MP2105DJ-LF-P

MP2105 1MHz, 800mA Synchronous Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES High Efficiency: Up to 95% The MP2105 is a 1MHz constant frequency, 1MHz Constant Switching Frequency current mode, PWM step-down converter. The device integrates a main switch and a 800mA Available Load Current synchronous rectifier for high efficiency without 2.5V to 6V Input Voltage Range an external Schottky diode. It is ideal for Output Voltage as Low as 0.6V powering portable equipment that runs from a 100% Duty Cycle in Dropout single cell Lithium-Ion (Li+) battery. The Current Mode Control MP2105 can supply 800mA of load current from Short Circuit Protection a 2.5V to 6V input voltage. The output voltage Thermal Fault Protection can be regulated as low as 0.6V. The MP2105 <0.1 A Shutdown Current can also run at 100% duty cycle for low dropout Space Saving 5-Pin TSOT23 and 10-pin applications. MSOP Packages The MP2105 is available in a low profile (1mm) APPLICATIONS 5-pin, TSOT and 10-pin, MSOP packages. Cellular and Smart Phones Microprocessors and DSP Core Supplies PDAs MP3 Players Digital Still and Video Cameras Portable Instruments 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 Efficiency vs Load Current 100 OUTPUT 4 V = 3.3V 3 IN INPUT IN SW 90 1.8V 2.5V to 6V 800mA 80 V = 4.2V MP2105 IN 70 5 1 60 EN FB OFF ON GND 50 2 40 30 20 10 0 MP2105 TAC S01 10 100 1000 LOAD CURRENT (mA) MP2105-EC01 MP2105 Rev. 1.51 www.MonolithicPower.com 1 10/25/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP2151 EFFICIENCY (%)MARKING MP2105 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number Package Top Marking Free Air Temperature (T ) A TSOT23-5 MP2105DJ* C5 40 C to +85C MSOP10 MP2105DK** 2105D 40 C to +85C * For Tape & Reel, add suffix Z (g. MP2105DJZ). For RoHS compliant packaging, add suffix LF (e.g. MP2105DJLFZ) ** For Tape & Reel, add suffix Z (g. MP2105DKZ). For RoHS compliant packaging, add suffix LF (e.g. MP2105DKLFZ) PACKAGE REFERENCE TOP VIEW EN 1 5 FB GND 2 SW 3 4 IN TSOT23-5 MSOP10 (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC V to GND ..................................0.3V to +6.5V IN TSOT23-5.............................. 220.... 110.. C/W V to GND........................... 0.3V to V +0.3V SW IN MSOP10 ................................ 150..... 65... C/W V , V to GND ..........................0.3V to +6.5V FB EN (2) Notes: Continuous Power Dissipation (T = +25C) A 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the TSOT23-5....0.56W maximum junction temperature T (MAX), the junction-to- J MSOP10....0.83W 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 D J Lead Temperature ..................................+260C (MAX)-T )/ . Exceeding the maximum allowable power A JA Storage Temperature ............. 65C to +150 C dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal (3) shutdown circuitry protects the device from permanent Recommended Operating Conditions damage. Supply Voltage V .............................2.5V to 6V IN 3) The device is not guaranteed to function outside of its Output Voltage V ...........................0.6V to 6V operating conditions. OUT 4) Measured on JESD51-7, 4-layer PCB. Operating Junct. Temp.......... -40 C to +125 C MP2105 Rev. 1.51 www.MonolithicPower.com 2 10/25/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP2151