KA278RA05CYDTU

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

The KA278RA05CYDTU is a low-dropout voltage regulator from the KA278RXXC-Series, manufactured by onsemi. It provides a nominal 5 V output without adjustment and allows for an adjustable output range between 1.27 V and 32 V. The device supports up to 2 A of output current with a dropout voltage below 0.5 V at full rated current. It operates within a temperature range of -20°C to +80°C and features over-current protection, thermal shutdown, over-voltage protection, and short-circuit protection.

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

• Integrated over-current protection, thermal shutdown, over-voltage protection, and short-circuit protection
• Output disable function for power management control
• Low dropout voltage performance below 0.5 V at full-rated 2 A load

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

• Various electronic equipment requiring constant voltage power sources
• Systems utilizing TO-220F 4L lead full-mold package configurations
• Applications requiring adjustable or fixed 5 V regulation with high current capability

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

Verify the specific ordering suffix 'YDTU' against the official ON Semiconductor website to confirm tape-and-reel packing details, as datasheet documentation primarily references TU variants. Confirm that the component status aligns with current production availability, as legacy Fairchild part numbers may have transitioned nomenclature during integration. Ensure compliance with RoHS standards and verify pin-out assignments for the TO-220F 4L (Forming) package before finalizing procurement orders.

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

Select this regulator when a 2 A output current capacity is required alongside precise voltage regulation capabilities. The KA278RA05CYDTU is suitable for designs needing both fixed 5 V operation and adjustable voltage ranges from 1.27 V to 32 V. Consider the TO-220F 4L package for through-hole mounting applications where thermal dissipation up to 15 W with a heat sink is necessary. Evaluate the input voltage requirements to ensure they remain within the absolute maximum ratings specified in the datasheet.

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

This component belongs to the KA278RXXC-Series of 2 A Output Low Dropout Voltage Regulators. Originally developed by Fairchild Semiconductor, the product line was integrated into ON Semiconductor following corporate acquisition. The series includes fixed output variants such as 3.3 V, 5 V, and 12 V, alongside the adjustable KA278RA05C model. These regulators are designed for robust performance in various electronic equipment applications.

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

KA278R05CTU

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

What is the difference between the KA278RA05C and KA278R05C models?

The KA278RA05C offers an adjustable output voltage range between 1.27 V and 32 V in addition to a nominal 5 V fixed output, whereas the KA278R05C provides only a fixed 5 V output.

How does the output disable function work?

The device includes a Vdis pin that allows the output to be actively disabled. Applying a high voltage to this pin keeps the output active, while applying a low voltage disables the output, facilitating power management in system designs.