The ISL6719 is a low cost linear regulator for generating a low

voltage bias supply from intermediate distributed voltages

commonly used in telecom and datacom applications. It

provides a single adjustable output rated at 100mA from

either the input source or an auxiliary source such as a

transformer winding. The auxiliary source is selected whenever

it has sufficient voltage to sustain the output.

The ISL6719 may be used as a start-up or a continuous low

power regulator. When operating as a start-up regulator, it is

capable of sourcing 100mA from a 100V source for short

durations. This period of time allows the power supply to

start-up and provide an alternate power source, such as the

output of a transformer winding, to the AUXIN input. This

allows the regulated output to operate from a lower source

voltage to minimize power loss.

Features

• 100V+ input capability

• Adjustable output from 1.5V to 20V

• Up to 100mA output current

• Overcurrent protection

• Over-temperature protection

• ENABLE and ENABLE_N inputs

• Package compliant with IPC2221A, creepage and clearance

spacing requirements

Applications

• Telecom/datacom DC/DC converters

• Low power bias supplies