LDK130C10R

Overview

The LDK130C10R is a low-dropout linear voltage regulator manufactured by STMicroelectronics, providing a fixed 1V output with a maximum current of 300mA. It operates within an input voltage range of 1.9V to 5.5V and features a typical dropout voltage of 100mV. The device exhibits a low quiescent current of 60µA and includes logic-controlled electronic shutdown functionality that reduces total current consumption below 1µA. It is housed in a 5-pin SOT-323 package and supports ceramic capacitors for stability.

Feature Summary

• Logic-controlled electronic shutdown function enables ultra-low power consumption in standby modes
• Very low noise characteristics suitable for sensitive analog and RF circuitry
• Internal protection mechanisms include short-circuit constant current limiting and thermal overload shutdown

Applications

• Low-power battery-powered portable devices requiring efficient voltage regulation
• RF modules and wireless communication circuits demanding low-noise power supplies
• Embedded systems utilizing ceramic output capacitors for compact design

Procurement Notes

Verify the specific suffix 'C10R' corresponds to the 1V fixed output variant when sourcing. Confirm the package designation matches the required SOT-323-5 footprint for PCB layout compatibility. Ensure the component meets the specified automotive or industrial temperature ranges if applicable to the target environment. Cross-reference ordering codes with official distributors to avoid counterfeit parts.

Selection Notes

Select this component when a stable 1V rail is required from inputs between 1.9V and 5.5V. It is appropriate for designs prioritizing low quiescent current and minimal noise over high efficiency. Consider the 300mA current limit and dropout voltage constraints relative to the load requirements. Verify compatibility with external ceramic capacitors as per the datasheet recommendations.

Part Context

This part belongs to the LDK130 family of low-dropout regulators designed for low-power applications. The series offers various fixed output voltages ranging from 0.8V to 3.5V in 100mV steps. The LDK130C10R specifically provides the 1V output option within the SOT-323-5 package configuration, maintaining the family's core features of low noise and low static current.

Replacement Considerations

Other LDK130 variants with different output voltages (e.g., LDK130C08R for 0.8V) share identical pinouts and electrical characteristics except for the regulated output level. Ensure the replacement part number matches the required output voltage precisely. Packages such as SOT23-5L and DFN6 are also available within the same family but require mechanical verification.