The LM317F3 is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 1.5 A over an output voltage range of 1.2 V to 37 V. It is exceptionally easy to use and requires only two external resistors to set the output voltage. Furthermore, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blowout proof. The LM317F3 serves a wide variety of applications including local, on card regulation. This device is also suitable for use in precision current regulators, as well as providing an adjustable power supply.

Applications:

• Adjustable Power Supplies
• Battery Chargers
• Precision Current Regulators
• Benchtop Power Supplies
• Post Regulation for Switching Supplies

Features:

• Adjustable Output Voltage: 1.2 V to 37 V
• Guaranteed 1.5 A Output Current
• Line Regulation Typically 0.01%/V
• Load Regulation Typically 0.1%
• Current Limit Constant with Temperature
• Eliminates Stocking Many Fixed Voltages
• Standard 3-Terminal Transistor Package

Benefits:

• Simplified circuit design due to minimal external components.
• Protection against overload conditions due to internal current limiting, thermal shutdown and safe area compensation.
• Versatile usage in both voltage and current regulation applications.
• Reduced component count and cost in adjustable power supply designs.
• Improved system reliability and robustness.

Technical Specifications:

The LM317F3 has a typical line regulation of 0.01%/V and load regulation of 0.1%. It is available in a TO-220 package and operates over a wide temperature range. The device can handle an input voltage of up to 40V and provides short-circuit protection. The output voltage is adjustable using two external resistors, allowing for precise voltage setting. Its operating junction temperature range is from 0°C to +125°C.