L4988MDTR

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

The L4988MDTR is a monolithic automotive-grade linear voltage regulator featuring a fixed 5V output and a maximum continuous current of 200mA. It utilizes a p-channel MOSFET pass element to achieve low dropout characteristics, maintaining regulation despite input transients up to 31V. The device integrates a pre-trimmed reference for high precision and includes comprehensive protection against short circuits and thermal overload. It operates within a junction temperature range of -40°C to 150°C and is qualified under AEC-Q100 standards.

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

• Integrated reset circuit with programmable pulse delay via external capacitor
• Built-in watchdog timer with programmable duration using an external capacitor
• Enable input pin allows control over watchdog functionality activation
• Robust protection mechanisms including thermal shutdown and short-circuit limiting

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

• Microprocessor system power supply in automotive environments
• Automotive electronic control units requiring stable 5V logic levels
• Systems necessitating hardware-based reset and watchdog supervision

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

Verify the specific suffix MDTR confirms the tape-and-reel packaging format and SO-20 package variant. Confirm AEC-Q100 qualification status matches project requirements. Ensure the fixed 5V output aligns with target load specifications. Check for any obsolete status notifications from STMicroelectronics before finalizing procurement plans.

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

Select this component when a fixed 5V rail is required for automotive microprocessors. The integrated reset and watchdog features reduce external component count compared to standard LDOs. Consider the 200mA current limit for load capacity. The wide operating voltage range supports direct connection to vehicle battery systems without additional pre-regulation stages.

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

This part belongs to the L4988 family of automotive low-dropout regulators designed by STMicroelectronics. These devices are engineered specifically for harsh automotive electrical environments. The family emphasizes reliability through AEC-Q100 certification and integrated supervisory functions essential for modern vehicle electronics.

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

Check for direct cross-reference availability within the L49xx series. Verify pin compatibility if substituting with similar automotive regulators. Ensure replacement parts maintain equivalent reset and watchdog timing capabilities.