MP1582 2A, 28V, 1.5MHz Step-Down Converter The Future of Analog IC Technology MPS CONFIDENTIAL AND PROPRIETARY INFORMATION SUPA USE ONLY FEATURES DESCRIPTION Wide 4.5V to 28V Operating Input Range The MP1582 is a high frequency step-down Programmable Switching Frequency up to switching regulator with integrated internal 1.5MHz high-side, high voltage power MOSFET. It High-Efficiency Pulse Skipping Mode for provides 2A output with current mode control Light Loads for fast loop response and easy compensation. Ceramic Capacitor Stable The wide 4.5V to 28V input range Internal Soft-Start accommodates a variety of step-down Precision Current Limit without a Current applications, including those in automotive Sensing Resistor systems. A 100A operational quiescent current Up to 95% Efficiency allows use in battery-powered applications. Available in SOIC8 with Exposed Pad High power conversion efficiency over a wide Packages load range is achieved by scaling down the APPLICATIONS switching frequency at light load condition to reduce the switching and gate driving losses. Game Machines Automotive Systems The frequency foldback prevents inductor Industrial Power Systems current runaway during startup and thermal Distributed Power Systems shutdown provides reliable, fault tolerant Printer Systems operation. Battery Powered Systems The MP1582 is available in thermally enhanced MPS and The Future of Analog IC Technology are Registered Trademarks of SOIC8 package. Monolithic Power Systems, Inc. TYPICAL APPLICATION Efficiency Curve C4 (f =500kHz) SW 100nF 100 V =12V 90 IN 8 80 7 1 BST V OUT V VIN SW IN 3.3V 70 D1 60 V =24V IN 2 4 EN FB EN 50 MP1582 40 6 3 30 FREQ COMP C3 20 GND 220pF C6 10 5 NS 0 0.01 0.1 1 10 OUTPUT CURRENT (A) MP1582 Rev. 1.0 www.MonolithicPower.com 1 4/17/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2009 MPS. All Rights Reserved. MPS CONFIDENTIAL DO NOT DISTRIBUTE EFFICIENCY (%)MP1582 2A, 28V, 1.5MHz STEP-DOWN CONVERTER MPS CONFIDENTIAL AND PROPRIETARY INFORMATION SUPA USE ONLY ORDERING INFORMATION Part Number* Package Top Marking Temperature MP1582EN SOIC8E MP1582EN 20 C to +85C For Tape & Reel, add suffix Z (eg. MP1582ENZ) For RoHS compliant packaging, add suffix LF (eg. MP1582ENLFZ) PACKAGE REFERENCE TOP VIEW SW 1 8 BST EN 2 7 VIN COMP 3 6 FREQ FB 4 5 GND (3) (1) Recommended Operating Conditions ABSOLUTE MAXIMUM RATINGS Supply Voltage V ...........................4.5V to 28V IN Supply Voltage (V ).......................0.3V to 30V IN Output Voltage V .........................0.8V to 30V OUT Switch Voltage (V )............ 0.3V to V + 0.3V SW IN Operating Temperature............. 20 C to +85 C BST to SW .....................................0.3V to +5V (4) All Other Pins.................................0.3V to +5V Thermal Resistance JA JC (2) Continuous Power Dissipation (T = +25C) A SOIC8E...................................50 ...... 10... C/W .............................................................2.5W Junction Temperature...............................150C Notes: 1) Exceeding these ratings may damage the device. Lead Temperature ....................................260C 2) The maximum allowable power dissipation is a function of the Storage Temperature.............. 65C to +150C maximum junction temperature T (MAX), the junction-to- J ambient thermal resistance , and the ambient temperature JA T . The maximum allowable continuous power dissipation at A any ambient temperature is calculated by P (MAX)=(T (MAX)- D J T )/ . Exceeding the maximum allowable power dissipation A JA will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. MP1582 Rev. 1.0 www.MonolithicPower.com 2 4/17/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2009 MPS. All Rights Reserved. MPS CONFIDENTIAL DO NOT DISTRIBUTE