KA7809ERTM

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

The KA7809ERTM is a three-terminal positive voltage regulator from the KA78XXE series, manufactured by onsemi. It provides a fixed output voltage of 9 V with a maximum output current of 1 A. The device utilizes D-PAK surface-mount packaging and supports an operating temperature range of -40°C to +125°C. Electrical characteristics include a typical ripple rejection of 71 dB at 120 Hz, a dropout voltage of 2 V at 1 A, and a quiescent current of 8 mA. Input voltage limits are specified up to 35 V for this output level.

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

• Integrated thermal overload protection prevents damage during excessive heat conditions.
• Internal short-circuit protection safeguards the device against output faults.
• Output transistor safe operating area protection ensures reliability under varying load conditions.

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

• General-purpose DC-to-DC conversion
• Local on-card regulation for power distribution networks
• Applications requiring fixed positive voltage sources

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

Verify the specific ordering suffix 'ERTM' corresponds to the D-PAK tape and reel package configuration as defined in the manufacturer's ordering information. Confirm that the component meets the required environmental specifications for the intended operating temperature range before integration into final designs.

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

Select this component when a surface-mount solution is required for a fixed 9 V supply. Ensure the application design accounts for the thermal resistance characteristics of the D-PAK package to maintain junction temperatures within the specified operational limits during continuous operation.

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

This part belongs to the KA78XXE series of three-terminal positive regulators originally developed by Fairchild Semiconductor and now managed by onsemi following corporate integration. The series offers multiple fixed output voltages and is designed for robust performance in standard linear regulation applications.

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

Publicly confirmed substitute part numbers are not provided in the source documentation. Verify compatibility with alternative manufacturers such as STMicroelectronics or Texas Instruments based on pinout and electrical parameter matching.