KA7805ETU

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

The KA7805ETU is a three-terminal positive linear voltage regulator from the KA78XXE series, manufactured by ON Semiconductor. It provides a fixed output voltage of 5 V with a tolerance of ±4%. The device supports an output current up to 1 A and operates within an extended temperature range of -40°C to +125°C. It is housed in a TO-220 package with dual gauge pins and utilizes rail parking. Key electrical specifications include a maximum input voltage of 35 V, a typical quiescent current of 8 mA, and a dropout voltage of 2 V at 1 A load.

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

• Integrated thermal overload protection prevents damage during overheating conditions.
• Built-in short-circuit protection limits current flow to safeguard the device and circuit.
• Output transistor safe operating area protection ensures stability under varying load conditions.

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

• DC-to-DC conversion for power supply regulation
• Local regulation for distributed power systems
• Pre-regulator stages for switching regulators

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

Verify the specific ordering suffix ETU corresponds to the TO-220 package with dual gauge pins and rail parking method. Confirm that the E-series designation indicates the extended temperature range of -40°C to +125°C rather than the commercial grade. Ensure compatibility with the required output voltage tolerance of ±4% for the target application environment.

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

Select this component when a fixed 5 V output is required with high reliability features such as thermal and short-circuit protection. The extended temperature range makes it suitable for industrial environments where ambient temperatures may drop below freezing. Consider the TO-220 package size and thermal resistance characteristics for adequate heat dissipation design.

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

This part belongs to the KA78XXE/KA78XXAE family of three-terminal positive regulators originally developed by Fairchild Semiconductor and now managed by ON Semiconductor following integration. The series offers various fixed output voltages including 5, 6, 8, 9, 10, 12, 15, 18, and 24 V options across different packages like TO-220 and D-PAK.

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

KA7805AETU (Commercial grade, 0°C to +125°C)

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

What is the maximum input voltage for the KA7805ETU?

The absolute maximum input voltage is 35 V for output voltages ranging from 5 V to 18 V.

Does the KA7805ETU include internal protection circuits?

Yes, it includes internal current limiting, thermal shut-down, and safe operating area protection.