LM1086ISX-5.0/NOPB

The LM1086 is a regulator with a maximum dropout
of 1.5 V at 1.5 A of load current. The device has the
same pin-out as TI’s industry standard LM317.
Two resistors are required to set the output voltage of
the adjustable output voltage version of the LM1086.
Fixed output voltage versions integrate the adjust
resistors. Typically, no input capacitor is needed
unless the device is situated more than 6 inches from
the input filter capacitors. Output capacitor can be
replaced with ceramic and appropriate ESR.
The LM1086 circuit includes a zener trimmed
bandgap reference, current limiting, and thermal
shutdown. Because the LM1086 regulator is floating
and detects only the input-to-output differential
voltage, supplies of several hundred volts can be
regulated as long as the maximum input-to-output
differential is not exceeded. Exceeding the maximum
input-to-output deferential will result in short-circuiting
the output. By connecting a fixed resistor between the
adjustment pin and output, the LM1086 can be also
used as a precision current regulator.
For applications requiring greater output current, refer
to LM1084 (clickable link) for the 5-A version, and
the LM1085 (clickable link) for the 3-A version.