LD29080DT90R

Overview

The LD29080DT90R is a positive fixed-output low-dropout linear regulator from STMicroelectronics, delivering up to 800 mA. It features a typical dropout voltage of 400 mV at full load and maintains output accuracy within ±1% at 25 °C. The device operates with an input voltage range from 2.5 V to 13 V and includes internal current limiting and thermal shutdown protection. Designed for surface-mount applications in DPAK packages, it supports logic-controlled electronic shutdown and exhibits very low ground current.

Feature Summary

• Guaranteed output current capability up to 800 mA for medium-current loads
• Very low dropout voltage characteristic ensuring efficiency under minimal headroom conditions
• Integrated protection mechanisms including internal current limit and thermal shutdown
• Logic-controlled electronic shutdown function for power management optimization

Applications

• Power supply switching post-regulation stages
• Series power supplies for monitors and televisions
• Battery-powered portable systems requiring extended runtime
• Computer system peripheral voltage regulation

Procurement Notes

Verify the specific suffix 'DT' confirms the DPAK-3 package configuration and RoHS compliance status against the manufacturer's latest documentation. Ensure the ordering code matches the required tape-and-reel quantity specifications if automated assembly is intended. Cross-reference the exact part number with official distributors to confirm availability and lead times prior to finalizing procurement plans.

Selection Notes

Select this component when a stable 9 V output is required with high current capacity and minimal voltage loss across the regulator. Consider its low quiescent current for battery-operated designs where standby power consumption is critical. Evaluate the thermal performance in the DPAK package relative to the expected ambient temperature and PCB copper area for adequate heat dissipation during continuous operation.

Part Context

This device belongs to the LD29080 series of medium-current, high-accuracy low-dropout regulators. The series offers both fixed and adjustable output options, designed for applications demanding precise voltage regulation with minimal power loss. The DT suffix specifically denotes the surface-mount DPAK packaging variant, distinguishing it from through-hole or other package types within the same functional family.

Replacement Considerations

Compatible substitutes include the LD29080DT33R for a 3.3 V output requirement and the LD29080PT90R for a PPAK package alternative. Verify pin compatibility and thermal characteristics when transitioning between these variants to ensure seamless integration into existing circuit layouts without redesigning the board footprint.