KA7815ETU

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

The KA7815ETU is a three-terminal positive linear voltage regulator from the KA78XXE series, manufactured by onsemi. It provides a fixed output voltage of 15 V with a maximum output current of 1 A and an output voltage tolerance of ±4%. The device operates within a junction temperature range of -40°C to +125°C and is housed in a TO-220 (Dual Gauge) package. Key electrical characteristics include a typical quiescent current of 8 mA, a dropout voltage of 2 V at 1 A, and short-circuit protection limiting current to approximately 250 mA.

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 power supply regulation
• Local voltage regulation for bias circuits
• Embedded system power management

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

Verify the specific suffix ETU corresponds to the TO-220 Dual Gauge package and rail parking method as defined in the ordering information table. Confirm that the E-series designation indicates the extended temperature range (-40°C to +125°C) rather than the AE-series commercial grade. Ensure compatibility with the required mounting style and lead configuration for the target PCB design.

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

Select this component when a fixed 15 V output is required with up to 1 A load capability. The KA7815ETU is suitable for applications requiring robust internal protection features against thermal stress and short circuits. Consider the thermal resistance values and necessary heat sinking if the input-output differential voltage results in significant power dissipation exceeding the device's thermal limits.

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 and now managed by onsemi following corporate integration. The series offers multiple fixed output voltages including 5, 6, 8, 9, 10, 12, 15, 18, and 24 V options. These regulators are designed for wide-ranging industrial and commercial applications requiring reliable linear regulation.

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

KA7815AE

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

What is the difference between the KA7815ETU and KA7815AETU?

The KA7815ETU belongs to the E-series with an operating temperature range of -40°C to +125°C and a ±4% output voltage tolerance. The KA7815AETU belongs to the AE-series with a commercial temperature range of 0°C to +125°C and a tighter ±2% output voltage tolerance.

Does the KA7815ETU require external capacitors for stability?

Yes, the datasheet specifies recommended external capacitor values for optimal performance: a 0.33 μF input capacitor and a 0.1 μF output capacitor are typically used in standard application circuits.