L4979DTR-E

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

The L4979DTR-E is a fixed-output low dropout linear regulator manufactured by STMicroelectronics, designed for automotive and industrial applications. It provides a stable 5 V output with a maximum current of 150 mA to 280 mA depending on specific operational conditions. The device operates within an input voltage range of 5.6 V to 31 V and features a typical quiescent current of 6 μA when disabled. It includes integrated microprocessor control functions such as low voltage reset, watchdog timer, and enable control. The component is qualified under AEC-Q100 standards and supports junction temperatures from -40 °C to +150 °C.

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

• Integrated microprocessor supervision including programmable watchdog timer and low voltage reset circuitry
• Ultra-low power consumption with typical 6 μA quiescent current in disabled state
• Automotive-grade reliability certified to AEC-Q100 standards for harsh environments
• Built-in thermal shutdown and short-circuit protection for enhanced system safety

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

• Automotive electronic control units requiring robust power management
• Industrial systems utilizing microprocessor-based architectures
• Battery-powered devices necessitating extended standby life through low quiescent current

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

Verify the exact output current rating (150 mA vs 280 mA) against the specific datasheet revision, as sources vary. Confirm package type is 8-SOIC. Ensure compatibility with AEC-Q100 requirements if used in automotive contexts. Check for moisture sensitivity level 3 handling requirements during assembly.

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

Select this component when a fixed 5 V supply with integrated reset and watchdog functions is required. It is suitable for designs needing high precision (+/-2%) and low dropout performance. Consider the 8-SOIC package constraints and thermal dissipation capabilities relative to the load current and ambient temperature conditions.

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

This part belongs to the L4979 series of low dropout regulators featuring microprocessor control. It complements other PMIC solutions by combining linear regulation with digital supervision logic. The series is designed to simplify board layouts by integrating multiple protection and control features into a single compact package.

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

L4979MD013TR is a related variant offering higher output current capability in a SOIC-20 package. Verify pinout compatibility and thermal characteristics before substitution.