KA78RH33RTF

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

The KA78RH33RTF is a fixed positive low-dropout voltage regulator manufactured by onsemi, designed for surface-mount applications in the TO-252-3 package. It provides a stable 3.3 V output with a maximum continuous current of 0.8 A. The device supports input voltages up to 15 V and maintains regulation across an operating temperature range from -25 °C to +125 °C. Key electrical specifications include a dropout voltage of 1 V at full load, line regulation of 10 mV, and load regulation of 20 mV. Quiescent current is specified at 10 mA, with an input bias current of 5 mA. Voltage accuracy is maintained within 1% tolerance.

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

• Fixed 3.3 V output regulation suitable for digital logic power supplies
• Low dropout performance enabling efficient operation with minimal input-output differential
• Integrated thermal protection mechanisms for safe operation under overload conditions

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

• Portable battery-powered equipment requiring stable low-voltage rails
• Embedded systems utilizing microcontrollers and memory components
• General-purpose power management circuits in consumer electronics

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

Verify component authenticity through authorized distribution channels due to discontinuation status. Confirm RoHS compliance documentation matches specific manufacturing lot requirements. Validate package marking codes against official datasheet references to ensure correct part identification during assembly integration.

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

Select this regulator when surface-mount space constraints require a TO-252-3 footprint alongside moderate current demands. Consider thermal dissipation capabilities relative to PCB copper area limitations. Evaluate input voltage stability to ensure it remains within the 15 V maximum rating while maintaining sufficient headroom above the 3.3 V output level for optimal dropout performance.

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

This component belongs to the KA78RH series of low-dropout regulators from onsemi, focusing on single-output fixed voltage configurations. It complements other variants in the family offering different current ratings or package types. The series targets applications needing reliable linear regulation with reduced power loss compared to standard linear regulators.

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

KA78R33CTU offers similar 3.3 V regulation but utilizes a through-hole TO-220-4 package with higher current capacity.