LT8300 100V Micropower Isolated IN Flyback Converter with 150V/260mA Switch Fea T Descrip T n 6V to 100V Input Voltage Range The LT 8300 is a micropower high voltage isolated flyback n 260mA, 150V Internal DMOS Power Switch converter. By sampling the isolated output voltage directly n Low Quiescent Current: from the primary-side flyback waveform, the part requires 70A in Sleep Mode no third winding or opto-isolator for regulation. The output 330A in Active Mode voltage is programmed with a single external resistor. In- n Boundary Mode Operation at Heavy Load ternal compensation and soft-start further reduce external n Low-Ripple Burst Mode Operation at Light Load component count. Boundary mode operation provides a n Minimum Load <0.5% (Typ) of Full Output small magnetic solution with excellent load regulation. n V Set with a Single External Resistor Low ripple Burst Mode operation maintains high efficiency OUT n No Transformer Third Winding or Opto-Isolator at light load while minimizing the output voltage ripple. Required for Regulation A 260mA, 150V DMOS power switch is integrated along n Accurate EN/UVLO Threshold and Hysteresis with all high voltage circuitry and control logic into a 5-lead n Internal Compensation and Soft-Start ThinSOT package. n 5-Lead TSOT-23 Package The LT8300 operates from an input voltages range of 6V to 100V and can deliver up to 2W of isolated output power. The high level of integration and the use of boundary a T and low ripple burst modes result in a simple to use, low n Isolated Telecom, Automotive, Industrial, Medical component count, and high efficiency application solution Power Supplies for isolated power delivery. n Isolated Auxiliary/Housekeeping Power Supplies L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5438499, 7463497, and 7471522. Typical a T 5V Micropower Isolated Flyback Converter Efficiency vs Load Current 100 + V OUT 90 V IN V = 36V IN 5V 4:1 36V TO 72V 80 1mA TO 300mA 2.2F 300H 19H 70 V IN 47F V = 48V IN 1M V = 72V 60 IN LT8300 50 EN/UVLO SW V OUT 40 40.2k 210k 30 R FB 20 GND 10 8300 TA01a 0 0 50 100 150 200 250 300 LOAD CURRENT (mA) 8300 TA01b 8300f 1 EFFICIENCY (%) ion pplica ions pplica ion uresLT8300 a Te Maxi Mu M r a T p in c F T (Note 1) TOP VIEW SW (Note 2) ........................................................... 150V EN/UVLO 1 5 V IN V ......................................................................... 100V IN GND 2 EN/UVLO ................................................................... V IN R 3 4 SW FB R ...................................................... V 0.5V to V FB IN IN S5 PACKAGE Current into R ................................................... 200A FB 5-LEAD PLASTIC TSOT-23 T = 150C, = 150C/W Operating Junction Temperature Range (Notes 3, 4) JMAX JA LT8300E, LT8300I ............................. 40C to 125C LT8300H ............................................ 40C to 150C LT8300MP ......................................... 55C to 150C Storage Temperature Range .................. 65C to 150C o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT8300ES5 PBF LT8300ES5 TRPBF LTGFF 5-Lead Plastic TSOT-23 40C to 125C LT8300IS5 PBF LT8300IS5 TRPBF LTGFF 5-Lead Plastic TSOT-23 40C to 125C LT8300HS5 PBF LT8300HS5 TRPBF LTGFF 5-Lead Plastic TSOT-23 40C to 150C LT8300MPS5 PBF LT8300MPS5 TRPBF LTGFF 5-Lead Plastic TSOT-23 55C to 150C 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: