The XL317 is an adjustable positive voltage regulator capable of supplying 100 mA over a 1.2V to 32V output range. The XL317 is easy to use and requires only two external resistors to set the output voltage. Both line and load regulation are better than standard fixed regulators. The XL317 is available SOP8 package.
The XL317 offers full overload protection. Included on the chip are current limit, thermal overload protection, and safe area protection. Normally, no capacitors are required unless the device is situated more than 6 inches from the input filter capacitors, in which case an input bypass is required.
The XL317 uses floating topology and sees only the input-to-output differential voltage, therefore supplies of dozens volts can be regulated, provided the maximum input-to-output differential is not exceeded. The device makes a simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the XL317 can be used as a precision current regulator.
