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Product Detailed Parameters
- Description：IC REG LIN 1.2V 250MA 4-FLIPCHIP
- 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：4-XFBGA, FCBGA
- Supplier Device Package：4-FlipChip (0.63x0.63)
- Grade：-
- Qualification：-
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Overview
The LDLN025J12R is a low-dropout linear voltage regulator from STMicroelectronics, designed for noise-sensitive applications. It operates within an input voltage range of 1.5 V to 5.5 V and provides a fixed output voltage of 1.2 V. The device supports up to 250 mA output current with a typical dropout voltage of 120 mV at full load. Key electrical characteristics include ultra-low output noise of 6.5 µVRMS and high power supply rejection ratio (PSRR) of 80 dB at 100 Hz. Quiescent current is 12 µA at no-load, dropping below 1 µA in shutdown mode via logic control. It features internal soft-start, overcurrent protection, thermal shutdown, and output discharge.
Feature Summary
- Ultra-low output noise suitable for precision analog loads
- Logic-controlled electronic shutdown for extended battery life
- Internal soft-start and comprehensive protection mechanisms
Applications
- Powering ADCs in measurement systems
- Supplying VCOs in mobile phones and tablets
- Powering wireless LAN devices
Procurement Notes
Verify the specific suffix 'J12R' against official datasheets to confirm the 1.2 V fixed output voltage and SOT-23-5L package configuration. Ensure compatibility with required ceramic capacitor values for stability. Cross-reference part numbers with authorized distributors to avoid counterfeit components.
Selection Notes
Select this component when ultra-low noise performance is critical for sensitive RF or analog circuits. The 1.2 V fixed output eliminates external resistor networks, simplifying design. Consider the SOT-23-5L package for space-constrained PCB layouts. Verify that the 250 mA current capability meets system peak load requirements.
Part Context
This part belongs to the LDLN025 series of 250 mA ultra-low noise LDO regulators. The series offers various fixed output voltages and package options including DFN4 and Flip-Chip4. It targets portable electronics requiring long standby times and clean power supplies for sensitive sensors and communication modules.
Replacement Considerations
Check for other LDLN025 variants with different output voltages if 1.2 V is not required. Verify pinout compatibility with existing PCB footprints before substituting with other packages like DFN4.
