LT3511IMS#PBF

LT3511IMS#PBF 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. The LT3511 operates from an input voltage range of 4.5V to 100V and delivers up to 2.5W 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. Applications include isolated telecom power supplies, isolated auxiliary/housekeeping power supplies, isolated industrial, automotive and medical power supplies.

• Boundary mode operation
• No transformer third winding or opto-isolator required for regulation
• Improved primary-side winding feedback load regulation
• VOUT set with two external resistors, no external start-up resistor
• BIAS pin for internal bias supply and power switch driver
• Quiescent current is 2.7mA typical at (not switching, TA = 25°C)
• Switch VCESAT is 0.3V typical at (ISW = 100mA, TA = 25°C)
• Maximum switching frequency is 650KHz typical at (TA = 25°C)
• Error amplifier voltage gain is 150V/V typical at (TA = 25°C)
• Operating junction temperature range from -40°C to 125°C, 16-lead plastic MSOP package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party