LM217L/LM317L

Application information

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Application information

The LM317L provides an internal reference voltage of 1.25V between the output and

adjustments terminals. This is used to set a constant current flow across an external resistor

obtain the previous requirement, all the regulator quiescent current is returned to the output

terminal, imposing a minimum load current condition. If the load is insufficient, the output

voltage will rise.

Since the LM317L is a floating regulator and "sees" only the input-to-output differential

voltage, supplies of very high voltage with respect to ground can be regulated as long as the

maximum input-to-output differential is not exceeded. Furthermore, programmable regulator

are easily obtainable and, by connecting a fixed resistor between the adjustment and output,

the device can be used as a precision current regulator. In order to optimize the load

provide remote ground sensing.