L4979MD013TR

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

The L4979MD013TR is a low dropout linear regulator from STMicroelectronics, designed for automotive applications with AEC-Q100 qualification. It provides a fixed 5 V output with a maximum current of 280 mA in the MD variant. The device operates within an input voltage range of 6 V to 31 V and features a typical dropout voltage of 200 mV. Quiescent current is specified at 3 mA, dropping to lower levels when disabled. It includes microprocessor control functions such as low voltage reset and watchdog timer capabilities. The unit is housed in a SOIC-20 package and supports an operating temperature range from -40 °C to +150 °C.

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

• Integrated microprocessor control functions including low voltage reset and programmable watchdog timer
• High precision output voltage regulation with +/-2% accuracy maintained over wide temperature ranges
• Automotive grade qualification compliant with AEC-Q100 standards for reliability
• Built-in thermal shutdown and short circuit protection for enhanced system safety

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

• Automotive electronic systems requiring robust power management
• Microprocessor supply circuits with reset and watchdog requirements
• Industrial control units operating in high-temperature environments

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

Verify the specific suffix '013TR' corresponds to the tape and reel packaging configuration intended for automated assembly processes. Confirm that the 280 mA output current rating aligns with the load requirements, as the standard L4979MD may offer higher current capacity. Ensure the SOIC-20 package dimensions match the PCB footprint design. Check for any recent product change notifications regarding pinout or electrical characteristics updates.

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

Select this component when automotive-grade reliability and integrated supervisor functions are required alongside voltage regulation. The fixed 5 V output simplifies design compared to adjustable regulators. Consider the 280 mA limit against peak load demands; if higher current is needed, evaluate the non-trailing zero variant. The wide input voltage range accommodates various automotive battery conditions. Verify thermal performance under maximum load and ambient temperature constraints.

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

This part belongs to the L4979D family of low dropout regulators featuring microprocessor control. The 'MD' designation typically indicates specific current or package variations within the series. The '013TR' suffix denotes the reel packaging format used for surface mount technology assembly. These devices are engineered for harsh environments, combining linear regulation with supervisory logic in a single IC.

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

The L4979MD (tube packaging) offers identical electrical specifications but differs in packaging format. Verify compatibility with existing pick-and-place equipment if switching between reel and tube formats. No direct functional substitutes are documented in the provided data.