KA7809ERTF

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

The KA7809ERTF is a three-terminal positive linear voltage regulator from the KA78XXE series, manufactured by onsemi. It provides a fixed output voltage of 9 V with a maximum continuous output current of 1 A. The device utilizes D-PAK surface-mount packaging and supports an operating temperature range from -40°C to +125°C. Electrical characteristics include a typical ripple rejection of 71 dB at 120 Hz and a dropout voltage of 2 V at full load.

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

• Integrated thermal overload protection prevents damage during excessive heat generation.
• Built-in short-circuit protection limits current flow during output faults.
• Safe Operating Area (SOA) protection ensures stability under varying load conditions.

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

• General-purpose DC power supply regulation
• Local on-card regulation for distribution networks
• Embedded systems requiring stable 9 V logic or analog supplies

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

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Confirm that the component meets RoHS compliance requirements for your target market. Ensure adequate thermal management design is implemented, as the device dissipates significant heat when input-output differential voltage is high.

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

Select this component when a fixed 9 V output is required in a surface-mount application. Verify that the input voltage remains within the specified 11.5 V to 24 V range to maintain proper regulation. Consider the thermal resistance characteristics of the D-PAK package and ensure sufficient PCB copper area is allocated for heat dissipation to support the 1 A current rating.

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

This part belongs to the KA78XXE family of three-terminal positive regulators originally developed by Fairchild Semiconductor. Following the corporate integration into onsemi, product nomenclature and ordering information were updated to align with new system requirements. The KA7809ERTF represents the 9 V variant within this legacy series, maintaining compatibility with standard 3-terminal regulator pinouts.

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

KA7809ERTM

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

What is the minimum input voltage required for the KA7809ERTF?

The minimum input voltage is 11.5 V to ensure proper regulation at the 9 V output.

Does the KA7809ERTF include internal protection features?

Yes, it includes thermal overload protection, short-circuit protection, and Safe Operating Area (SOA) protection.