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 synchro- n Synchronous Rectification: Efficiency Up to 95% nous step-down converter using a current mode archi- n Wide V Range: 2.5V to 15V tecture 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 and an integrated soft-start feature to guarantee that the APPLICATIONS power system start-up is well controlled. n Remote Sensor Networks All registered trademarks and trademarks are the property of their respective owners. n Distributed Power Systems n 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 27pF 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 Rev. B 1 Document Feedback For more information www.analog.com 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 GND 2 SW 2 9 GND 11 11 BST 3 8 FB BST 3 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 10-Lead (3mm 3mm) Plastic DFN 40C to 125C 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 Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at T = 25C (Note 2). V = 10V unless otherwise noted. A IN PARAMETER CONDITIONS MIN TYP MAX UNITS Step-Down Converter l Input Voltage Range 2.6 15 V l After Start-Up 2.5 V l Input Undervoltage Lockout Threshold V Rising 2.1 2.6 V IN V Rising, T = 0C to 85C (Note 4) 2.1 2.5 V IN J Input Undervoltage Lockout Hysteresis (Note 4) 0.4 V Rev. B 2 For more information www.analog.com