MP2493DS-LF Monolithic Power Systems

MP2493 2A, 36V, Low EMI Step-Down Converter with Programmable Output Current Limit The Future of Analog IC Technology DESCRIPTION FEATURES The MP2493 is a monolithic step-down switch Wide 4.5V to 36V Operating Input Range mode converter with a programmable output Programmable up to 2A Output Current current limit. It achieves 2A continuous output Output Adjustable from 0.8V to 15V current over a wide input supply range with Programmable Output Current Limit without excellent load and line regulation. power loss The maximum output current can be 0.25 Internal Power MOSFET Switch programmed by sensing current through the Stable with Low ESR Output Ceramic inductor DC resistance (DCR) or an accurate Capacitors sense resistor. Up to 95% Efficiency Fixed 130kHz Frequency with low EMI Fault condition protection includes cycle-by-cycle Thermal Shutdown current limiting and thermal shutdown. Cycle-by-Cycle Over Current Protection The MP2493 requires a minimum number of Available in 8-Pin SOIC and 8-pin SOIC8E readily available standard external components. Packages The MP2493 is available in 8-pin SOIC, and 8- pin SOICE packages. APPLICATIONS USB Power Supplies Automotive Cigarette Lighter Adapters Power Supply for Linear Chargers All MPS parts are lead-free and adhere to the RoHS directive. 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 V =5V OUT 5V 100 R8 0 U1 7 R4 BST 1k 92 5 6V - 36V 1 ISN VIN VIN + V =12V IN R9 C6 MP2493 47nF 20k 6 84 ISP C10 R6 R3 4.7nF 4.7k 4.02k GND 8 SW VOUT 76 R7 200k D1 4 3 + GND SS FB 3A/40V GND R5 68 2 0 C7 150pF 60 0 0.4 0.8 1.2 1.6 2 OUTPUT CURRENT (A) MP2493 Rev. 1.0 www.MonolithicPower.com 1 2/12/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved. EFFICIENCY (%)MP2493 2A, 36V, LOW EMI STEP-DOWN WITH PROGRAMMABLE OUTPUT CURRENT LIMIT ORDERING INFORMATION Part Number Package Top Marking Free Air Temperature (T ) A MP2493DS* SOIC8 MP2493DS 40 C to +85C MP2493DN** SOIC8E MP2493DN 40 C to +85C * For Tape & Reel, add suffix Z (e.g. MP2493DSZ) For RoHS, compliant packaging, add suffix LF(e.g. MP2493DSLFZ) ** For Tape & Reel, add suffix Z (e.g. MP2493DNZ) For RoHS, compliant packaging, add suffix LF(e.g. MP2493DNLFZ) PACKAGE REFERENCE TOP VIEW TOP VIEW VIN 1 8 SW VIN 1 8 SW GND 2 7 BST FB 3 6 ISP GND 2 7 BST SS 4 5 ISN FB 3 6 ISP SS 4 5 ISN EXPOSED PAD ON BACKSIDE CONNECT TO GND SOIC8 SOIC8E (4) (1) Thermal Resistance JA JC ABSOLUTE MAXIMUM RATINGS SOIC8 .....................................90 ...... 45... C/W Supply Voltage V ....................................... 40V IN SOIC8E...................................50 ...... 10... C/W V ....................................... 0.3V to V + 0.3V SW IN V ................................................... V + 6.5V BST SW Notes: 1) Exceeding these ratings may damage the device. V v ................................................0V to15V ISN, ISP 2) The maximum allowable power dissipation is a function of the All Other Pins..............................0.3V to +6.5V maximum junction temperature T(MAX), the junction-to- J (2) ambient thermal resistance , and the ambient temperature JA Continuous Power Dissipation (T = +25C) A T . The maximum allowable continuous power dissipation at A SOIC8...1.4W any ambient temperature is calculated by P (MAX)=(T (MAX - D J ) T )/ . Exceeding the maximum allowable power dissipation A JA SOIC8E....2.5W will cause excessive die temperature, and the regulator will go Junction Temperature...............................150C into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. Lead Temperature ....................................260C 3) The device is not guaranteed to function outside of its Storage Temperature.............. 65 C to +150 C operating conditions. 4) Measured on JESD51-7, 4-layer PCB. (3) Recommended Operating Conditions Supply Voltage V ...........................4.5V to 36V IN Output Voltage V (V >16.5V) .....0.8V to 15V OUT IN Output Voltage V (V <=16.5V)...................... OUT IN ........................................0.8V to (V 1.5) V IN Operating Junction Temperature (T ) J ................................................ 40C to +125 C MP2493 Rev. 1.0 www.MonolithicPower.com 2 2/12/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved.