LT1424-9

Supply Voltage...............................................20V
Switch Voltage...............................................35V
SHDN, SYNC Pin Voltage..................................7V
Operating Junction Temperature Range
Commercial...................................... 0 to 125
Industrial...................................... -40 to 125
Storage Temperature Range.........-65 to 150
Lead Temperature (Soldering, 10 sec)........300

 The LT^® 1424-9 is a monolithic high power switching regulator specifically designed for the isolated flyback topology. No "third winding"± or optoisolator is require 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 LT1424-9 operates with input supply voltages from 3V to 20V and draws only 7mA quiescent current. It can deliver up to 200mA at 9V with no external power devices. By utilizing current mode switching techniques, it pro-vides excellent AC and DC line regulation.

The LT1424-9 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 regula-tion. An externally activated shutdown mode reduces total supply current to 20A typical for standby operation.