LT3512EMS#PBF

LT3512 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform. It operates from an input voltage range of 4.5V to 100V and delivers upto 4.5W of isolated output power. Two external resistors and the transformer turns ratio easily set the output voltage. Off-the-shelf transformers are available for several applications. The high level of integration and the use of boundary mode operation results in a simple, clean, tightly regulated application solution to the traditionally tough problem of isolated power delivery. It is widely used in application such as isolated telecom power supplies, isolated auxiliary/housekeeping power supplies, isolated industrial, automotive and medical power supplies etc.

• Improved primary-side winding feedback load regulation
• VOUT set with two external resistors
• BIAS pin for internal bias supply and power switch driver
• No external start-up resistor
• Maximum current limit is 600mA typical at (TA = 25°C. VIN = 24V)
• Quiescent current is 3.5mA typical at (not switching, TA = 25°C. VIN = 24V)
• Switch VCESAT is 0.5V typical at (ISW = 200mA)
• Error amplifier voltage gain is 150V/V typical at (TA = 25°C. VIN = 24V)
• Operating junction temperature is -40°C to 125°C
• Package style is 16-lead plastic MSOP

Notes

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