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Product Detailed Parameters
- Description：IC REG LINEAR 5V 500MA PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.3V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：800 µA
- Current - Supply (Max)：-
- PSRR：60dB ~ 52dB (120Hz ~ 100kHz)
- Control Features：Enable, Power Good
- Protection Features：Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Supplier Device Package：PPAK
- Grade：-
- Qualification：-
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Overview
The LDFM50PT-TR is a 500 mA very low dropout linear voltage regulator from STMicroelectronics, housed in a compact DFN6 (PPAK) package. It provides a fixed 5 V output with a maximum dropout voltage of 350 mV at full load. The device operates within an input voltage range supporting the specified current and maintains a typical power supply rejection ratio (PSRR) of 60 dB. It functions reliably across an extended temperature range from -40 °C to +125 °C, ensuring stable performance in demanding environments.
Feature Summary
- Very low dropout operation for efficient power management
- Compact DFN6 (PPAK) surface-mount packaging
- High power supply rejection ratio for noise immunity
Applications
- Portable battery-powered equipment
- Embedded systems requiring stable 5 V rails
- Noise-sensitive analog circuits
Procurement Notes
Verify the exact datasheet revision and ordering suffixes when sourcing. Confirm that the PPAK footprint matches your PCB layout constraints. Ensure thermal management strategies account for the small package size under high load conditions. Cross-reference specifications with official STMicroelectronics documentation to avoid compatibility issues.
Selection Notes
Select this component when a fixed 5 V output is required with minimal voltage drop. Consider the PPAK package for space-constrained designs. Evaluate thermal dissipation requirements based on the input-output voltage differential and load current. Verify that the 60 dB PSRR meets the noise sensitivity needs of the application.
Part Context
This part belongs to the LDFM series of low-dropout regulators designed for high efficiency and compactness. The PPAK package offers improved thermal performance compared to traditional SOT packages while maintaining a small footprint. It is intended for applications where power efficiency and board space are critical factors.
Replacement Considerations
Check for direct pin-compatible alternatives such as other 500 mA LDOs in similar packages. Verify electrical parameters like dropout voltage and PSRR match or exceed original requirements. Ensure thermal characteristics are suitable for the target application environment.
