LD29150DT18

Overview

The LD29150DT18 is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a positive output voltage of 1.8V with a maximum continuous output current capability of 1.5A. The device is housed in a surface-mount DPAK package, specifically the TO-252-3 form factor with two leads and a tab. It operates within an input voltage range up to a maximum of 14V. Key electrical parameters include a maximum dropout voltage of 0.7V at full load, line regulation of 0.5%, and load regulation of 1%. The quiescent current is specified at a maximum of 80mA, while the ground current is typically lower. The unit supports an operating junction temperature range from -40°C to +125°C.

Feature Summary

• Guarantees high output current performance up to 1.5A for demanding load applications.
• Features very low dropout voltage characteristics suitable for battery-powered systems.
• Includes internal protection mechanisms against overcurrent conditions and excessive thermal stress.

Applications

• Post-regulation stages in switching power supply architectures
• Series power supplies for computer systems and monitors
• Battery-powered electronic devices requiring stable voltage rails

Procurement Notes

Verify the specific suffix 'DT' confirms the DPAK/TO-252-3 surface mount package configuration. Confirm the '18' designation corresponds to the fixed 1.8V output voltage. Ensure the component status is active if long-term availability is required, as some variants in this series may be discontinued. Cross-reference the manufacturer's official documentation for any recent packaging or material compliance updates.

Selection Notes

Select this component when a fixed 1.8V rail is needed with up to 1.5A capacity in a compact surface-mount footprint. Consider the 14V maximum input rating and thermal dissipation requirements inherent to the DPAK package. Evaluate the 0.7V dropout specification against the minimum input voltage margin required for the specific application load conditions.

Part Context

This part belongs to the LD29150 series of high-current, high-accuracy LDO regulators. The series is characterized by very low dropout voltages and low ground currents, making it suitable for both high-current loads and critical low-dropout scenarios. Other variants in the family offer different fixed output voltages and adjustable options, often sharing similar protection features and thermal characteristics.

Replacement Considerations

Check for other LD29150 variants with different output voltages if the 1.8V requirement changes. Verify pin-out compatibility with alternative LDOs offering similar 1.5A current ratings and DPAK packages. Ensure substitute components meet the same thermal and electrical specifications for the target application environment.