KA7818E

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

The KA7818E is a three-terminal positive linear voltage regulator manufactured by onsemi. It provides a fixed output voltage of 18 V with a maximum output current of 1 A. The device operates within an input voltage range of 21 V to 33 V and supports junction temperatures from -40°C to +125°C. Electrical characteristics include a line regulation of up to 360 mV, load regulation of up to 360 mV, and a dropout voltage of 2 V at 1 A. The component is housed in a TO-220 package.

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

• Integrated thermal overload protection for safe operation under high temperature conditions
• Internal short-circuit protection limits current during fault events
• Output transistor safe operating area protection prevents damage during transient loads

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

• DC power supply circuits requiring stable 18 V rails
• Local voltage regulation for printed circuit boards
• General-purpose power management in industrial equipment

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

Verify the specific ordering suffix (ETU) against the manufacturer's current catalog to confirm package type and availability status. Confirm that the requested revision matches the required electrical specifications. Check for any recent part number changes resulting from corporate integrations or system updates before finalizing procurement orders.

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

Select this component when a fixed 18 V output is required with up to 1 A load capacity. Ensure the input voltage remains between 21 V and 33 V to maintain regulation. Verify that the thermal design accommodates the junction-to-air resistance for the expected ambient temperature and power dissipation levels.

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

This device belongs to the KA78XXE series of three-terminal positive regulators. The series offers multiple fixed output voltages including 5, 6, 8, 9, 10, 12, 15, 18, and 24 V. These regulators are designed for general-purpose applications where reliable voltage regulation is essential.

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

KA7818ETU

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

What is the maximum input voltage for the KA7818E?

The absolute maximum input voltage is 35 V.

Does the KA7818E include protection features?

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