KA78T15TU

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

The KA78T15TU is a monolithic fixed positive voltage regulator from the KA78Txx series, manufactured by onsemi. It provides a nominal output voltage of 15 V with a maximum output current capability exceeding 3.0 A. The device operates within an input voltage range up to 40 V and supports power dissipation up to 25 W. It features internal short-circuit current limiting and thermal overload protection. The component utilizes a TO-220 three-terminal through-hole package and functions across a junction temperature range of 0 °C to +125 °C.

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

• Integrated safe operating area (SOA) compensation for the output transistor
• Internal short circuit current limiting and thermal overload protection mechanisms
• Fixed output voltage configuration requiring no external components

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

• Power supply modules requiring regulated 15 V DC output
• Embedded systems utilizing high-current positive voltage rails
• Industrial equipment power distribution units

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

Verify the specific manufacturer origin, as the part was originally produced by Fairchild Semiconductor prior to integration into onsemi. Confirm that the ordering suffix corresponds to the standard TO-220 package variant. Ensure compliance with RoHS directives if required for the target assembly. Cross-reference datasheet revisions to confirm electrical characteristics match the intended design specifications.

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

Select this component when a fixed 15 V rail with over 3 A load capacity is required. The TO-220 package facilitates direct heatsinking for high power dissipation scenarios. Consider the dropout voltage requirements relative to the minimum input voltage available in the system. Evaluate thermal management needs given the 25 W internal power dissipation limit under full load conditions.

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

This regulator belongs to the KA78Txx family of three-terminal positive voltage regulators designed for heavy-duty applications. The 'T' designation indicates the higher current handling capability compared to standard linear regulators. The product line offers multiple fixed voltage options including 5 V, 12 V, and 15 V variants within the same physical footprint and pinout configuration.

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

MC78T15BTG

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

What is the maximum power dissipation rating?

The device has an internally limited power dissipation rating of 25 W.

Does the regulator require external capacitors?

No external components are required for basic operation, though bypass capacitors are recommended for optimum stability and transient response.