LDLN025J25R

Overview

The LDLN025J25R is a fixed-output low-dropout (LDO) linear voltage regulator from STMicroelectronics, delivering a precise 2.5 V output with a maximum load current of 250 mA. Designed for noise-sensitive applications, it operates within an input voltage range of 1.5 V to 5.5 V and features ultra-low output noise and high power supply rejection ratio (PSRR). The device incorporates logic-controlled shutdown, internal soft-start, and comprehensive protection mechanisms including thermal and overcurrent limiting.

Feature Summary

• Ultra-low noise performance suitable for sensitive RF and analog loads
• Logic-controlled electronic shutdown for extended battery life in standby modes
• High PSRR ensures clean output despite input line or load variations
• Compact Flip-Chip-4 package optimized for space-constrained mobile designs

Applications

• Voltage regulation for precision Analog-to-Digital Converters (ADCs)
• Powering Voltage-Controlled Oscillators (VCOs) in smartphones and tablets
• Supplying wireless LAN modules and IoT sensor nodes
• Noise-critical sections in wearable fitness monitors and medical sensors

Procurement Notes

Verify the specific suffix 'J' against the manufacturer's official datasheet to confirm the exact output voltage tolerance and temperature grade. Ensure the ordering code matches the required Flip-Chip-4 packaging configuration. Cross-reference the part number with the latest STMicroelectronics documentation to validate availability and any recent design changes before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring minimal output noise and high PSRR for sensitive analog or RF signals. It is appropriate for battery-powered devices where low quiescent current and efficient dropout operation are critical. Consider the Flip-Chip-4 package constraints and ensure adequate thermal management within the target application environment.

Part Context

This part belongs to the LDLN025 series, a family of 250 mA ultra-low noise LDO regulators designed for mobile and portable electronics. The series offers various fixed output voltages and package options, including DFN and SOT-23, to support diverse form factors. It targets applications demanding high performance in small footprints, such as smartphones, smartwatches, and wireless IoT devices.

Replacement Considerations

Consult the official LDLN025 series datasheet for verified alternative part numbers offering different output voltages or package types. Do not substitute with generic LDOs without verifying pin compatibility, noise specifications, and thermal characteristics.