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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 3A D2PAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：14V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 3A
- Current - Output：3A
- Current - Quiescent (Iq)：50 mA
- Current - Supply (Max)：100 mA
- PSRR：72dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Supplier Device Package：D2PAK
- Grade：-
- Qualification：-
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Overview
The LD29300D2T18R is a fixed-output linear low-dropout voltage regulator manufactured by STMicroelectronics. It provides a nominal output voltage of 1.8 V with a guaranteed maximum output current of 3 A. The device operates within an input voltage range up to 30 V, though automatic shutdown occurs above 14 V. Key electrical parameters include a typical dropout voltage of 0.4 V at full load and a quiescent current of 50 mA at 1.5 A load. It features ±1% output voltage tolerance at 25 °C and includes internal thermal and current limiting protections.
Feature Summary
- Very low dropout voltage characteristic for high efficiency under minimal headroom conditions
- Logic-controlled electronic shutdown function for power management
- Internal protection against overcurrent and thermal overload
Applications
- Power supply switching post regulation
- Series power supply for monitors
- Computer systems
- Battery-powered systems
Procurement Notes
Verify the specific suffix 'D2T' indicates the D2PAK package configuration and tape-and-reel delivery format as per manufacturer order codes. Confirm that the part number corresponds to the 1.8 V fixed output variant. Ensure compatibility with ECOPACK lead-free packaging standards if environmental compliance is required for the assembly process.
Selection Notes
Select this component when a stable 1.8 V rail is required for loads up to 3 A. The D2PAK package offers suitable thermal dissipation for surface-mount applications. Consider the automatic shutdown behavior at input voltages exceeding 14 V during system design to ensure proper operating margins are maintained.
Part Context
This device belongs to the LD29300xx series of high-current, high-accuracy low-dropout regulators. The series encompasses various fixed output voltages and adjustable versions across multiple packages including TO-220, D2PAK, and P2PAK. The LD29300D2T18R specifically utilizes the D2PAK form factor for the 1.8 V fixed output option.
Replacement Considerations
LD29300D2M18R (Same voltage and package, different reel type)
FAQ
What happens if the input voltage exceeds 14 V?
The device enters an automatic shut-down mode if the DC input voltage exceeds 14 V.
Is the LD29300D2T18R available in an adjustable version?
No, the LD29300D2T18R is a fixed-output regulator providing 1.8 V. Adjustable versions exist within the series but have different part numbers.
