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Product Detailed Parameters
- Description：IC REG LINEAR 1.2V 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)：1.2V
- 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 LDLN025M12R is a 250 mA low-dropout voltage regulator from STMicroelectronics, featuring a fixed 1.2 V output. It operates within an input voltage range of 1.5 V to 5.5 V and delivers a typical dropout voltage of 120 mV at full load. The device exhibits ultra-low quiescent current of 12 μA at no-load and achieves high power supply rejection ratios of 80 dB at 100 Hz and 60 dB at 100 kHz. Output noise is specified at 6.5 μV RMS. It includes logic-controlled shutdown with consumption below 1 μA, internal soft-start, and thermal/overcurrent protection, housed in a compact SOT-23-5L package.
Feature Summary
- Ultra-low noise performance suitable for sensitive analog loads
- Logic-controlled electronic shutdown for extended battery life
- High power supply rejection ratio across frequency ranges
- Integrated thermal and overcurrent protection mechanisms
Applications
- Noise-sensitive loads such as Analog-to-Digital Converters (ADCs)
- Voltage Controlled Oscillators (VCOs) in mobile phones and tablets
- Wireless Local Area Network (WLAN) devices
Procurement Notes
Verify the specific suffix 'M12R' against official STMicroelectronics documentation to confirm the fixed 1.2 V output voltage and SOT-23-5L packaging configuration. Ensure compatibility with required ceramic output capacitors for stability. Cross-reference the part number with authorized distributors to validate authenticity and avoid counterfeit components.
Selection Notes
Select this component when designing battery-powered systems requiring minimal standby current and clean power for RF or precision analog circuits. The SOT-23-5L package offers space efficiency for portable electronics. Consider the 1.2 V fixed output constraint and ensure the input voltage remains within the 1.5 V to 5.5 V operational window for proper regulation.
Part Context
This part belongs to the LDLN025 series of ultra-low noise LDO regulators. The series provides 250 mA output current with various fixed voltage options ranging from 1 V to 5 V. It is designed for applications demanding high PSRR and low quiescent current, available in multiple small packages including DFN4 and Flip-Chip4.
Replacement Considerations
Check for other LDLN025 variants with different output voltages or packages if 1.2 V is not required. Verify pinout compatibility before substituting with similar LDOs from other manufacturers.
