LT8300 100V Micropower Isolated Flyback IN Converter with 150V/260mA Switch FEATURES DESCRIPTION n 6V to 100V Input Voltage Range The LT 8300 is a micropower high voltage isolated fly- n 260mA, 150V Internal DMOS Power Switch back converter. By sampling the isolated output voltage n Low Quiescent Current directly from the primary-side flyback waveform, the part n 70A in Sleep Mode requires no third winding or opto-isolator for regulation. n 330A in Active Mode The output voltage is programmed with a single exter- n Boundary Mode Operation at Heavy Load nal resistor. Internal compensation and soft-start further n Low-Ripple Burst Mode Operation at Light Load reduce external component count. Boundary mode opera- n Minimum Load <0.5% (Typ) of Full Output tion provides a small magnetic solution with excellent load n V Set with a Single External Resistor regulation. Low ripple Burst Mode operation maintains OUT n No Transformer Third Winding or Opto-Isolator high efficiency at light load while minimizing the output Required for Regulation voltage ripple. A 260mA, 150V DMOS power switch is n Accurate EN/UVLO Threshold and Hysteresis integrated along with all high voltage circuitry and control n Internal Compensation and Soft-Start logic into a 5-lead ThinSOT package. n 5-Lead TSOT-23 Package The LT8300 operates from an input voltages range of 6V n AEC-Q100 Qualified for Automotive Applications to 100V and can deliver up to 2W of isolated output power. The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low APPLICATIONS component count, and high efficiency application solution n Isolated Telecom, Automotive, Industrial, Medical for isolated power delivery. Power Supplies All registered trademarks and trademarks are the property of their respective owners. Protected n Isolated Auxiliary/Housekeeping Power Supplies by U.S. Patents, including 5438499, 7463497, and 7471522. TYPICAL APPLICATION 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 Rev. A 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LT8300 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (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 Operating Junction Temperature Range (Notes 3, 4) T = 150C, = 150C/W JMAX JA LT8300E, LT8300I ............................. 40C to 125C LT8300H ............................................ 40C to 150C LT8300MP ......................................... 55C to 150C Storage Temperature Range .................. 65C to 150C ORDER INFORMATION 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 AUTOMOTIVE PRODUCTS** LEAD FREE FINISH TAPE AND REEL TAPE AND REEL MINI PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT8300ES5 WPBF LT8300ES5 WTRPBF LT8300ES5 WTRMPBF LTGFF 5-Lead Plastic TSOT-23 40C to 125C LT8300IS5 WPBF LT8300IS5 WTRPBF LT8300IS5 WTRMPBF LTGFF 5-Lead Plastic TSOT-23 40C to 125C LT8300HS5 WPBF LT8300HS5 WTRPBF LT8300HS5 WTRMPBF LTGFF 5-Lead Plastic TSOT-23 40C to 150C 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. **Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for thesemodels. Rev. A 2 For more information www.analog.com