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