L4949ED

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

The L4949ED is a monolithic integrated 5V voltage regulator with very low dropout output and additional functions as power-on reset and input voltage sense. It is designed for supplying microcomputer controlled systems especially in automotive applications. Operating DC supply voltage range is 5 V to 28 V, with transient supply voltage up to 40 V. Output current capability is up to 100 mA. Very low dropout voltage is less than 0.5 V. High precision standby output voltage is 5V±1%. Extremely low quiescent current in standby mode.

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

• Monolithic integrated 5V voltage regulator with very low dropout output
• Additional functions include power-on reset and input voltage sense
• Designed for supplying microcomputer controlled systems especially in automotive applications

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

• Microcomputer controlled systems
• Automotive applications

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

Verify the exact ordering code suffix against the manufacturer's official documentation to ensure correct package type and tape/reel configuration. Confirm component status as obsolete or not recommended for new designs before finalizing procurement plans. Check for any product change notifications that may affect specifications or availability.

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

Select this component when a fixed 5V output with integrated reset and sense features is required. Ensure the application operates within the specified DC supply voltage range of 5 V to 28 V and can handle transient voltages up to 40 V. Consider the SO-8 package dimensions and thermal resistance for proper heat dissipation in the design.

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

The L4949E series includes variants like L4949ED and L4949EP, available in SO-8 and SO-20 packages respectively. These devices are part of STMicroelectronics' portfolio of multifunction very low drop voltage regulators. The series is designed to meet the specific requirements of automotive microprocessor systems, offering robust performance under varying supply conditions.

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

Check for direct pin-to-pin replacements within the same family, such as L4949EP for different package options. Verify if newer generations of LDO regulators with similar features are available from the manufacturer. Ensure any substitute maintains the required reset threshold and sense comparator functionality.