LD29080DT33R

Overview

The LD29080DT33R is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.3V output with a maximum guaranteed current of 800 mA. The device operates within an input voltage range of 2.5V to 13V and features a typical dropout voltage of 400 mV at full load. It incorporates internal current limiting and thermal shutdown protection for enhanced reliability. The component utilizes a surface-mount SOT-89-3 package, measuring 6.6mm in length, 6.2mm in width, and 2.4mm in height. It supports operation up to a maximum junction temperature of 125°C.

Feature Summary

• Guarantees 800 mA output current capability for medium-current applications
• Features very low dropout voltage (typical 400 mV) and low ground current
• Includes logic-controlled electronic shutdown function
• Provides high accuracy with ±1% output voltage tolerance at 25°C

Applications

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

Procurement Notes

Verify the specific suffix DT33R confirms the fixed 3.3V output and SOT-89-3 package configuration. Ensure compatibility with the required 800 mA load current and 13V maximum input voltage. Confirm that the operating environment remains within the specified -40°C to 125°C temperature range. Check for any specific handling requirements associated with the surface-mount package type during assembly.

Selection Notes

Select this component when a medium-current LDO with low dropout characteristics is required. It is suitable for applications where space is limited due to its compact SOT-89-3 package. Consider this part for battery-operated devices requiring efficient power management and low quiescent current. Verify that the input voltage does not exceed the 13V absolute maximum rating under all operating conditions.

Part Context

This device belongs to the LD29080 series of ultra-low-dropout regulators from STMicroelectronics. The series offers both fixed and adjustable output voltage options. It is designed for applications demanding high accuracy and low noise. The family includes variants with different output voltages and package types to suit various design constraints.

Replacement Considerations

Direct substitutes include other LD29080 variants with compatible pinouts and electrical specifications. Verify that alternative parts maintain the same 800 mA current rating and 3.3V output if exact replacement is needed. Cross-reference package dimensions to ensure mechanical fit.