LDLN025J32R

Overview

The LDLN025J32R is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.2 V output with a maximum load current of 250 mA. The device operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 120 mV, with a maximum specified at 200 mV. Key electrical parameters include a quiescent current of 12 uA, line regulation of 0.02 %/V, and load regulation of 0.002 %/mA. It offers high power supply rejection ratio (PSRR) values ranging from 60 dB to 80 dB. The component is housed in a Flip-Chip-4 package and supports operating temperatures from -40°C to +125°C.

Feature Summary

• Ultra-low noise performance with 6.5 μVRMS output noise for sensitive analog circuits
• Fixed 3.2 V output voltage ensuring precise regulation without external feedback components
• High power supply rejection ratio (PSRR) to minimize ripple and noise from the input source
• Compact Flip-Chip-4 package design suitable for space-constrained applications

Applications

• Internet of Things (IoT) devices requiring low power consumption
• Portable battery-powered equipment needing efficient voltage regulation
• RF and communication modules demanding low noise power supplies
• Sensor interfaces requiring stable and accurate voltage levels

Procurement Notes

Verify component status as the LDLN025J32R is listed as End-of-Life and scheduled for obsolescence by the manufacturer. Confirm availability through authorized distributors or check for valid substitute part numbers before procurement planning. Ensure that any alternative components meet the specific electrical requirements such as output voltage, current capacity, and package type to maintain system compatibility.

Selection Notes

Select this regulator when a fixed 3.2 V output is required with minimal external component count. Consider its ultra-low noise characteristic for applications sensitive to power supply interference. Evaluate the 250 mA current capability against the load requirements. The wide input voltage range allows flexibility in battery-operated systems where input voltage may vary significantly during discharge cycles.

Part Context

This component belongs to the LDLN025 series of low-dropout regulators from STMicroelectronics. The series is designed for applications requiring high precision and low power consumption. The J32 suffix indicates the specific 3.2 V fixed output voltage variant. The Flip-Chip-4 package provides a compact footprint compared to traditional leaded packages, facilitating integration into modern, miniaturized electronic designs.

Replacement Considerations

The LP5907UVX-3.2 is identified as a similar available substitute. Verify that the replacement matches the 3.2 V output, 250 mA current rating, and compatible package dimensions. Check if the substitute meets the same noise and PSRR specifications required for the original application.