POWER LOSS (mW) LTC3104 2.6A Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter and 10mA LDO FEATURES DESCRIPTION n Ultralow Quiescent Current: 2.6A The LTC 3104 is a high efficiency, monolithic synchronous n Synchronous Rectification Efficiency Up to 95% step-down converter using a current mode architecture n Wide V Range: 2.5V to 15V capable of supplying 300mA of output current. The IN n Wide V Range: 0.6V to 13.8V LTC3104 includes an integrated, adjustable 10mA LDO OUT n 300mA Output Current to power noise sensitive functions. n User-Selectable Automatic Burst Mode Operation The LTC3104 offers two operational modes: automatic or Forced Continuous Operation Burst Mode operation and forced continuous mode allow- n Accurate and Programmable RUN Pin Threshold ing the user to optimize output voltage ripple, noise and n 1.2MHz Fixed Frequency PWM light load efficiency. With Burst Mode operation enabled, n Internal Compensation the typical DC input supply current at no load drops to n Power Good Status Output for V OUT 2.6A, maximizing the efficiency for light loads. Selec- n 10mA Adjustable LDO tion of forced continuous mode provides very low noise n Available in Thermally Enhanced 3mm 4mm constant frequency, 1.2MHz operation. 0.75mm, 14-Lead DFN and 16-Lead MSOP Packages Additionally, the LTC3104 includes an accurate RUN com- APPLICATIONS parator, thermal overload protection, a power good output and an integrated soft-start feature to guarantee that the n Remote Sensor Networks power system start-up is well controlled. n Distributed Power Systems L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks n Multicell Battery or SuperCap Regulator of Linear Technology Corporation. All other trademarks are the property of their respective n owners. Energy Harvesters n Portable Instruments n Low Power Wireless Systems TYPICAL APPLICATION Efficiency vs Output Current 100 100 3V TO 15V V BST 95 IN 22nF 10H ON 2.2V 90 SW RUN OFF 300mA 27pF 47F 85 1.78M LTC3104 FB 10 80 ON 665k RUNLDO PGOOD 75 OFF 70 MODE V INLDO 1.8V 65 1 V 10F LDO 10mA V = 3V IN 825k 60 V = 5V IN V FBLDO CC V = 10V 4.7F 55 IN GND 412k V = 15V IN 1F 50 0.1 3104 TA01a 0.0001 0.001 0.01 0.1 1 OUTPUT CURRENT (A) 3104 TA01b 3104fa 1 For more information www.linear.com/LTC3104 EFFICIENCY (%)LTC3104 ABSOLUTE MAXIMUM RATINGS (Note 1) V ............................................................. 0.3V to 18V Operating Junction Temperature Range IN SW ................................................ 0.3V to (V + 0.3V) (Notes 2, 3) ............................................ 40C to 125C IN FB, FBLDO .................................................... 0.3V to 6V Storage Temperature Range .................. 65C to 150C BST ........................................(SW 0.3V) to (SW + 6V) Lead Temperature (Soldering, 10 sec) V ........................................................ 0.3V to 17V MSE Only ..........................................................300C INLDO V ........................................................... 0.3V to 17V LDO RUN, MODE, RUNLDO ............................... 0.3V to V IN V , PGOOD ................................................. 0.3V to 6V CC PIN CONFIGURATION TOP VIEW TOP VIEW MODE 1 14 V INLDO NC 1 16 NC V 2 13 V IN LDO MODE 2 15 V INLDO SW 3 12 FBLDO V 3 14 V IN LDO 15 SW 4 17 13 FBLDO BST 4 11 FB GND BST 5 GND 12 FB GND 5 10 RUN GND 6 11 RUN RUNLDO 7 10 V CC RUNLDO 6 9 V CC PGOOD 8 9 NC PGOOD 7 8 NC MSE PACKAGE 16-LEAD PLASTIC MSOP DE PACKAGE T = 125C, = 40C/W, = 10C/W JMAX JA JC 14-LEAD (4mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB T = 125C, = 53C/W, = 10C/W JMAX JA JC EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB