FEATURES
s s DESCRIPTION
The LT ®1425 is a monolithic high power switching regulator specifically designed for the isolated flyback topology. No “third winding” or optoisolator 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. The LT1425 has a number of features not found on other switching regulator ICs. Its unique control circuitry can maintain regulation well into discontinuous mode in most applications. Optional load compensation circuitry allows for improved load regulation. An externally activated shutdown mode reduces total supply current to 15µA for standby operation. s s s s s s No Transformer “Third Winding” or Optoisolator Required ± 5% Accurate Output Voltage Without User Trims (See Circuit Below) Resistor Programmable Output Voltage Regulation Maintained Well Into Discontinuous Mode...
Linear Technology
