TM MP1540 1.3MHz, 18V Step-Up Converter TM The Future of Analog IC Technology DESCRIPTION FEATURES The MP1540 is a 5-pin thin TSOT23 current On Board Power MOSFET mode step-up converter intended for small, low Uses Tiny Capacitors and Inductors power applications. The MP1540 switches at 1.3MHz Fixed Switching Frequency 1.3MHz and allows the use of tiny, low cost Internal Soft-Start capacitors and inductors 2mm or less in height. Operates with Input Voltage as Low as Internal soft-start results in small inrush current 2.5V and Output Voltage as High as 18V and extends battery life. The MP1540 operates 12V at 200mA from 5V Input from an input voltage as low as 2.5V and can UVLO, Thermal Shutdown generate 12V at up to 200mA from a 5V Internal Current Limit supply. Available in a TSOT23-5 Package The MP1540 includes under voltage lockout, current limiting, and thermal overload APPLICATIONS protection to prevent damage in the event of an Camera Phone Flash output overload. The MP1540 is available in a Handheld Computers and PDAs small 5-pin TSOT23 package. Digital Still and Video Cameras External Modems Small LCD Displays White LED Driver MPS and The Future of Analog IC Technology are Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION D1 Efficiency vs Load Current V V IN OUT 100 5V 12V 200mA 95 V = 5V IN 90 85 80 V = 3.3V IN 51 75 V = 4.2V IN IN SW 4 70 OFF ON EN MP1540 65 2 3 GND FB 60 55 50 0 75 150 225 300 375 450 LOAD CURRENT (mA) MP1540 TAC01 MP1540 TAC EC01 MP1540 Rev. 1.1 www.MonolithicPower.com 1 2/14/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2006 MPS. All Rights Reserved. EFFICIENCY (%)D9YW TM MP1540 1.3MHz, 18V STEP-UP CONVERTER (1) PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS SW Pin ........................................ 0.3V to +20V All Other Pins ............................. 0.3V to +6.5V TOP VIEW Junction Temperature .............................. 150C Lead Temperature.................................... 260C SW 1 5 IN Storage Temperature ..............65C to +150C (2) GND 2 Recommended Operating Conditions Supply Voltage V ............................ 2.5V to 6V IN FB 3 4 EN Output Voltage V ........................... 3V to 18V OUT Operating Temperature.............40C to +85 C MP1540 PD01 TSOT23-5 (3) Thermal Resistance JA JC TSOT23-5.............................. 220.....110 .. C/W Part Number* Package Temperature Notes: 1) Exceeding these ratings may damage the device. MP1540DJ TSOT23-5 40 C to +85 C 2) The device is not guaranteed to function outside of its For Tape & Reel, add suffix Z (eg. MP1540DJZ) operating conditions. * For Lead Free, add suffix LF (eg. MP1540DJLFZ) 3) Measured on approximately 1 square of 1 oz copper. ELECTRICAL CHARACTERISTICS V = V = 5V, T = +25 C unless specified otherwise. IN EN A Parameters Symbol Condition Min Typ Max Units Operating Input Voltage V 2.5 6 V IN Under Voltage Lockout 2.25 2.45 V Under Voltage Lockout 92 mV Hysteresis Supply Current (Shutdown) V = 0V 0.1 1 A EN Supply Current (Quiescent) V = 1.3V 635 850 A FB Switching Frequency f 1.0 1.3 1.6 MHz SW Maximum Duty Cycle V = 0V 80 85 % FB EN Threshold V Rising 1.0 1.3 1.6 V EN EN Threshold V Rising, V = 2.5V 1.1 V EN IN EN Hysteresis 100 mV EN Input Bias Current V = 0V, 6V 1 A EN FB Voltage V 1.21 1.25 1.29 V FB FB Input Bias Current V = 1.25V 100 30 nA FB (4) SW On-Resistance R 0.65 DS (ON) (4) SW Current Limit 1.9 A SW Leakage V = 15V 1 A SW (4) Thermal Shutdown 160 C Note: 4) Guaranteed by design. MP1540 Rev. 1.1 www.MonolithicPower.com 2 2/14/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2006 MPS. All Rights Reserved.