L4993DTR

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

The L4993DTR is an automotive-grade low-dropout voltage regulator from STMicroelectronics, designed for microprocessor systems. It provides a fixed 5 V output with a maximum current of 150 mA and operates within a DC supply voltage range of 5.6 V to 31 V. The device features a p-channel MOS regulating element, ensuring regulation against input transients up to 40 V. Key electrical parameters include a typical dropout voltage of 200 mV at full load, a quiescent current of 180 uA, and a voltage regulation accuracy of 2%. It includes integrated thermal shutdown and short-circuit protection.

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

• Integrates a watchdog timer and reset circuit for enhanced system reliability in automotive environments
• Features an enable input to control the activation of the voltage regulator and watchdog functionality
• Utilizes a pre-trimmed reference voltage to achieve high precision output voltage regulation

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

• Supplying power to microprocessor systems in automotive applications
• Automotive electronic control units requiring AEC-Q100 qualified components
• Systems needing reliable voltage regulation under wide input voltage transients

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

Verify the specific suffix 'DTR' indicates the tape-and-reel packaging configuration when ordering. Confirm that the fixed 5 V output variant aligns with the design requirements, as other variants in the L4993 family may offer adjustable outputs or different pinouts. Ensure compatibility with the required SOIC-8 package dimensions and check for any specific moisture sensitivity level handling instructions prior to assembly.

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

Select this component for applications requiring a robust, automotive-qualified LDO with built-in safety features like watchdog and reset. The fixed 5 V output simplifies design compared to adjustable versions. Consider the 150 mA current limit and 200 mV dropout voltage when sizing the input voltage headroom. Verify that the SOIC-8 package fits the PCB layout constraints and that the thermal performance meets the dissipation requirements for the expected ambient temperature range.

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

The L4993 belongs to a family of monolithic integrated voltage regulators specifically engineered for automotive use. It combines standard LDO capabilities with advanced digital monitoring features such as watchdog timers and programmable reset delays. This integration reduces the component count and board space required for creating resilient power management solutions in vehicle electronics.

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

Check for direct replacements within the L4993 family, such as the L4995 series, which offers higher current capacity but may differ in pinout or feature set. Verify that any substitute maintains AEC-Q100 qualification and compatible operating voltage ranges.