MP1472GJ-P

MP1472 2A, 18V Synchronous Rectified Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP1472 is a monolithic synchronous buck 2A Output Current regulator. The device integrates a 175m high- Wide 4.75V to 18V Operating Input Range side MOSFET and a 115m low-side MOSFET Integrated Power MOSFET Switches that provide 2A of continuous load current over Output Adjustable from 0.923V to 15V a wide input voltage of 4.75V to 18V. Current Up to 95% Efficiency mode control provides fast transient response Programmable Soft-Start and cycle-by-cycle current limit. Stable with Low ESR Ceramic Output Capacitors An adjustable soft-start prevents inrush current at turn-on, and in shutdown mode the supply Fixed 340kHz Frequency current drops to 1A. Cycle-by-Cycle Over Current Protection Input Under Voltage Lockout This device, available in an 8-pin TSOT23-8 8Pin TSOT23-8 package, provides a very compact solution with minimal external components. APPLICATIONS Distributed Power Systems EVALUATION BOARD REFERENCE Networking Systems Board Number Dimensions FPGA, DSP, ASIC Power Supplies Green Electronics/ Appliances EV1472GJ-00A 2.5X x 2.5Y x 0.5Z Notebook Computers For MPS green status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION Efficiency vs. Load Current V =3.3V OUT 100 90 80 V =4.75V 70 IN 60 V =12V IN 50 40 30 20 V =18V IN 10 0 0.01 0.1 1 10 LOAD CURRENT (A) MP1472 Rev. 1.0 www.MonolithicPower.com 1 9/2/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP1476 EFFICIENCY (%)MP1472 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER ORDERING INFORMATION Part Number Package Top Marking TSOT23-8 MP1472GJ* ACW *For Tape & Reel, add suffix Z (e.g. MP1472GJZ) PACKAGE REFERENCE TOP VIEW SS 1 8 BST EN 2 7 IN COMP SW 3 6 FB GND 4 5 (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage V ........................ -0.3V to +20V TSOT23-8 .............................. 100 ..... 55 ... C/W IN Switch Node Voltage V ............................ 21V SW Notes: Boost Voltage V .......... V 0.3V to V + 6V BS SW SW 1) Exceeding these ratings may damage the device. All Other Pins .................................. -0.3V to +6V 2) The maximum allowable power dissipation is a function of the maximum junction temperature T(MAX), the junction-to- J Junction Temperature ............................... 150C ambient thermal resistance , and the ambient temperature JA Continuous Power Dissipation (T = +25C) A T . The maximum allowable continuous power dissipation at A (2) any ambient temperature is calculated by P (MAX)=(T (MAX)- D J T )/ . Exceeding the maximum allowable power dissipation A JA .1.25W will cause excessive die temperature, and the regulator will go Lead Temperature .................................... 260C into thermal shutdown. Internal thermal shutdown circuitry Storage Temperature .............. -65C to +150C protects the device from permanent damage. 3) The device is not guaranteed to function outside of its (3) operating conditions. Recommended Operating Conditions 4) Measured on JESD51-7 4-layer PCB. Input Voltage V ............................ 4.75V to 18V IN Output Voltage V ..................... 0.923V to 15V OUT Maximum Junction Temp. (T ) ............... +125C J MP1472 Rev. 1.0 www.MonolithicPower.com 2 9/2/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP1476