LDK130PU29R

Overview

The STMicroelectronics LDK130PU29R is a fixed-output low-dropout linear voltage regulator providing a precise 2.9V output with a maximum load current of 300mA. It operates from an input voltage range of 1.9V to 5.5V, featuring a typical dropout voltage of 100mV at 100mA. The device exhibits a low quiescent current of 60µA and includes logic-controlled shutdown functionality reducing consumption below 1µA. Packaged in a compact 6-DFN (1.2x1.3mm) surface-mount format, it ensures stability with ceramic capacitors and integrates short-circuit and thermal protection for reliable operation.

Feature Summary

• Ultra-low dropout voltage characteristic enabling efficient power management in battery-powered systems
• Logic-controlled electronic shutdown function for deep sleep modes with minimal current drain
• Integrated short-circuit constant current limiting and thermal overload protection mechanisms

Applications

• Low-power battery-operated consumer electronics requiring stable post-regulation
• Automotive embedded systems needing clean power supplies for sensitive components
• Portable devices utilizing ceramic capacitor-stabilized linear regulation

Procurement Notes

Verify the specific suffix 'PU' confirms the 2.9V fixed output variant and DFN6 package configuration. Ensure compatibility with standard reflow soldering profiles for 6-DFN components. Confirm RoHS3 compliance status if required by specific regional regulations. Check moisture sensitivity level handling requirements during storage and assembly processes.

Selection Notes

Select this component when a fixed 2.9V rail is required with minimal footprint constraints. Ideal for applications prioritizing low noise and high PSRR over wide frequency ranges. Suitable for designs where input voltage remains close to the output level, leveraging the low dropout特性. Consider thermal dissipation capabilities within the small DFN package under maximum load conditions.

Part Context

Part of the LDK130 family of ultra-low noise LDOs designed for precision analog and RF circuits. Shares core topology with automotive-grade SOT23-5L variants but offers a smaller surface-mount footprint. Designed to replace older generation regulators requiring larger passive components or higher quiescent currents.

Replacement Considerations

Direct pin-compatible alternatives within the same LDK130 series may offer different output voltages or package types such as SOT23-5L. Verify that substitute parts maintain equivalent noise performance and dropout characteristics for sensitive signal chains.