KA317

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The KA317 is a monolithic 3-terminal positive adjustable voltage regulator designed to supply more than 1.5 A of load current. The output voltage is continuously adjustable over a range from 1.2 V to 37 V using only two external resistors. It incorporates internal thermal overload protection, short-circuit current limiting, and output-transistor safe operating area compensation. The device operates with an input-output voltage differential up to 40 V and maintains regulation across a junction temperature range of 0°C to +125°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Adjustable output voltage capability spanning 1.2 V to 37 V
• Internal thermal overload protection circuitry
• Integrated short-circuit current limiting function
• Output-transistor safe operating area compensation

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Local on-card regulation for power distribution systems
• Programmable output regulators
• Precision test and measurement equipment power supplies

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix (e.g., TU) against the manufacturer's official database to confirm package type and packing method. Confirm that the part number aligns with ON Semiconductor nomenclature standards following the Fairchild integration, as underscore characters in legacy designations may have been replaced by dashes.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a robust linear regulator capable of handling high currents is required. Ensure the application provides sufficient heat sinking, as power dissipation is internally limited but dependent on ambient conditions. Verify that the input-to-output voltage differential remains within the specified maximum limits to maintain stable operation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This device belongs to the family of 3-terminal positive adjustable regulators, sharing functional similarities with the LM317. It is manufactured by ON Semiconductor, which acquired Fairchild Semiconductor. The KA317TU variant utilizes a TO-220 package suitable for through-hole mounting and high-power applications requiring effective thermal management.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

LM317T

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the minimum load current required to maintain regulation?

A minimum load current of 3.5 mA to 12.0 mA is required to maintain regulation when the input-output voltage differential is 40 V.

How does the device handle overload conditions?

The KA317 includes internal thermal overload protection and short-circuit current limiting to protect the device during fault conditions.