L4993MDTR

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

The L4993MDTR is an automotive-grade low-dropout voltage regulator manufactured by STMicroelectronics, designed for microprocessor system supply. It features a p-channel MOS output regulating element capable of handling input voltage transients up to 40 V while delivering a maximum output current of 150 mA. The device provides an adjustable output voltage range from -300 mV to 6 V with a typical dropout voltage of 200 mV and a maximum of 400 mV at full load. It operates within a DC supply voltage range of 5.6 V to 31 V and maintains a quiescent current of 180 uA. The component is qualified under AEC-Q100 standards and functions reliably across a junction temperature range of -40°C to +150°C.

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

• Integrated watchdog timer and programmable reset circuit with external capacitor control for enhanced system reliability
• P-channel MOS output stage ensures stable regulation despite significant input voltage transients
• Includes thermal shutdown and short-circuit protection mechanisms to safeguard against extreme power dissipation

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

• Supplying microprocessor systems in automotive applications
• Automotive electronic control units requiring AEC-Q100 qualification
• Power management circuits for embedded systems operating under wide temperature variations

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

Verify the specific suffix 'MDTR' corresponds to the tape-and-reel packaging variant rather than the tube-packaged 'MD'. Confirm that the orderable part number matches the exact pin configuration and electrical specifications required for your design. Ensure compatibility with the SOIC-20 package dimensions and soldering profiles during assembly planning.

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

Select this component when designing automotive power supplies that require integrated safety features such as watchdogs and resets alongside voltage regulation. It is suitable for applications needing high transient immunity and operation across extended industrial temperature ranges. Consider the adjustable output capability if precise voltage levels outside standard fixed options are required.

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

The L4993 belongs to a family of automotive low-dropout regulators featuring active watchdogs. It shares core architectural similarities with other members like the L4995 but offers specific current ratings and package options tailored for different integration needs. This series is engineered to meet the rigorous demands of modern vehicle electronics.

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

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-compatibility with similar automotive LDOs only through official manufacturer substitution guides or direct engineering consultation.