MP1497 High-Efficiency, 3A, 16V, 500kHz Synchronous, Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP1497 is a high-frequency, synchronous, Wide 4.5V-to-16V Operating Input Range rectified, step-down switch mode converter with 80m/30m Low R Internal Power DS(ON) built in internal power MOSFETs. It offers a MOSFETs very compact solution to achieve 3A continuous Proprietary Switching-LossReduction output current with excellent load and line Technique regulation over a wide input supply range. The High-Efficiency Synchronous Mode MP1497 has synchronous mode operation for Operation higher efficiency over the output current load Fixed 500kHz Switching Frequency range. Can Synchronize to a 200kHz-to-2MHz External Clock Current-mode operation provides a fast transient response and eases loop stabilization. Externally-Programmable Soft-Start OCP and Hiccup Protective features include over-current Thermal Shutdown protection, thermal shutdown, and external SS Output Adjustable from 0.8V control. Available in an 8-pin TSOT-23 Package The MP1497 requires a minimal number of APPLICATIONS readily-available external components and is available in a space-saving 8-pin TSOT23 Notebook Systems and I/O Power package. Digital Set-Top Boxes Flat-Panel Televisions and Monitors Distributed Power Systems 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 2 5 VIN IN BST 4.5V-16V C4 C1 22 MP1497 3 3.3V/3A 6 SW EN/SYNC L1 EN C2 R1 7 R3 40.2k VCC 33k 8 FB C3 0.1 1 R2 SS 13k GND C5 4 22 MP1497 Rev. 1.06 www.MonolithicPower.com 1 9/7/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2015 MPS. All Rights Reserved. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP2333MP1497 SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS ORDERING INFORMATION Part Number* Package Top Marking MP1497DJ TSOT-23-8 ACQ For Tape & Reel, add suffix Z (e.g. MP1497DJZ) For RoHS, compliant packaging, add suffix LF (e.g. MP1497DJLFZ). PACKAGE REFERENCE TOP VIEW SS FB 1 8 IN VCC 2 7 SW EN/SYNC 3 6 GND BST 4 5 (1) (5) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC V ..................................................-0.3V to 17V TSOT-23-8............................. 100..... 55... C/W IN V ...-0.3V (-5V for <10ns) to 17V (19V for 5ns) SW Notes: V ......................................................... V +6V BS SW 1) Exceeding these ratings may damage the device. (2) 2) About the details of the EN pins ABS MAX rating, please All Other Pins................................ -0.3V to 6V refer to Page 9, Enable section. (3) Continuous Power Dissipation (T = +25C) 3) The maximum allowable power dissipation is a function of the A maximum junction temperature T (MAX), the junction-to- J ...........................................................1.25W ambient thermal resistance , and the ambient temperature JA Junction Temperature...............................150C T . The maximum allowable continuous power dissipation at A any ambient temperature is calculated by P (MAX) = (T Lead Temperature ....................................260C D J (MAX)-T )/ . Exceeding the maximum allowable power A JA Storage Temperature................. -65C to 150C dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal (4) Recommended Operating Conditions shutdown circuitry protects the device from permanent damage. Supply Voltage V ...........................4.5V to 16V IN 4) The device is not guaranteed to function outside of its Output Voltage V .................... 0.8V to V 3V OUT IN operating conditions. Operating Junction Temp. (T ). -40C to +125C 5) Measured on JESD51-7, 4-layer PCB. J MP1497 Rev. 1.06 www.MonolithicPower.com 2 9/7/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2015 MPS. All Rights Reserved. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP2333