L4949EP-E

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

The L4949EP-E is a monolithic integrated 5V voltage regulator featuring very low dropout output and additional functions such as power-on reset and input voltage sense. Designed for microcomputer-controlled systems, particularly in automotive applications, it operates within a DC supply voltage range of 5 V to 28 V with transient support up to 40 V. It provides an output current capability of up to 100 mA with a fixed 5 V ±1% precision standby output. The device includes thermal shutdown and short circuit protections, ensuring reliability under varying load conditions.

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

• AEC-Q100 qualified for automotive grade reliability
• Integrated power-on reset circuit with programmable pulse delay via external capacitor
• Built-in voltage sense comparator for input monitoring
• ECOPACK compliant lead-free and RoHS construction

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

• Microcomputer controlled systems in automotive environments
• Power supply units requiring low dropout regulation
• Systems needing integrated voltage supervision and reset functions

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

Verify the specific suffix and package configuration against the official STMicroelectronics datasheet before ordering. Confirm AEC-Q100 qualification status if automotive compliance is mandatory. Ensure the SO-20W package matches the target PCB footprint. Check for any recent product change notices regarding material or packaging updates.

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

Select this component when a fixed 5V output with high precision is required alongside system supervision features. The low quiescent current makes it suitable for standby modes. Consider the 20-SO package size for space-constrained designs. Verify that the input voltage range aligns with the system's power source capabilities.

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

This part belongs to the L4949 series of multifunction low-dropout regulators from STMicroelectronics. It shares functional similarities with variants like the L4949ED-E but differs in packaging and potentially minor electrical characteristics. The series is targeted at robust power management solutions for embedded control systems.

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

Check for direct pin-compatible alternatives within the same family, such as the L4949ED-E, ensuring package compatibility. Verify that substitute parts maintain the same AEC-Q100 qualification and output current ratings.