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Datasheet Linear Technology LT3575IFE#PBF

Linear Technology LT3575IFE#PBF

Manufacturer:Linear Technology
Series:LT3575
Part Number:LT3575IFE#PBF

Isolated Flyback Converter without an Opto-Coupler

Datasheets

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    LT3575 Isolated Flyback Converter without an Opto-Coupler FEATURES DESCRIPTION
    The LT3575 is a monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or optoisolator is required for regulation. The part senses the isolated output voltage directly from the primary side flyback waveform. A 2.5A, 60V NPN power switch is integrated along with all control logic into a 16-lead TSSOP package. The LT3575 operates with input supply voltages from 3V to 40V, and can deliver output power up to 14W with no external power switch.The LT3575 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation. The output voltage is easily set with two external resistors and the transformer turns ratio. Off the shelf transformers are available for many applications.
    L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and No RSENSE and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. 3V to 40V Input Voltage Range 2.5A, 60V Integrated NPN Power Switch Boundary Mode Operation No Transformer Third Winding or Optoisolator Required for Regulation Improved Primary-Side Winding Feedback Load Regulation VOUT Set with Two External Resistors BIAS Pin for Internal Bias Supply and Power NPN Driver Programmable Soft-Start Programmable Power Switch Current Limit Thermally Enhanced 16-Lead TSSOP APPLICATIONS
    n Industrial, Automotive and Medical Isolated Power Supplies TYPICAL APPLICATION
    5V Isolated Flyback Converter
    VIN 12V TO 24V 10F 357k VIN SHDN/UVLO 51.1k 80.6k LT3575 TC RILIM SS VC 28.7k 10k 10nF GND SW TEST BIAS
    2 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 IOUT (A)
    3575 TA01b Load Regulation
    1 0.22F 1k 24H 3:1 2.6H 47F VOUT OUTPUT VOLTAGE ERROR (%) VOUT 5V, 1.4A + VIN = 24V 0 VIN = 12V RFB RREF 6.04k 1 11.5k 4.7nF
    3575 TA01 4.7F 3575f 1 LT3575 ABSOLUTE MAXIMUM RATINGS
    SW .60V VIN , SHDN/UVLO, RFB, BIAS .40V SS, VC , TC, RREF , RILIM .5V Maximum Junction Temperature . 125C Operating Junction Temperature Range (Note 2) LT3575E, LT3575I . 40C to 125C Storage Temperature Range . 65C to 150C PIN CONFIGURATION
    TOP VIEW NC VIN SW SW BIAS SHDN/UVLO SS RILIM 1 2 3 4 5 6 7 8 17 GND 16 NC 15 NC 14 GND 13 TEST 12 TC 11 RREF 10 RFB 9 VC FE PACKAGE 16-LEAD PLASTIC TSSOP TJMAX = 125C, JA = 38C/W, JC = 10C/W EXPOSED PAD (PIN 17) IS GND, MUST BE CONNECTED TO GND ORDER INFORMATION
    LEAD FREE FINISH LT3575EFE#PBF LT3575IFE#PBF TAPE AND REEL LT3575EFE#TRPBF LT3575IFE#TRPBF PART MARKING* 3575FE 3 ...

Manufacturer's Classification

Power Management > Switching Regulator > Flyback, Forward and Isolated Controllers

Other Names: LT3575IFEPBF, LT3575IFE PBF

Docket:
LT3575 Isolated Flyback Converter without an Opto-Coupler FEATURES DESCRIPTION
The LT3575 is a monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or optoisolator is required for regulation. The part senses the isolated output voltage directly from the primary side flyback waveform. A 2.5A, 60V NPN power switch is integrated along with all control logic into a 16-lead TSSOP package. The LT3575 operates with input supply voltages from 3V to 40V, and can deliver output power up to 14W with no external power switch.The LT3575 utilizes boundary mode operation to provide a small magnetic ...

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