KA7918TU

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

The KA7918TU is a three-terminal negative voltage regulator from the KA79XX series by ON Semiconductor. It provides a fixed output voltage of -18 V with a maximum output current exceeding 1 A. The device operates within an ambient temperature range of 0 to +125 °C and utilizes a TO-220 package. Key electrical characteristics include a typical quiescent current of 6 mA, a dropout voltage of 2 V at 1 A load, and ripple rejection of 60 dB at 120 Hz.

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

• Internal thermal overload protection prevents damage during overheating conditions.
• Integrated short-circuit protection limits current flow during fault events.
• Output transistor safe operating area compensation ensures stability under varying loads.

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

• Negative fixed output power supply circuits
• Split power supply systems requiring dual polarity rails

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

Verify the specific part number against the manufacturer's official ordering information to confirm availability and updated nomenclature following corporate integrations. Ensure compliance with all applicable safety standards and verify that the component is not utilized in unauthorized life support or medical implant applications as per the manufacturer's disclaimer.

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

Select this component for designs requiring a stable negative rail near -18 V. Ensure the input voltage remains within the absolute maximum rating of -35 V while maintaining sufficient headroom above the dropout voltage. Consider the thermal resistance values when designing heat dissipation strategies for continuous operation at high currents.

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

This regulator belongs to the KA79XX family of three-terminal negative voltage regulators. The series offers various fixed output voltages including -5 V, -6 V, -8 V, -9 V, -12 V, -15 V, -18 V, and -24 V. These devices are designed for general-purpose regulation tasks where reliable performance and built-in protection features are required.

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

LM7918CT

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

What is the maximum input voltage allowed for the KA7918TU?

The absolute maximum input voltage rating is -35 V.

Does the KA7918TU include protection against short circuits?

Yes, the device incorporates internal short-circuit protection circuitry.