KA7818ETU

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

The KA7818ETU is a three-terminal positive linear voltage regulator from the KA78XXE series, manufactured by onsemi. It provides a fixed output voltage of 18 V with a maximum output current of 1 A and an output tolerance of ±4%. The device operates within an input voltage range of 21 V to 33 V and supports a junction temperature range of -40°C to +125°C. It features internal thermal overload protection, short-circuit protection, and safe operating area (SOA) protection. The component is housed in a TO-220 package.

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

• Integrated thermal overload protection prevents damage during overheating conditions.
• Built-in short-circuit protection safeguards the device against output faults.
• Safe operating area (SOA) protection ensures stability under varying load conditions.

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

• DC power supply regulation
• Local card regulation for electronic circuits
• General-purpose positive voltage regulation

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

Verify the specific ordering suffix 'ETU' corresponds to the TO-220 rail-packaged variant as defined in official documentation. Confirm that the part number prefix aligns with current onsemi nomenclature standards following Fairchild Semiconductor integration. Ensure compliance with RoHS directives if required for the target application environment.

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

Select this component when a fixed 18 V output at up to 1 A is required. The wide operating temperature range makes it suitable for industrial environments. Verify that the input voltage remains within the specified 21 V to 33 V window to maintain regulation. Consider thermal management requirements given the power dissipation capabilities of the TO-220 package.

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

This regulator belongs to the KA78XXE family of three-terminal positive voltage regulators. The series offers multiple fixed output voltages including 5, 6, 8, 9, 10, 12, 15, 18, and 24 V. These devices are designed primarily for fixed-voltage applications but can be adapted for adjustable outputs using external components.

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

KA7818E

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

What is the maximum input voltage for the KA7818ETU?

The absolute maximum input voltage rating is 35 V.

Does the KA7818ETU include protection features?

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