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Product Detailed Parameters
- Description：IC REG LINEAR 2.8V 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)：2.8V
- 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 LDLN025M28R is a fixed-output low-dropout linear regulator from STMicroelectronics, providing a stable 2.8 V output with a maximum load current of 250 mA. It operates within an input voltage range of 1.5 V to 5.5 V and features ultra-low quiescent current of 12 μA at no-load. The device delivers high power supply rejection ratio (PSRR) of 80 dB at 100 Hz and maintains ultra-low output noise below 6.5 μV RMS. It includes logic-controlled shutdown consuming less than 1 μA, internal soft-start, and thermal/overcurrent protection, housed in a compact SOT-23-5 package.
Feature Summary
- Ultra-low noise performance suitable for sensitive RF and analog loads
- Logic-controlled electronic shutdown for extended battery life
- High power supply rejection ratio across frequency ranges
- Integrated safety protections including thermal and overcurrent limiting
Applications
- Voltage regulation for precision Analog-to-Digital Converters (ADCs)
- Power supply for Voltage-Controlled Oscillators (VCOs) in mobile devices
- Noise-sensitive power stages in wireless IoT sensors
- Portable medical sensor equipment requiring clean power rails
Procurement Notes
Verify the suffix 'R' indicates reel packaging when ordering. Confirm the specific output voltage variant matches the design requirement, as the LDLN025 series offers multiple fixed voltage options. Ensure the SOT-23-5 footprint aligns with the PCB layout specifications before finalizing procurement.
Selection Notes
Select this component for applications demanding minimal noise floor and low standby current. It is ideal for battery-powered systems where quiescent current significantly impacts overall runtime. Consider the 2.8 V fixed output if it matches the target circuit rail requirements without needing external resistors.
Part Context
This part belongs to the LDLN025 family of 250 mA ultra-low noise LDO regulators designed by STMicroelectronics. The series targets space-constrained portable electronics, offering various fixed output voltages and small form-factor packages like DFN and Flip-Chip to support modern miniaturization trends.
Replacement Considerations
Check for other LDLN025 variants with different output voltages or package types if pin compatibility is required. Verify that alternative LDOs maintain similar PSRR and noise specifications to ensure signal integrity is preserved in sensitive analog circuits.
