UA78L05ACDG4

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

The UA78L05ACDG4 is a fixed positive linear voltage regulator from the Texas Instruments UA78L series, housed in an 8-pin SOIC package. It provides a stable 5V output with a maximum current of 100mA. The device operates within an input voltage range of 7V to 20V and supports a junction temperature range of -40°C to +125°C for newer variants. Key electrical characteristics include a typical PSRR of 49dB at 120Hz, line regulation of 150mV, and load regulation of 60mV. Static current is specified at 6mA. The component integrates internal protection mechanisms against overload conditions.

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

• Integrated thermal shutdown and short-circuit current limiting protect the device during overload events.
• Requires no external capacitors for stability across the full load current range.
• Provides robust power supply rejection ratio to minimize noise impact on regulated outputs.

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

• Board-level voltage regulation for electronic circuits
• Local power management in battery-operated systems
• Interface circuitry requiring stable 5V logic supplies

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

Verify the specific suffix and revision level when sourcing replacements, as manufacturing changes may affect pinout or thermal characteristics. Confirm RoHS compliance status and moisture sensitivity classification prior to integration into surface mount assembly lines. Cross-reference datasheet revisions to ensure compatibility with existing design constraints.

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

Select this component for applications requiring a compact surface-mount solution with fixed 5V regulation. Ensure the input voltage remains within the specified 7V to 20V window to maintain proper dropout performance. Consider the thermal dissipation capabilities of the SOIC-8 package relative to the expected load current and ambient operating temperature.

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

This part belongs to the UA78L family of low-current linear regulators designed by Texas Instruments. The series offers various output voltages and packaging options, including TO-92 and SOT-89, to suit different space and power requirements. The UA78L05 variant specifically targets standard 5V logic applications requiring moderate current drive.

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

Compatible substitutes include MC78L05ABDR2G and NCV78L05ABDR2G from onsemi. Verify pin compatibility and thermal performance before substitution.