1、 MP2482 5A, 30V, 420kHz Step-Down Converter MP2482 Rev.1.4 www.MonolithicP 1 9/21/2011 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change 2011 MPS. All Rights Reserved. The Future of Analog IC TechnologyDESCRIPTION The MP2482
2、is a monolithic step-down switch mode converter with a built in internal power MOSFET. It achieves 5A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault conditio
3、n protection includes cycle-by-cycle current limiting and thermal shutdown. The MP2482 requires a minimum number of readily available standard external components and is available in 8-pin SOIC package with and without exposed pad. FEATURES Wide 4.5V to 30V Operating Input Range 5A Output Current 50
4、m Internal Power MOSFET Switch Power Good Indicator Fixed 420kHz Frequency Synchronizable up to 1.5MHz Cycle-by-Cycle Over Current Protection with hiccup Thermal Shutdown Output Adjustable from 0.81V Stable with Low ESR Output Ceramic Capacitors Available in 8-Pin SOIC Package and Thermally Enhanced
5、 8-Pin SOIC Package APPLICATIONS Digital Set Top Boxes Personal Video Recorders Broadband Communications Flat Panel Television and Monitors “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP2482SWFBBST1542GNDINEN/SYNCVOUT
6、3.3V 5AVCCD1B530CVINOFF ONPGVCC8763Efficiency vs Output CurrentVOUT=3.3VEFFICIENCY(%)OUTPUT CURRENT (A)12345707580859095100VIN=5VVIN=30VVIN=12VMP2482 5A, 30V, 420kHZ STEP-DOWN CONVERTER MP2482 Rev.1.4 www.MonolithicP 2 9/21/2011 MPS Proprietary Information. Unauthorized Photocopy and Duplication Pro
7、hibited. Preliminary Specifications Subject to Change 2011 MPS. All Rights Reserved. ORDERING INFORMATION Part Number Package Top Marking Free Air Temperature(TA)MP2482DN* SOIC8E MP2482DN MP2482DS* SOIC8 MP2482DS -40C to +85C * For Tape & Reel, add suffix Z (eg. MP2482DNZ). For RoHS Compliant Packag
8、ing, add suffix LF (eg. MP2482DNLFZ) * For Tape & Reel, add suffix Z (eg. MP2482DSZ). For RoHS Compliant Packaging, add suffix LF (eg. MP2482DSLFZ) PACKAGE REFERENCE SWBSTVCCGNDINEN/SYNCPGFB12348765TOP VIEWEXPOSED PADON BACKSIDESOIC8E 12348765TOP VIEWSWBSTVCCGNDINEN/SYNCPGFBSOIC8 ABSOLUTE MAXIMUM RA
9、TINGS (1)Supply Voltage VIN. 32V VSW.-0.3V(-5V for 65% In these cases, an external BST diode is recommended from the output of the voltage regulator to BST pin, as shown in Fig.5 MP2482SWBSTCLBSTCOUT5V or 3.3VExternal BST DiodeIN4148Figure 5Add Optional External Bootstrap Diode to Enhance Efficiency
10、 The recommended external BST diode is IN4148, and the BST cap is 0.11F. By using this circuit, 5V input voltage can output 3.3V and 2.5V with just 30mA load. MP2482 5A, 30V, 420kHZ STEP-DOWN CONVERTER MP2482 Rev. 1.4 www.MonolithicP 13 9/21/2011 MPS Proprietary Information. Unauthorized Photocopy a
11、nd Duplication Prohibited. 2011 MPS. All Rights Reserved. PACKAGE INFORMATION SOIC8E (EXPOSED PAD) SEE DETAIL “A“0.0075(0.19)0.0098(0.25)0.050(1.27)BSC0.013(0.33)0.020(0.51)SEATING PLANE0.000(0.00)0.006(0.15)0.051(1.30)0.067(1.70)TOP VIEWFRONT VIEWSIDE VIEWBOTTOM VIEWNOTE:1) CONTROL DIMENSION IS IN
12、INCHES. DIMENSION INBRACKET IS IN MILLIMETERS.2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,PROTRUSIONS OR GATE BURRS.3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASHOR PROTRUSIONS.4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)SHALL BE 0.004“ INCHES MAX.5) DRAWING CONFORMS TO JEDEC MS-012, VAR
13、IATION BA.6) DRAWING IS NOT TO SCALE.0.089(2.26)0.101(2.56)0.124(3.15)0.136(3.45)RECOMMENDED LAND PATTERN0.213(5.40)0.063(1.60)0.050(1.27)0.024(0.61)0.103(2.62)0.138(3.51)0.150(3.80)0.157(4.00)PIN 1 ID0.189(4.80)0.197(5.00)0.228(5.80)0.244(6.20)14850.016(0.41)0.050(1.27)0o-8oDETAIL “A“0.010(0.25)0.0
14、20(0.50)x 45o0.010(0.25) BSCGAUGE PLANEMP2482 5A, 30V, 420kHZ STEP-DOWN CONVERTER 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 a
15、ny application. MPS will not assume any legal responsibility for any said applications. MP2482 Rev. 1.4 www.MonolithicP 14 9/21/2011 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. SOIC8 0.016(0.41)0.050(1.27)0o-8oDETAIL “A“0.010(0.25) 0
16、.020(0.50)x 45oSEE DETAIL “A“0.0075(0.19)0.0098(0.25)0.150(3.80)0.157(4.00)PIN 1 ID0.050(1.27)BSC0.013(0.33)0.020(0.51)SEATING PLANE0.004(0.10)0.010(0.25)0.189(4.80)0.197(5.00)0.053(1.35)0.069(1.75)TOP VIEWFRONT VIEW0.228(5.80)0.244(6.20)SIDE VIEW1485RECOMMENDED LAND PATTERN0.213(5.40)0.063(1.60)0.0
17、50(1.27)0.024(0.61)NOTE:1) CONTROL DIMENSION IS IN INCHES. DIMENSION INBRACKET IS IN MILLIMETERS.2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,PROTRUSIONS OR GATE BURRS.3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASHOR PROTRUSIONS.4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)SHALL BE 0.004“ INCHES MAX.5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA.6) DRAWING IS NOT TO SCALE. 0.010(0.25) BSCGAUGE PLANE
