LDL40PUR

Voltage Regulators - Linear Regulator Controllers Overview

The LDL40PUR is a high-accuracy, low-dropout linear voltage regulator manufactured by STMicroelectronics. It features an adjustable output voltage range from 1.2 V to 12 V and supports a maximum output current of 200 mA. The device operates with an input voltage between 3.3 V and 40 V, enabling compatibility with automotive load dump transients. Key electrical specifications include a typical dropout voltage of 700 mV at full load, a quiescent current of 2 µA, and a power supply rejection ratio (PSRR) of 65 dB. It is housed in a DFN-6 package and meets AEC-Q100 Grade 1 qualification for automotive applications.

Voltage Regulators - Linear Regulator Controllers Feature Summary

• Supports extended input voltage up to 40 V to handle automotive load dump conditions
• Ultra-low quiescent current extends battery life in always-on standby systems
• Logic-controlled shutdown mode reduces total consumption below 0.3 µA
• Integrated thermal protection and internal current limit for robust operation

Voltage Regulators - Linear Regulator Controllers Applications

• Automotive battery-powered systems requiring load dump transient support
• Industrial applications connected directly to generic batteries
• Always-on standby devices needing minimal quiescent current
• Portable electronics requiring stable regulation from varying input sources

Voltage Regulators - Linear Regulator Controllers Procurement Notes

Verify the specific suffix 'UR' against the official datasheet to confirm package type and reel specifications. Ensure the design accounts for the required external ceramic capacitors for stability. Confirm that the application environment stays within the -40 °C to +150 °C junction temperature range specified for this component.

Voltage Regulators - Linear Regulator Controllers Selection Notes

Select this regulator when a wide input voltage range up to 40 V is necessary for automotive or industrial use. It is suitable for designs prioritizing low static current to preserve battery life in standby modes. Consider the DFN-6 footprint constraints and ensure adequate PCB space for the required input and output capacitors to maintain stability under all load conditions.

Voltage Regulators - Linear Regulator Controllers Part Context

The LDL40PUR belongs to the LDL40 series of ultra-tiny low-dropout regulators designed for flexible power solutions. This series emphasizes cost-performance trade-offs for applications where output currents are modest and efficiency is critical. The family includes various fixed and adjustable voltage options, catering to diverse consumer, industrial, and automotive needs while maintaining signal fidelity through high PSRR.

Voltage Regulators - Linear Regulator Controllers Replacement Considerations

Check for other variants within the LDL40 series offering fixed voltages if adjustment is unnecessary. Verify equivalent components from other manufacturers that meet AEC-Q100 Grade 1 standards and offer similar 40 V input tolerance and 200 mA output capability.