The TS317L is adjus table 3-terminal positive voltage regulator capable of supplying in excess of 100mA over an output voltage r ange of 1.25 V to 37 V. This voltage regulator is exceptionally easy to use and require only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow-out proof. Besides replacing fixed regulators , the TS317L is useful in a wide variety of other applications. Since the regulator is "floating " and sees 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. Also, it makes an especially simple adjustable switching regulator, a programmable output regulator , or by connecting a fixed resistor between the adjus tment and output, the TS317L can be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping the adjustment ter minal to ground which programs the output to 1.25V where most loads draw little current.