LDK130C29R

Overview

The LDK130C29R is a low-dropout linear voltage regulator from STMicroelectronics, providing a fixed 2.9 V output with a maximum current of 300 mA. It operates within an input voltage range of 1.9 V to 5.5 V and features a typical dropout voltage of 100 mV at 100 mA load. The device exhibits a low quiescent current of 30 μA and consumes less than 1 μA in shutdown mode. It offers an output voltage tolerance of ±2.0% at 25 °C and is stabilized by a 1 μF ceramic capacitor on the output.

Feature Summary

• Logic-controlled electronic shutdown function enables ultra-low power consumption in standby modes.
• Internal protection mechanisms include short-circuit constant current limiting and thermal overload protection.
• Compatible with small-footprint ceramic output capacitors for stable operation without additional bulk capacitance.

Applications

• Low-power battery-powered consumer electronics
• Automotive sensor nodes requiring AEC-Q100 Grade 1 qualification
• Noise-sensitive RF or analog signal conditioning circuits

Procurement Notes

Verify the specific suffix 'C29R' corresponds to the 2.9 V fixed output variant and SOT23-5L package configuration. Confirm that the procurement order explicitly references the automotive-grade AEC-Q100 qualification if required for the target application environment. Ensure compatibility with the specified 1 μF ceramic output capacitor requirement for stability.

Selection Notes

Select this component when a fixed 2.9 V rail is needed with minimal noise and high efficiency under light loads. The wide input range accommodates single-cell lithium batteries. Consider the SOT23-5L package for space-constrained designs. Verify that the 300 mA load capability meets the peak current demands of the downstream circuitry without exceeding thermal limits.

Part Context

This part belongs to the LDK130 family of low-dropout regulators designed for automotive and industrial applications. The family offers various fixed output voltages ranging from 0.8 V to 3.5 V in 100 mV steps. Other variants share similar electrical characteristics but differ in output voltage settings and available package options such as DFN6 and SOT323-5L.

Replacement Considerations

Direct substitutes within the LDK130 series include other fixed-voltage variants like LDK130C33R (3.3 V) or LDK130C18R (1.8 V), provided the system voltage requirements are adjusted accordingly. Cross-family replacements require verification of pinout compatibility, dropout voltage characteristics, and noise specifications against the original design constraints.