KA78R33CTU

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

The KA78R33CTU is a fixed positive low-dropout voltage regulator manufactured by onsemi. It provides a stable 3.3 V output with a maximum current capacity of 1 A. The device operates within an input voltage range of 4 V to 35 V and features a maximum dropout voltage of 500 mV. It utilizes a TO-220-4 through-hole package and supports power dissipation up to 15 W. The operational temperature range extends from -20 °C to +80 °C, with line regulation at 2.5 % and load regulation at 2 %.

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

• Provides fixed positive voltage regulation suitable for standard electronic equipment power supplies.
• Integrates internal protection mechanisms including thermal shutdown and safe operating area limits.
• Designed for through-hole mounting to facilitate integration into legacy or high-power circuit boards.

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

• General-purpose linear power supply circuits requiring stable 3.3 V rails.
• Battery-powered systems utilizing the low dropout characteristic for extended runtime.
• Embedded control units and microprocessor power distribution networks.

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

Verify component authenticity and datasheet alignment prior to procurement. Confirm that the specific lot matches the required thermal and electrical specifications for your application. Check for end-of-life status or obsolescence notices from the manufacturer. Ensure compatibility with existing PCB footprints and thermal management strategies. Validate regulatory compliance requirements such as RoHS standards for your target market.

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

Select this component when a fixed 3.3 V output is required with up to 1 A load capability. Consider the TO-220-4 package for applications needing robust heat dissipation via through-hole mounting. Evaluate the 500 mV dropout voltage against your minimum input voltage constraints. Compare line and load regulation performance against system stability requirements. Assess thermal resistance and ambient operating conditions to ensure safe power dissipation levels.

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

This part belongs to the KA78R series of low-dropout regulators from onsemi. The series offers various fixed output voltages tailored for different power management needs. The KA78R33CTU specifically addresses the common 3.3 V logic level requirement in mixed-voltage digital systems. It serves as a reliable solution for converting higher unregulated DC sources to stable low-voltage outputs.

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

Consult official onsemi documentation for direct pin-compatible substitutes within the KA78R family. Verify equivalent electrical parameters such as output voltage, current rating, and dropout characteristics. Ensure alternative packages match the physical mounting and thermal requirements of the design.