ANALOG DEVICES LT1424IS8-5#PBF DC-DC Switching Isolated Flyback Regulator, Fixed, 3V to 20V in, 5V out, 0.4A out, NSOIC-8

LT1424-5 is a monolithic high power switching regulator specifically designed for the isolated flyback topology. No �third winding� or opt isolator is required; the integrated circuit senses the isolated output voltage directly from the primary side flyback waveform. A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry. It can deliver up to 400mA at 5V with no external power devices. By utilizing current mode switching techniques, it provides excellent AC and DC line regulation. It has a number of features not found on other switching regulator ICs. Its unique control circuitry can maintain regulation well into discontinuous mode. Load compensation circuitry allows for improved load regulation. It is used in application such as isolated communication supplies, industrial automation, instrumentation systems etc.

• Designed for use with 1:1 ratio transformers
• Fixed, application specific 5V output voltage
• Regulation maintained well into discontinuous mode (light load)
• Load compensation provides excellent load regulation
• Operating frequency is 285KHz typical
• Supply current is 7mA typical
• Synchronization range is 330KHz to 450KHz
• Operating junction temperature is -40°C to 125°C
• Package style is 8-lead NSOIC

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