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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 250MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.2V @ 250mA
- Current - Output：250mA
- Current - Quiescent (Iq)：25 µA
- Current - Supply (Max)：425 µA
- PSRR：80dB ~ 60dB (100Hz ~ 100KHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Short Circuit, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LDLN025M18R is a low-dropout linear voltage regulator from the LDLN025 series, manufactured by STMicroelectronics. It provides a fixed output voltage of 1.8 V with a maximum continuous output 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 at full load. Key electrical parameters include a quiescent current of 425 μA, a power supply rejection ratio (PSRR) of 60 dB at 100 kHz, and an output voltage accuracy of 2%. It incorporates internal soft-start, overcurrent protection, and thermal shutdown.
Feature Summary
- Ultra-low noise performance suitable for sensitive analog loads
- Logic-controlled electronic shutdown for extended battery life
- Stable operation with small ceramic output capacitors
Applications
- Voltage regulation for Analog-to-Digital Converters (ADCs)
- Power supply for Voltage Controlled Oscillators (VCOs) in mobile devices
- Noise-sensitive circuits in wireless LAN equipment
Procurement Notes
Verify the specific package type upon ordering, as the LDLN025 series utilizes multiple form factors including SOT-23-5L and DFN. Confirm that the 1.8 V fixed output variant matches the system design requirements. Ensure compatibility with the required input voltage range and load conditions before finalizing procurement decisions.
Selection Notes
Select this component when ultra-low noise and high PSRR are critical for signal integrity in portable electronics. The device is appropriate for applications requiring precise voltage regulation under varying load conditions while maintaining low power consumption during standby modes through its enable pin functionality.
Part Context
This part belongs to the LDLN025 family of ultra-low noise LDO regulators designed for battery-powered consumer electronics. The series offers various fixed output voltages and packaging options to accommodate different space and performance constraints in compact mobile and wearable devices.
Replacement Considerations
Direct substitutes within the same family include other LDLN025 variants with different fixed output voltages or packages, such as LDLN025J50R or LDLN025PU12R, provided the output voltage requirement is adjusted accordingly.
