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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 500MA PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：1 mA
- Current - Supply (Max)：12 mA
- PSRR：80dB ~ 65dB (120Hz ~ 65dB)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- 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 LF33ABPT-TR is a fixed-output linear voltage regulator from STMicroelectronics, providing a stable 3.3V output with a maximum load current of 0.5A. It operates within an input voltage range of -0.5V to 40V and features a typical dropout voltage of 0.45V at full load. The device incorporates an inhibit function for power management and is housed in a surface-mount PPAK package. It supports operation up to a maximum junction temperature of 125°C and meets AEC-Q100 automotive qualification standards.
Feature Summary
- Integrated inhibit control pin for precise power sequencing and system shutdown capabilities
- Very low dropout voltage characteristic ensures efficient regulation under minimal input-output differential conditions
- Designed for low-noise and low-power applications suitable for sensitive analog circuits
- Automotive-grade reliability compliant with AEC-Q100 stress test requirements
Applications
- Multi-output power supply systems requiring sequential voltage regulation
- Battery-powered electronic devices prioritizing energy efficiency
- Low-noise analog circuit power conditioning
- Automotive embedded control modules
Procurement Notes
Verify the specific suffix 'TR' indicates tape-and-reel packaging configuration. Confirm the PPAK package variant matches your PCB footprint requirements. Ensure the inhibit pin logic levels align with your control interface. Validate that the 0.5A continuous current rating suffices for peak load demands without exceeding thermal limits.
Selection Notes
Select this component when a compact surface-mount solution with integrated enable/disable functionality is required. It is appropriate for designs needing high input voltage tolerance up to 40V while maintaining a fixed 3.3V output. Consider thermal dissipation constraints due to the small PPAK package size when operating near maximum current ratings.
Part Context
This part belongs to the LFxx series of very low drop regulators from STMicroelectronics. The series offers various fixed output voltages optimized for battery-operated systems. The LF33ABPT-TR specifically integrates an inhibit feature not present in standard LDO variants, enhancing system power management flexibility.
Replacement Considerations
Direct substitutes include other LF33ABPT-TR units from authorized distributors. Cross-reference with LF33ABDT-TR if DPAK packaging is acceptable instead of PPAK. Verify equivalent inhibit functionality and current ratings before substituting with generic 3.3V LDOs.
