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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 3A TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：14V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 3A
- Current - Output：3A
- Current - Quiescent (Iq)：50 mA
- Current - Supply (Max)：100 mA
- PSRR：67dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The LD29300V33 is a fixed-output low-dropout voltage regulator providing 3.3 V with ±1% tolerance at 25°C. It guarantees up to 3 A output current and features a typical dropout voltage of 0.4 V at full load. The device includes internal current and thermal limits, logic-controlled electronic shutdown, and operates within a junction temperature range of -40 to 125°C.
Feature Summary
- Very low dropout voltage for high efficiency under heavy loads
- High accuracy fixed output voltage regulation
- Integrated protection against overcurrent and overheating
- Logic-controlled electronic shutdown capability
Applications
- Power supply switching post-regulation
- Series power supply for monitors
- Computer systems
- Battery-powered systems
Procurement Notes
Verify the specific package variant (TO-220, D2PAK, P2PAK) required for your design, as the base part number corresponds to multiple physical packages. Confirm that the 3.3 V fixed version matches your system requirements. Ensure input voltage exceeds the minimum operating threshold to maintain regulation. Check for any specific environmental compliance markings on the packaging.
Selection Notes
Select this component when high current delivery near the input voltage rail is necessary. The low dropout characteristic makes it suitable for battery applications where maximizing usable energy is critical. Consider thermal management requirements due to power dissipation at high currents. Verify compatibility with the required output capacitor for stability.
Part Context
This device belongs to the LD29300xx series of high-current, very low drop voltage regulators from STMicroelectronics. The series offers various fixed output voltages and an adjustable version. It is designed for applications requiring robust performance under high load conditions with minimal voltage loss across the regulator.
Replacement Considerations
Other members of the LD29300xx family with different output voltages or packages may serve as functional substitutes if voltage levels are adjusted accordingly.
