LM78L09ACZ

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

The LM78L09ACZ is a fixed positive linear voltage regulator manufactured by Texas Instruments, belonging to the LM78Lxx series. It provides a fixed output voltage of 9V with a maximum continuous output current of 100mA. The device supports an input voltage range up to 35V and operates within a junction temperature range of 0°C to 125°C. Key electrical specifications include a typical static current of 3mA and a power dissipation rating of 0.75W. It features internal protection mechanisms against overcurrent, thermal overload, and short circuits, housed in a TO-92 three-pin through-hole package.

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

• Provides a stable fixed 9V DC output suitable for low-power circuit applications
• Integrates comprehensive internal protection including thermal shutdown and current limiting
• Designed for robust operation across industrial temperature ranges up to 125°C

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

• General-purpose positive voltage regulation in electronic circuits
• Power supply stages for low-current digital logic components
• Battery-powered equipment requiring stable 9V rail generation

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

Verify the specific suffix ACZ corresponds to the Texas Instruments manufacturing origin and lead-free compliance status. Confirm the package type matches the required TO-92 through-hole footprint for your PCB layout. Ensure the component meets RoHS directives if applicable to your assembly process. Cross-reference the datasheet revision date to confirm parameter consistency with your design requirements.

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

Select this component when a fixed 9V output at 100mA is required in a compact through-hole form factor. Consider the 0.75W power dissipation limit relative to the expected input-output voltage differential and ambient temperature. Evaluate the need for external heat sinking if operating near maximum thermal limits. Compare against other LM78Lxx variants if different voltage levels are needed.

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

This part belongs to the LM78Lxx family of three-terminal positive voltage regulators from Texas Instruments. These devices are widely used as local zener diode replacements in power supplies due to their simplicity and reliability. The LM78L series offers lower current capability compared to the standard LM78xx series but fits in smaller packages like TO-92, making it ideal for space-constrained designs.

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

Direct pin-compatible substitutes include the STMicroelectronics L78L09ACZ and the onsemi MC78L09ACD (note package difference). Verify that alternative manufacturers meet the same electrical specifications for output voltage tolerance, dropout voltage, and thermal protection thresholds.