MP1498 High-Efficiency, 2A, 16V, 1.4MHz Synchronous, Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP1498 is a high-frequency, synchronous, Wide 4.5V-to-16V Operating Input Range rectified, step-down, switch-mode converter 100m/40m Low R Internal Power DS(ON) with built-in internal power MOSFETs. It offers a MOSFETs very compact solution to achieve 2A continuous Proprietary Switching-LossReduction output current with excellent load and line Technique regulation over a wide input supply range. The High-Efficiency Synchronous Mode MP1498 has synchronous mode operation for Operation higher efficiency over the output current load Fixed 1.4MHz Switching Frequency range. Can Synchronize to a 300kHz-to-3MHz External Clock Current-mode operation provides a fast Externally-Programmable Soft-Start transient response and eases loop stabilization. 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 MP1498 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 100 R3 C4 C1 20 95 0.1 F 22 F MP1498 3.3V/2A 90 3 6 SW EN/SYNC L1 85 EN/ 2.2 H R1 C2 80 SYNC 40.2k 22 F 7 VCC 75 8 C3 FB 70 0.1 F 1 R5 65 SS R2 24k GND 13k C5 60 4 22nF 55 50 0.0 0.4 0.8 1.2 1.6 2.0 MP1498 Rev. 1.01 www.MonolithicPower.com 1 12/18/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2012 MPS. All Rights Reserved. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP2332HMP1498 SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS ORDERING INFORMATION Part Number* Package Top Marking MP1498DJ TSOT-23-8 ADU For Tape & Reel, add suffix Z (e.g. MP1498DJZ) For RoHS, compliant packaging, add suffix LF (e.g. MP1498DJLFZ). PACKAGE REFERENCE (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 BST 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 MP1498 Rev. 1.01 www.MonolithicPower.com 2 12/18/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2012 MPS. All Rights Reserved. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP2332H