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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 500MA 8-DFN
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6.5V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.5V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：65 µA
- Current - Supply (Max)：120 µA
- PSRR：65dB ~ 38dB (100Hz ~ 100kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：8-VDFN Exposed Pad
- Supplier Device Package：8-DFN (3x3)
- Grade：-
- Qualification：-
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Overview
The LDLN050PU33RY is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum load current of 500 mA. The device operates within an input voltage range of up to 6.5 V and maintains performance across an extended temperature range from -40°C to +125°C. Key electrical characteristics include a quiescent current of 65 µA and a typical output noise of 13 µVRMS/VOUT. It is housed in an 8-pin DFN package (3 × 3 mm) designed for surface-mount applications.
Feature Summary
- Automotive-grade reliability certified under AEC-Q100 standards
- Ultra-low output noise suitable for sensitive RF circuits
- Compact footprint optimized for space-constrained designs
Applications
- RF modules requiring low-noise power supplies
- Automotive electronic control units
- Portable battery-powered devices
Procurement Notes
Verify the specific suffix codes against official STMicroelectronics documentation to confirm exact packaging and tape-and-reel specifications. Ensure compatibility with your PCB thermal design requirements given the DFN package type. Cross-reference the datasheet revision date to ensure all electrical parameters match your design constraints before finalizing procurement orders.
Selection Notes
Select this component when a fixed 3.3 V rail is required with minimal noise interference. The 500 mA capacity supports moderate load currents while maintaining efficiency through low quiescent consumption. Consider the 6.5 V maximum input limit and the specific thermal dissipation capabilities of the 8-DFN package during initial circuit planning.
Part Context
This part belongs to the LDLN series of low-dropout regulators, which are engineered for high-performance analog and digital applications. The series emphasizes low noise and high power supply rejection ratio (PSRR), making it distinct from standard general-purpose LDOs. It integrates protection features common to automotive-grade PMICs.
Replacement Considerations
Consult official cross-reference lists for direct pin-compatible alternatives. Verify that any substitute matches the 3.3 V fixed output, 500 mA current rating, and AEC-Q100 qualification status.
