AN78L24

Overview

The AN78L24 is a 3-pin fixed positive output monolithic voltage regulator from the AN78Lxx series, manufactured by Panasonic. It provides a nominal 24V output with a maximum continuous current capacity of 100mA. The device accepts an input voltage range up to 39V and operates within a junction temperature range of -55°C to +150°C. Key electrical characteristics include a typical line regulation of 60mV and load regulation of 40mV at 25°C. It features built-in overcurrent limiting and thermal overload protection circuits.

Feature Summary

• Provides stabilized fixed positive output voltage without requiring external components
• Integrates internal overcurrent limit circuitry for short-circuit protection
• Includes thermal overload protection circuit to prevent damage during overheating

Applications

• Power supply circuits requiring stable 24V DC output
• General electronic equipment power regulation
• Office equipment and measuring instruments
• Household appliance control circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package type (SSIP or HSIP) matches design requirements. Check for lead-free variants if environmental compliance is mandatory. Ensure storage conditions adhere to moisture sensitivity levels specified in the datasheet to maintain reliability before soldering.

Selection Notes

Select this component when a fixed 24V linear regulation is required for low-current applications up to 100mA. Consider the minimum input/output voltage difference of approximately 25.2V when designing the input stage. Evaluate thermal dissipation capabilities based on ambient temperature and PCB copper area, as heat sinking may be necessary for high differential voltages.

Part Context

The AN78L24 belongs to the AN78Lxx/AN78LxxM series of 3-pin positive voltage regulators. This family offers various fixed output voltages ranging from 4V to 24V. The 'M' suffix typically denotes a specific package variant or revision within the same functional series, sharing identical electrical performance characteristics while potentially differing in physical housing dimensions.

Replacement Considerations

Compatible substitutes include other 3-pin 24V linear regulators with similar 100mA output current ratings. Verify pinout compatibility (Input, Ground, Output) and package footprint before substitution. Ensure replacement parts meet the same absolute maximum rating limits for input voltage and power dissipation.