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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 1.5A PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.4V @ 1.5A
- Current - Output：1.5A
- Current - Quiescent (Iq)：2.5 mA
- Current - Supply (Max)：-
- PSRR：65dB ~ 55dB (120Hz ~ 1kHz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- 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 LD39150PT33-R is a positive fixed-output linear voltage regulator from STMicroelectronics, delivering 1.5 A with a 3.3 V output. It operates on a 2.5 V to 6 V input supply using a BiCMOS process. Key electrical parameters include a typical dropout voltage of 40 mV at 300 mA and 200 mV at 1.5 A load. Quiescent current is 1 mA typ. at full load, dropping to 1 μA max in off mode. Output tolerance is ±1.5% at 25 °C. The device features logic-controlled shutdown, thermal and current limiting, and stability with ceramic capacitors. Operating temperature range is -40 °C to 125 °C TJ.
Feature Summary
- Ultra-low dropout voltage performance ensures efficient regulation under heavy loads.
- Logic-controlled electronic shutdown minimizes power consumption in standby modes.
- BiCMOS technology enables low quiescent current independent of output load.
- Inherent protection against overcurrent and thermal overload conditions.
Applications
- Low voltage microprocessor power supplies
- Memory circuit powering
- Battery-powered portable devices
Procurement Notes
Verify the specific suffix 'PT33-R' corresponds to the PPAK package and 3.3 V fixed output variant. Confirm RoHS compliance status and check for any product change notices (PCN) regarding manufacturing site or material updates. Ensure the ordering part number matches the required tape-and-reel quantity specifications for your assembly line.
Selection Notes
Select this component when high current capability up to 1.5 A is required alongside minimal voltage drop. The fixed 3.3 V output eliminates external resistor networks. Verify that the input voltage remains within the 2.5 V to 6 V range. Consider the PPAK package for thermal management needs compared to smaller footprints.
Part Context
This part belongs to the LD39150 family of ultra-low drop regulators. It shares core architecture with variants like LD39150PU33R but differs in packaging. The PT suffix indicates the PPAK surface-mount package type. It serves as a PMIC solution for stable voltage regulation in space-constrained designs requiring high efficiency.
Replacement Considerations
LD39150PU33R is a documented substitute offering identical electrical characteristics in a 6-DFN package. Verify pinout compatibility and thermal dissipation requirements before swapping packages. No functional changes are implied by the package difference alone.
