POWER LOSS (mW) LT8335 Low I Boost/SEPIC/ Q Inverting Converter with 2A, 28V Switch FEATURES DESCRIPTION n 3V to 25V Input Voltage Range The LT 8335 is a current mode DC/DC converter capable n Ultralow Quiescent Current and Low Ripple Burst of generating either positive or negative output voltages Mode Operation: I = 6A using a single feedback pin. It can be configured as a Q n 2A, 28V Power Switch boost, SEPIC or inverting converter consuming as low as n Positive or Negative Output Voltage Programming 6A of quiescent current. Low ripple Burst Mode opera- with a Single Feedback Pin tion maintains high efficiency down to very low output n Fixed 2MHz Switching Frequency currents while keeping the output ripple below 15mV in n Programmable Undervoltage Lockout (UVLO) a typical application. The internally compensated current n Internal Compensation and Soft-Start mode architecture results in stable operation over a wide n Low Profile (0.75mm) 8-Lead (3mm 2mm) DFN range of input and output voltages. Integrated soft-start Package and frequency foldback functions are included to control inductor current during start-up. The 2MHz operation combined with the small 8-lead DFN package, enables APPLICATIONS low cost, area efficient solutions. n L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks Industrial and Automotive and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the n Telecom property of their respective owners. n Medical Diagnostic Equipment n Portable Electronics TYPICAL APPLICATION 3V to 6V Input, 12V Boost Converter Efficiency and Power Loss 100 1000 1.2H V IN V OUT 90 3V TO 6V 12V 275mA AT V = 3V 4.7F 80 800 IN 22F EFFICIENCY 440mA AT V = 5V IN V SW IN 520mA AT V = 6V 70 IN EN/UVLO GND 60 600 LT8335 1M 4.7pF 50 POWER LOSS FBX 40 400 INTV CC 154k 30 1F 20 200 V = 3V IN V = 5V IN 10 8335 TA01 V = 6V IN 0 0 0 100 200 300 400 500 600 LOAD CURRENT (mA) 8335 TA01b 8335f 1 For more information www.linear.com/LT8335 EFFICIENCY (%)LT8335 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW SW ............................................................................28V V , EN/UVLO ............................................................25V IN FBX 1 8 EN/UVLO EN/UVLO Pin Above V Pin ........................................6V NC 2 7 INTV IN 9 CC GND INTV (Note 2) ..........................................................4V SW 3 6 V IN CC SW 4 5 GND FBX ...........................................................................4V Operating Junction Temperature (Note 3) DDB PACKAGE LT8335E, LT8335I ............................. 40C to 125C 8-LEAD (3mm 2mm) PLASTIC DFN Storage Temperature Range .................. 65C to 150C = 80.5C/W JA EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION