XL317

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.

Applications

• Battery Chargers
• Post Regulation for Switching Supplies
• Constant-Current Regulators
• Microprocessor Supplies

Key features

• Adjustable Output Down to 1.2 V
• 100mA Output Current
• Capable of Handling up to 35V
• Line Regulation Typically 0.02%/V
• Load Regulation Typically 0.3% /A
• Current Limit Constant With Temperature
• Eliminates the Need to Stock Many Voltages
• Standard SOP8 Package
• 80-dB Ripple Rejection
• Output is Short-Circuit Protected