MP2497DN-LF

MP2497 3A, 50V, 100kHz Step-Down Converter with Programmable Output OVP Threshold The Future of Analog IC Technology DESCRIPTION FEATURES The MP2497 is a monolithic step-down switch Wide 4.5V to 50V Operating Input Range mode converter with a programmable output Programmable Output Over Voltage current limit. It achieves 3A continuous output Protection current over a wide input supply range with Output Adjustable from 0.8V to 25V excellent load and line regulation. An internal 0.15 Internal Power MOSFET Switch 2~4ms soft start prevents inrush current at turning Internal 4ms Soft Start on. And it is capable of providing output line drop Stable with Low ESR Output Ceramic compensation. Capacitors Fixed 100kHz Frequency MP2497 achieves low EMI signature with well controlled switching edges. Low EMI Signature Thermal Shutdown Fault condition protection includes hiccup current Output Line Drop Compensation limit and short circuit protection, programmable Hiccup Circuit Limit and Short Circuit output over voltage protection and thermal Protection shutdown. Available in SOIC8 and SOIC8E Package The MP2497 requires a minimum number of readily available standard external components. APPLICATIONS The MP2497 is available in SOIC8 and SOIC8E USB Power Supplies package. 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 Products, Quality Assurance page. MPS and The Future of Analog IC Technology are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION R6 Efficiency vs. 0O Output Current L1 C6 C C R 3 4 C10 SENSE V =5V 33H OUT 0.1F 100F 22F 33mO 0.1F 95 C BST SW V 2 OUT + 2.2F V =12V IN VIN C5 V IN D1 90 0.1F C 1 C11 220F 0.1F 85 OVP GND R R3 4 80 MP2497 GND 39kO V =24V 10kO IN 75 ISP C7 R 7 GND 70 10nF 1kO V =50V IN 65 FB C ISN 9 C R 8 5 150pF 10nF 1kO 60 55 R1 R2 0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9 301kO 57.6kO OUTPUT CURRENT (A) MP2497 Rev. 1.12 www.MonolithicPower.com 1 12/22/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. EFFICIENCY (%) MP2497 3A, 50V, 100kHz STEP-DOWN CONVERTER ORDERING INFORMATION Part Number Package Top Marking Operating Temperature (T ) J MP2497DS* SOIC8 MP2497 -40 C to +125 C MP2497DN** SOIC8E MP2497 -40 C to +125 C * For Tape & Reel, add suffix Z (e.g. MP2497DSZ) For RoHS, compliant packaging, add suffix LF (e.g. MP2497DSLFZ). ** For Tape & Reel, add suffix Z (e.g. MP2497DNZ) For RoHS, compliant packaging, add suffix LF (e.g. MP2497DNLFZ). PACKAGE REFERENCE SOIC8 SOIC8E (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Input Voltage V .......................................... 60V SOIC8..................................... 90...... 45... C/W IN V V ..............................................0V to 25V ISN, ISP SOIC8E .................................. 50...... 10... C/W V V ...........................................0V to 0.4V ISN - ISP Notes: V ........................................-0.3V to V + 0.3V SW IN 1) Exceeding these ratings may damage the device. V ................................................... V + 6.5V BST SW 2) The maximum allowable power dissipation is a function of the maximum junction temperature T (MAX), the junction-to- All Other Pins...............................-0.3V to +6.5V J ambient thermal resistance , and the ambient temperature JA Junction Temperature...............................150C T . The maximum allowable continuous power dissipation at A Lead Temperature ....................................260C any ambient temperature is calculated by P (MAX) = (T D J (MAX)-T )/ . Exceeding the maximum allowable power A JA Storage Temperature............... -65C to +150 C dissipation will cause excessive die temperature, and the (2) regulator will go into thermal shutdown. Internal thermal Continuous Power Dissipation (T = +25C) A shutdown circuitry protects the device from permanent SOIC8 ...................................................... 1.38W damage. SOIC8E...................................................... 2.5W 3) The device is not guaranteed to function outside of its operating conditions. (3) 4) Measured on JESD51-7, 4-layer PCB. Recommended Operating Conditions Input Voltage V ..............................4.5V to 50V IN Output Voltage V (V >26.5V) .....0.8V to 25V OUT IN Output Voltage V (V <=26.5V)...................... OUT IN .........................................0.8V to (V 1.5)V IN Maximum Junction Temp. (T )................+125C J MP2497 Rev. 1.12 www.MonolithicPower.com 2 12/22/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved.