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MP1580HS-Z
TM MP1580 2A, 380 KHz Step-Down Converter The Future of Analog IC Technology TM DESCRIPTION FEATURES The MP1580 is a monolithic step-down switch mode converter with a built in internal power MOSFET. It achieves 2A 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 condition protection includes cycle-by-cycle current limiting and thermal shutdown. In shutdown mode the regulator draws 23μA of supply current. The MP1580 requires a minimum number of readily available standard external components. A synchronization pin allows the part to be driven to 600KHz. EVALUATION BOARD REFERENCE Board Number Dimensions EV0007 2.3”X x 1.5”Y x 0.5”Z • • • • • • • • • • 2A Output Current 0.18Ω Internal Power MOSFET Switch Stable with Low ESR Output Ceramic Capacitors Up to 95% Efficiency 23μA Shutdown Mode Fixed 380KHz Frequency Thermal Shutdown Cycle-by-Cycle Over Current Protection Wide 4.75 to 25V Operating Input Range Output Adjustable from 1.22V to 21V Programmable Under Voltage Lockout Frequency Synchronization Input Available in an 8-Pin SO Package APPLICATIONS • • • Distributed Power Systems Battery Chargers Pre-Regulator for Linear Regulators “MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION INPUT 4.75V to 25V OPEN NOT USED 95 2 7 8 VOUT = 5.0V 1 IN BS SW EN MP1580 SYNC FB GND 4 3 5 D1 OUTPUT 2.5V / 2A COMP 6 C6 OPEN C3 2.2nF 90 EFFICIENCY (%) OFF ON Efficiency vs Output Current Voltage C5 10nF VOUT = 3.3V VOUT = 2.5V 85 80 75 VIN = 10V 70 0 MP1580_TAC_S01 0.5 1 1.5 2 OUTPUT CURRENT (A) MP1580_TAC_EC01 MP1580 Rev. 3.0 10/10/2007 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 1
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