 SIDE VIEW DETAIL A 2.90 0.70 NOTE: 1.70 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH. 3) LEAD COPLANARITY SHALL BE0.10 MILLIMETER MAX. 4) JEDEC REFERENCE IS MO-229, VARIATION VGED-3. 5) DRAWING IS NOT TO SCALE. 0.25 3.30 0.50 RECOMMENDED LAND PATTERN NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP8726 Rev. 0.92 6/15/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 14