Linear rolls monolithic flyback regulator

CALIFORNIA, USA: Linear technology has introduced the LT8300 which is a low quiescent current monolithic flyback regulator that simplifies the design of an isolated DC/DC converter. As the output voltage is detected from the primary-side flyback signal, no optocoupler, third winding or signal transformer are required for feedback.

The LT8300 operates over a 6V to 100V input voltage range, has a 260mA, 150V power switch and delivers up to 2 watts of output power and can be used for a wide variety of telecom, datacom, automotive, industrial and medical applications.

The LT8300 operates in a boundary mode, a current-mode control switching scheme, resulting in better than +/-5 per cent regulation over the full line, load and temperature range. Boundary mode, also known as critical conduction mode (CCM), permits the use of a smaller transformer compared to equivalent continuous conduction mode designs.

 Low output ripple Burst Mode operation maintains high efficiency and helps extend battery run times at light load with its low quiescent current. The output voltage is easily set by a single external resistor and the transformer turns ratio. Several transformers identified in the data sheet can be used for numerous applications. Additional features include power, internal soft-start and adjustable undervoltage lockout. The high level of integration results in a simple, low component count, tightly regulated solution ideal for isolated power delivery.

The LT8300 is available in a small 5-lead ThinSOT  package. Extended and industrial versions operate over a junction temperature range from -40 degree centigrade to 125 degree centigrade.