LDS3985M30R

Overview

The LDS3985M30R is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics. It provides a stable positive output voltage of 3.0 V with a maximum continuous output current capability of 300 mA. The device operates within an input voltage range from 2.5 V to 6 V and features ultra-low dropout characteristics, specified at a maximum of 150 mV under typical conditions. Quiescent current consumption is maintained at approximately 150 µA. The component is housed in a compact SOT-23-5 surface-mount package and is rated for operation across an extended temperature range from -40°C to +125°C.

Feature Summary

• Ultra-low dropout performance ensures efficient regulation with minimal voltage loss between input and output.
• Integrated shutdown control allows for effective power management and reduced standby consumption.
• Built-in protection mechanisms include overcurrent limiting and thermal shutdown to safeguard the device during fault conditions.

Applications

• Portable battery-powered consumer electronics requiring stable low-voltage rails
• Wireless communication modules and sensors needing precise voltage regulation
• Embedded systems utilizing microcontrollers or memory components

Procurement Notes

Verify the specific suffix 'M30R' to confirm the 3.0 V fixed output voltage variant. Ensure compatibility with the SOT-23-5 footprint and check RoHS compliance status against current manufacturing standards. Confirm that the required output current does not exceed the 300 mA limit under all operating conditions.

Selection Notes

Select this component when a fixed 3.0 V supply is required with minimal quiescent current draw. It is suitable for space-constrained designs due to the small SOT-23-5 package. Consider the input voltage range and thermal dissipation requirements relative to the load current and ambient temperature.

Part Context

This part belongs to the LDS3985 series of ultra-low-dropout regulators from STMicroelectronics. The series offers various fixed output voltages and shares common architectural features such as high PSRR and robust protection circuits. It is designed for applications demanding high efficiency and low noise in portable devices.

Replacement Considerations

Direct substitutes within the same family include other LDS3985 variants with different output voltages, such as LDS3985M18R (1.8 V) or LDS3985M33R (3.3 V), provided the voltage requirement matches. Verify pinout and package compatibility before substitution.