MP2493DS-LF

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 mode converter with a programmable output current limit. It achieves 2A continuous output current over a wide input supply range with excellent load and line regulation. • • • • The maximum output current can be programmed by sensing current through the inductor DC resistance (DCR) or an accurate sense resistor. • • • • • • • Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. The MP2493 requires a minimum number of readily available standard external components. The MP2493 is available in 8-pin SOIC, and 8pin SOICE packages. Wide 4.5V to 36V Operating Input Range Programmable up to 2A Output Current Output Adjustable from 0.8V to 15V Programmable Output Current Limit without power loss 0.25Ω Internal Power MOSFET Switch Stable with Low ESR Output Ceramic Capacitors Up to 95% Efficiency Fixed 130kHz Frequency with low EMI Thermal Shutdown Cycle-by-Cycle Over Current Protection Available in 8-Pin SOIC and 8-pin SOIC8E 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 VOUT=5V 5V 100 R8 0 7 R4 1k BST VIN 6V - 36V 1 + ISN VIN MP2493 ISP 5 6 C10 4.7nF GND SW 4 SS FB GND 2 C6 47nF R9 20k R3 4.7k R6 4.02k 8 3 VOUT R7 200k D1 3A/40V + 92 V IN=12V 84 76 68 R5 0 GND EFFICIENCY (%) U1 C7 150pF 60 0 0.4 0.8 1.2 1.6 2 OUTPUT CURRENT (A) MP2493 Rev. 1.0 2/12/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 1 MP2493 – 2A, 36V, LOW EMI STEP-DOWN WITH PROGRAMMABLE OUTPUT CURRENT LIMIT ORDERING INFORMATION Part Number Package Top Marking Free Air Temperature (TA) MP2493DS* SOIC8 MP2493DS –40°C to +85°C MP2493DN** SOIC8E MP2493DN –40°C to +85°C * For Tape & Reel, add suffix –Z (e.g. MP2493DS–Z); For RoHS, compliant packaging, add suffix –LF(e.g. MP2493DS–LF–Z) ** For Tape & Reel, add suffix –Z (e.g. MP2493DN–Z); For RoHS, compliant packaging, add suffix –LF(e.g. MP2493DN–LF–Z) PACKAGE REFERENCE TOP VIEW TOP VIEW VIN 1 8 SW GND 2 7 BST VIN 1 8 SW GND 2 7 BST FB 3 6 ISP FB 3 6 ISP SS 4 5 ISN SS 4 5 ISN EXPOSED PAD ON BACKSIDE CONNECT TO GND SOIC8 SOIC8E ABSOLUTE MAXIMUM RATINGS (1) Supply Voltage VIN ....................................... 40V VSW ....................................... –0.3V to VIN + 0.3V VBST ................................................... VSW + 6.5V VISN, vISP ................................................0V to15V All Other Pins ..............................–0.3V to +6.5V (2) Continuous Power Dissipation (TA = +25°C) SOIC8………………………………………...1.4W SOIC8E……………………………………....2.5W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature.............. –65°C to +150°C Recommended Operating Conditions (3) Thermal Resistance (4) θJA θJC SOIC8 .....................................90 ...... 45 ... °C/W SOIC8E ...................................50 ...... 10 ... °C/W Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ(MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD(MAX)=(TJ(MAX)TA)/ θJA. Exceeding the maximum allowable power 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. Supply Voltage VIN ...........................4.5V to 36V Output Voltage VOUT (VIN>16.5V) .....0.8V to 15V Output Voltage VOUT (VIN