KA7809ETSTU

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

The KA7809ETSTU is a three-terminal positive linear voltage regulator from the KA78XXE series by onsemi. It provides a fixed output voltage of 9 V with a maximum output current of 1 A. The device operates within an input voltage range of 11.5 V to 24 V and supports a junction temperature range of -40°C to +125°C. Key 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 approximately 8 mA. The unit is housed in a D-PAK surface-mount package.

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

• Integrated thermal overload protection prevents damage during excessive heat conditions.
• Built-in short-circuit protection limits output current to safe levels during fault events.
• Output transistor safe operating area protection ensures stability under varying load conditions.

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

• General-purpose DC-to-DC regulation for electronic circuits
• Local on-card regulation requiring stable fixed voltage outputs
• Power supplies utilizing external components for adjustable voltage or current

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

Verify the specific ordering suffix ETSTU against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with existing PCB footprints for the D-PAK configuration. Confirm that the component meets all required environmental standards for the intended application environment before finalizing procurement.

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

Select this regulator when a fixed 9 V output is required with up to 1 A of continuous current capability. Consider the D-PAK package for surface-mount assembly needs. Evaluate thermal management requirements based on the input-output differential and ambient temperature conditions to ensure operation within the specified junction temperature range.

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

This component belongs to the KA78XXE series of three-terminal positive regulators. The series offers multiple fixed output voltages including 5, 6, 8, 9, 10, 12, 15, 18, and 24 V. These devices are designed for wide-ranging applications due to their robust internal protection features and ability to deliver high output currents with adequate heat sinking.

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

MC7809CTG

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

What is the maximum input voltage for the KA7809ETSTU?

The maximum input voltage is 24 V for the KA7809 variant.

Does the KA7809ETSTU include protection against short circuits?

Yes, the device includes internal short-circuit protection to limit output current during fault conditions.