KA78RM33RTF

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

The KA78RM33RTF is a fixed positive low-dropout voltage regulator manufactured by onsemi. It provides a stable 3.3 V output with a maximum current capability of 0.5 A. The device operates within an input voltage range up to 20 V and maintains a maximum dropout voltage of 0.6 V at full load. Electrical specifications include a line regulation of 20 mV, load regulation of 20 mV, and ripple rejection of 55 dB at 120 Hz. The quiescent current is typically 10 mA. It features thermal shutdown, over-current protection, and SOA protection. The component is housed in a DPAK (TO-252) surface-mount package and supports an operating temperature range from -40°C to +125°C.

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

• Integrated thermal shutdown and over-current protection for enhanced circuit safety
• Low dropout voltage characteristic enabling efficient power conversion
• Surface-mount DPAK packaging suitable for automated assembly

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

• Portable battery-powered equipment requiring regulated 3.3 V supply
• General-purpose DC-to-DC converter circuits
• Post-regulation stages for switching power supplies

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

Verify the specific ordering suffix RTF to confirm tape and reel packaging configuration. Ensure compatibility with the DPAK footprint during PCB layout. Confirm that the selected component meets all required electrical parameters for the target application environment. Check for any recent product change notifications or obsolescence notices from the manufacturer before finalizing procurement plans.

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

Select this regulator when a fixed 3.3 V output is required with moderate current demands up to 0.5 A. Consider the thermal resistance characteristics and potential need for adequate copper area on the PCB for heat dissipation. Evaluate the input voltage headroom against the specified dropout voltage to ensure stable regulation under varying load conditions.

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

This component belongs to the KA78RM series of low-dropout regulators produced by onsemi. It is designed as a surface-mount alternative to traditional through-hole linear regulators. The series focuses on providing reliable voltage regulation in compact form factors for modern electronic designs requiring efficient power management solutions.

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

Direct pin-compatible replacements may include other 3.3 V LDOs in DPAK packages from various manufacturers. Verify equivalent electrical specifications such as dropout voltage, current rating, and protection features before substitution.