MP2452 1A, 36V, 1MHz Step-Down Converter The Future of Analog IC Technology FEATURES DESCRIPTION 1A Continuous Load Current The MP2452 is a high frequency (1MHz) step- 130 A Operating Quiescent Current down switching regulator with integrated Wide 3.3V to 36V Operating Input Range internal high-side high voltage power MOSFET. 500 m Internal Power MOSFET It provides up to 1A highly efficient output 1MHz fixed Switching Frequency current with current mode control for fast loop Internally compensated response. Stable with Ceramic Output Capacitors The wide 3.3V to 36V input range accommodates Internal Soft-Start a variety of step-down applications in automotive > 90% Efficiency input environment. A 3A shutdown mode +0.794V FB Reference Voltage quiescent current allows use in battery-powered Output Adjustable from +0.794V to 33V applications. 3A Low Shutdown Supply Current High power conversion efficiency over a wide 2mm x 3mm QFN8 Package load range is achieved by scaling down the switching frequency at light load condition to APPLICATIONS reduce the switching and gate driving losses. High Voltage Power Conversion Frequency fold-back helps prevent inductor current Automotive Systems runaway during start-up. Thermal shutdown Industrial Power Systems provides reliable, fault-tolerant operation. Distributed Power Systems Battery Powered Systems The MP2452 is available in the 2mm x 3mm QFN8 package. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc.. TYPICAL APPLICATION Efficiency VOUT=5V 100 V =12V IN 95 V =8V C4 IN L1 VOUT 100nF 5V/1A 6.8uH 90 3 2 o SW BST 85 18 D1 NC NC MP2452 80 V IN 6 4 GND o VIN 75 C1 70 5 7 V =36V FB EN o 65 IN Control C3 60 V =24V 10pF IN 55 50 10 100 1000 OUTPUT CURRENT(mA) MP2452 Rev. 1.0 www.MonolithicPower.com 1 9/27/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2010 MPS. All Rights Reserved. EFFICIENCY (%)MP2452 1A, 36V, 1MHz, STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking Temperature QFN8(2mm x 3mm) MP2452DD 5F 40 C to +85C * For Tape & Reel, add suffix Z (e.g. MP2452DDZ). For RoHS compliant packaging, add suffix LF (e.g. MP2452DDLFZ) PACKAGE REFERENCE (1) (3) ABSOLUTE MAXIMUM RATINGS Recommended Operating Conditions Supply Voltage (V ).......................0.3V to 40V Supply Voltage V ...........................3.3V to 36V IN IN Switch Voltage (V ).............. 0.3V to V +0.3V Output Voltage V ...................+0.794V to 33V SW IN OUT BST to SW ....................................... -0.3 to 5.0V Operating Temperature............. 40 C to +85 C All Other Pins................................0.3V to 5.0V (4) (2) Thermal Resistance JA JC Continuous Power Dissipation (T = +25C) A QFN8(2mmx3mm) ..................55 ...... 12... C/W .2.3W 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 150 C 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 D J (MAX)-T )/ . Exceeding the maximum allowable power A JA dissipation 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. MP2452 Rev. 1.0 www.MonolithicPower.com 2 9/27/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2010 MPS. All Rights Reserved.