POWER LOSS (mW) LTC3103 1.8A Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter FEATURES DESCRIPTION n Ultralow Quiescent Current: 1.8A The LTC 3103 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. IN n Wide V Range: 0.6V to 13.8V OUT The LTC3103 offers two operational modes: automatic n 300mA Output Current Burst Mode operation and forced continuous mode allow- n User-Selectable Automatic Burst Mode or Forced ing the user the ability to optimize output voltage ripple, Continuous Operation noise and light load efficiency. With Burst Mode operation n Accurate and Programmable RUN Pin Threshold enabled, the typical DC input supply current at no load n 1.2MHz Fixed Frequency PWM drops to 1.8A maximizing the efficiency for light loads. n Internal Compensation Selection of forced continuous mode provides very low n Power Good Status Output for V OUT noise constant frequency, 1.2MHz operation. n Available in Thermally Enhanced 3mm 3mm Additionally, the LTC3103 includes an accurate RUN com- 0.75mm, 10-Pin DFN and 10-Pin MSOP Packages parator, thermal overload protection, a power good output APPLICATIONS and an integrated soft-start feature to guarantee that the power system start-up is well controlled. n Remote Sensor Networks L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks n Distributed Power Systems of Linear Technology Corporation. All other trademarks are the property of their respective n owners. Multicell Battery or SuperCap Regulator n Energy Harvesters n Portable Instruments n Low Power Wireless Systems TYPICAL APPLICATION Efficiency vs Output Current 100 3V TO 15V V BST 100 IN 95 0.022F 10H 2.2V 90 MODE SW 300mA LTC3103 85 RUN PGOOD 80 10 10F 1.78M 75 V FB CC 12pF GND 70 47F 65 1 1F 665k V = 3V IN 60 V = 5V IN 3103 TA01a V = 10V 55 IN V = 15V IN 50 0.1 0.0001 0.001 0.01 0.1 1 OUTPUT CURRENT (A) 3103 TA01b 3103f 1 EFFICIENCY (%)LTC3103 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 ................................................................ 0.3V to 6V Storage Temperature Range .................. 65C to 150C BST ........................................(SW 0.3V) to (SW + 6V) Lead Temperature (Soldering, 10 sec) RUN, MODE ............................................... 0.3V to V MSE Only ..........................................................300C IN V , PGOOD ................................................. 0.3V to 6V CC PIN CONFIGURATION TOP VIEW TOP VIEW V 1 10 MODE IN V 1 10 MODE IN SW 9 NC 2 SW 2 9 NC 11 11 BST 3 FB BST 3 8 FB 8 GND GND GND 4 7 RUN 4 GND 7 RUN PGOOD 5 6 V CC PGOOD 5 6 V CC MSE PACKAGE 10-LEAD PLASTIC MSOP DD PACKAGE T = 125C, = 40C/W, = 5.0C/W JMAX JA JC 10-LEAD (3mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB T = 125C, = 58C/W, = 10C/W JMAX JA JC EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3103EDD PBF LTC3103EDD TRPBF LFXH 40C to 125C 10-Lead (3mm 3mm) Plastic DFN LTC3103IDD PBF LTC3103IDD TRPBF LFXH 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3103EMSE PBF LTC3103EMSE TRPBF LTFXJ 10-Lead Plastic MSOP 40C to 125C LTC3103IMSE PBF LTC3103IMSE TRPBF LTFXJ 10-Lead Plastic MSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: