LD29300V18

Overview

The LD29300V18 is a fixed-output linear voltage regulator from the STMicroelectronics LD29300 series, providing a nominal output of 1.8 V with ±1% tolerance at 25°C. It supports a guaranteed continuous output current up to 3 A and features a typical dropout voltage of 0.4 V at full load. The device includes logic-controlled electronic shutdown functionality and internal protection against overcurrent and thermal overload. It operates within a junction temperature range of -40°C to 125°C.

Feature Summary

• Guarantees high output current capability up to 3 A for demanding loads
• Features very low dropout voltage characteristics for efficient power management
• Includes logic-controlled electronic shutdown for system power optimization
• Provides internal current limiting and thermal shutdown protection

Applications

• Power supply switching post regulation
• Series power supply for monitors
• Series power supply for VCRs and TVs
• Computer systems
• Battery-powered systems

Procurement Notes

Verify the specific package variant (TO-220, D2PAK, or P2PAK) required for your design, as the base part number corresponds to multiple physical packages. Confirm that the lead time and availability align with project schedules, noting that this component may be subject to end-of-life status or discontinuation by the manufacturer. Ensure compliance with RoHS directives if applicable to your region.

Selection Notes

Select the LD29300V18 when a stable 1.8 V rail is needed with high current capacity. Consider the TO-220 package for through-hole mounting or D2PAK/P2PAK for surface mount applications. Evaluate thermal resistance requirements based on the expected input-to-output voltage differential and ambient conditions to ensure operation within the specified junction temperature limits.

Part Context

This component belongs to the LD29300 series of very low dropout voltage regulators designed for high-current applications. The series offers various fixed output voltages and adjustable versions across different package types including TO-220, D2PAK, and P2PAK variants. These regulators are engineered for stability with standard ceramic capacitors and feature precise output voltage accuracy suitable for sensitive digital logic circuits.

Replacement Considerations

Direct substitutes include other LD29300 series variants with different output voltages such as LD29300V25 or LD29300V33, provided the voltage requirement changes. For pin-compatible replacements in the same package, verify electrical parameters match, specifically the 3 A current rating and 1.8 V output.