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Product Detailed Parameters
- Description：IC REG LINEAR 1.2V 250MA 4-DFN
- 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)：0.25V @ 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：4-XDFN Exposed Pad
- Supplier Device Package：4-DFN (1x1)
- Grade：-
- Qualification：-
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Overview
The LDLN025PU12R is a fixed-output linear low-dropout regulator from STMicroelectronics, providing a stable 1.2 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 a typical dropout voltage of 120 mV at full load. The device incorporates ultra-low quiescent current of 12 μA at no-load and less than 1 μA in shutdown mode. It delivers an ultra-low output noise of 6.5 μV RMS and high power supply rejection ratio (PSRR) of 80 dB at 100 Hz. Integrated protections include overcurrent, thermal shutdown, and internal soft-start.
Feature Summary
- Ultra-low output noise suitable for precision analog circuits
- Logic-controlled electronic shutdown for extended battery life
- High power supply rejection ratio for clean signal integrity
- Integrated thermal and overcurrent protection mechanisms
Applications
- Powering precision analog-to-digital converters
- Voltage regulation for voltage-controlled oscillators in mobile devices
- Noise-sensitive wireless local area network components
Procurement Notes
Verify the specific suffix PU12R confirms the 1.2 V fixed output and 4-DFN package configuration. Ensure compatibility with ceramic capacitors as required for stability. Confirm RoHS3 compliance and check for any recent manufacturing changes via official product change notices before finalizing procurement orders.
Selection Notes
Select this component when designing space-constrained portable electronics requiring minimal static current consumption. It is appropriate for applications needing precise voltage regulation under varying load conditions without external feedback resistors. Consider the 4-DFN footprint for PCB layout optimization where small form factors are critical.
Part Context
This part belongs to the LDLN025 series of ultra-low noise LDO regulators designed for sensitive loads. The series offers various fixed output voltages and package options including DFN and SOT-23. It targets consumer electronics and IoT devices where power efficiency and signal purity are paramount requirements for system performance.
Replacement Considerations
Other variants within the LDLN025 family offer different fixed output voltages or alternative packages such as SOT-23-5. Verify that substitute parts maintain the same 250 mA current rating and low-noise specifications to ensure circuit functionality remains unchanged.
