LTC3426 1.2MHz Step-Up DC/DC Converter in SOT-23 FEATURES DESCRIPTIO Internal 2A MOSFET Switch The LTC 3426 step-up switching regulator generates an 1.2MHz Switching Frequency output voltage of up to 5.5V from an input voltage as low Integrated Soft-Start as 1.6V. Ideal for applications where space is limited, it Low 1.6V V Operation switches at 1.2MHz, allowing the use of tiny, low cost and IN Low R Switch: 100m at 5V Output low profile external components. Its internal 2A, 100m DS(ON) Delivers 5V at 800mA from a 3.3V Input NMOS switch provides high efficiency even at heavy load, Delivers 3.3V at 800mA from a 2.5V Input while the constant frequency, current mode architecture Uses Small, Low Profile External Components results in low, predictable output noise that is easy to filter. TM Low Profile (1mm) SOT-23 (ThinSOT ) Package Antiringing circuitry reduces EMI concerns by damping U the inductor while in discontinuous mode, and internal APPLICATIO S soft-start eases inrush current worries. Internal frequency White LED Driver Supply compensation is designed to accommodate ceramic out- Local 3.3V or 5V Supply put capacitors, further reducing noise. The device features Battery Back-Up very low shutdown current of 0.5A. The LTC3426 is available in the 6-lead SOT-23 package. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6498466, 6611131 TYPICAL APPLICATIO 3.3V to 5V Boost Converter Efficiency 100 2.2H V = 3.3V IN V IN 95 V = 5V OUT 3.3V 90 SW V OUT 85 V V 5V IN OUT 800mA 80 10F LTC3426 75 22F OFF ON SHDN FB 70 GND 65 60 3426 TA01 55 50 1 10 100 1000 LOAD CURRENT (mA) 3426 TA01b 3426fa 1 EFFICIENCY (%) U ULTC3426 UUW O ABS LUTEXAI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) V Voltage ................................................. 0.3V to 6V TOP VIEW IN SW Voltage .................................................. 0.3V to 6V SW 1 6 V IN SHDN, FB Voltage ....................................... 0.3V to 6V GND 2 5 V OUT V ........................................................... 0.3V to 6V FB 3 4 SHDN OUT Operating Temperature Range (Note 2) .. 40C to 85C S6 PACKAGE 6-LEAD PLASTIC TSOT-23 Storage Temperature Range ................. 65C to 125C T = 125C, = 165C/W, = 102C/W JMAX JA JC Lead Temperature (Soldering, 10 sec)................ 300C ORDER PART NUMBER S6 PART NUMBER LTC3426ES6 LTAJT Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: