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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 5A TO263
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：27V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.5V @ 5A
- Current - Output：5A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：72dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Supplier Device Package：TO-263 (DDPAK-3)
- Grade：-
- Qualification：-
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Overview
The LM1084ISX-3.3/NOPB is a Texas Instruments positive linear voltage regulator in the LM1084 series, housed in a D2PAK-3 (TO-263-3) surface-mount package. It provides a fixed 3.3 V output with a maximum current of 5 A. The device supports an input voltage range from 2.6 V to 27 V and operates within a temperature range of -40°C to +125°C. Key electrical specifications include a typical dropout voltage of 1.3 V at full load, a maximum of 1.5 V at 5 A, and a quiescent current of 10 mA. It features a typical power supply rejection ratio (PSRR) of 68 dB at 120 Hz.
Feature Summary
- Provides a stable fixed 3.3 V output for high-current applications up to 5 A
- Operates efficiently with low dropout voltage under heavy loads
- Includes internal thermal overload and current limit protection for system safety
Applications
- Embedded systems requiring regulated 3.3 V logic power
- Battery-powered devices needing efficient linear regulation
- Industrial control modules and sensor interfaces
Procurement Notes
Verify the complete part number including the /NOPB suffix to ensure lead-free compliance and specific packaging configuration. Confirm the TO-263-3 package variant matches your PCB footprint requirements. Check manufacturer datasheets for updated moisture sensitivity levels and handling instructions prior to assembly.
Selection Notes
Select this component when a fixed 3.3 V rail is required with up to 5 A capacity. Consider the D2PAK-3 package for surface-mount efficiency and thermal performance. Ensure input voltage remains within the 2.6 V to 27 V range and verify that ambient temperatures stay within the specified -40°C to +125°C operational limits.
Part Context
This device belongs to the LM1084 family of adjustable and fixed positive regulators. It shares core architecture with variants like the LM1084ISX-ADJ/NOPB but offers a fixed output. The series is designed for general-purpose power management in consumer and industrial electronics, balancing cost, performance, and robustness.
Replacement Considerations
Direct substitutes include other LM1084ISX-3.3 variants from Texas Instruments. Cross-referencing with similar LDOs requires matching the 5 A current rating, 3.3 V output, and TO-263-3 package dimensions.
