MP2490DS-LF

MP2490 1.5A, 36V, 700KHz Step-Down Converter with Programmable Output Current Limit The Future of Analog IC Technology DESCRIPTION FEATURES The MP2490 is a monolithic step-down switch mode converter with a programmable output current limit. It achieves 1.5A 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 MP2490 requires a minimum number of readily available standard external components. The MP2490 is available in QFN10 (3mm x 3mm), 8-pin SOIC and PDIP packages. Wide 4.5V to 36V Operating Input Range Programmable up to 1.5A 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 95% Efficiency @ 500mA (Vo=5V) Fixed 700kHz Frequency Thermal Shutdown Cycle-by-Cycle Over Current Protection Available in QFN10 (3mm x 3mm), 8-Pin SOIC and PDIP 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 vs. Load Current 8 BST ISN VIN ISP EN R5 6 7 R8 C9 10nF MP2490 3 EN SW C6 10nF L1 10 5V PGOOD V-PULL-UP VOUT D1 5 FB SS VIN=8V 90 4 EFFICIENCY (%) VIN 4.5V - 36V 100 9 PGOOD 1 VIN=12V 80 70 60 VIN=24V GND 2 MP2490 Rev. 1.0 4/9/2014 GND 50 10 VOUT=5V 100 1000 LOAD CURRENT (mA) www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 10000 1 MP2490 – 1.5A, 36V, 700kHz STEP-DOWN WITH PROGRAMMABLE OUTPUT CURRENT LIMIT ORDERING INFORMATION Part Number Package Top Marking Free Air Temperature (TA) MP2490DQ * QFN10 (3mm X 3mm) T6 –40°C to +85°C MP2490DS SOIC8 MP2490DS –40°C to +85°C MP2490CP PDIP8 MP2490CP 0°C to +70°C * For Tape & Reel, add suffix –Z (e.g. MP2490DQ–Z); For RoHS, compliant packaging, add suffix –LF (e.g. MP2490DQ–LF–Z). PACKAGE REFERENCE TOP VIEW VIN 1 10 SW GND 2 9 BST EN 3 8 PGOOD FB 4 7 ISP SS 5 6 ISN TOP VIEW VIN 1 8 SW GND 2 7 BST FB 3 6 ISP SS 4 5 ISN EXPOSED PAD ON BACKSIDE CONNECT TO GND QFN10 (3mm X 3mm) SOIC/PDIP ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance 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) QFN10 (3mm x 3mm) ................................ 2.5W SOIC8 ...................................................... 1.39W PDIP8 ...................................................... 1.32W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature.............. –65°C to +150°C QFN10 (3mm x 3mm) .............50 ...... 12 ... °C/W SOIC8 .....................................90 ...... 45 ... °C/W PDIP8......................................95 ...... 55 ... °C/W Recommended Operating Conditions (3) Supply Voltage VIN ...........................4.5V to 36V Output Voltage VOUT (VIN>16.5V) ....... 0.8V to 15 Output Voltage VOUT (VIN