LD39130SPUR

Overview

The LD39130SPUR is a low-dropout linear voltage regulator from STMicroelectronics, designed for high-precision power management in compact electronic systems. It delivers a maximum output current of 300 mA with an input voltage range spanning 1.4 V to 5.5 V. The device features a typical dropout voltage of 300 mV at full load and offers an adjustable output voltage range from 0.8 V to 4.0 V in 100 mV steps. Operating with a quiescent current as low as 1 µA in green mode and 45 µA in normal mode, it ensures efficient power usage. The regulator includes internal logic for automatic green mode switching, soft start, and protection against overcurrent and thermal overload.

Feature Summary

• Integrates automatic green mode operation that minimizes static current consumption during light-load conditions while maintaining fast transient response under heavy loads.
• Provides precise voltage regulation with a tight tolerance of ±1.0% at 25 °C, ensuring stable output across varying line and load conditions.
• Incorporates comprehensive protection mechanisms including current foldback overload protection and thermal shutdown to safeguard the device and connected circuitry.

Applications

• Battery-powered portable devices requiring ultra-low quiescent current
• Space-constrained embedded systems utilizing small footprint packages
• Low-noise analog circuits demanding stable linear regulation

Procurement Notes

Verify the specific suffix 'PUR' against official STMicroelectronics documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and lead time constraints directly with authorized distributors, as availability may vary. Ensure the selected variant matches the required output voltage adjustment range and thermal performance for your specific application environment.

Selection Notes

Select this component when designing systems that require a wide input voltage range down to 1.4 V and need an adjustable output between 0.8 V and 4.0 V. It is suitable for applications prioritizing low power consumption in standby modes due to its green mode feature. Consider the DFN-6 package size if board space is limited, and ensure compatibility with ceramic output capacitors for stability.

Part Context

The LD39130 series belongs to STMicroelectronics' portfolio of low-dropout regulators optimized for battery-operated equipment. This family emphasizes minimal footprint and energy efficiency, targeting modern mobile and IoT applications where power conservation and physical size are critical design constraints.

Replacement Considerations

Consult STMicroelectronics datasheets for direct pin-compatible alternatives within the LD39130S family or other LDOs with similar 300 mA output and adjustable voltage ranges. Verify electrical parameters such as dropout voltage and quiescent current match before substitution.