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Product Detailed Parameters
- Description：IC REG LINEAR 12V 5A TO263
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：12V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.5V @ 5A
- Current - Output：5A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：60dB (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-12/NOPB is a positive linear voltage regulator from Texas Instruments, delivering a fixed 12V output at up to 5A. It utilizes a TO-263 (DDPAK-3) surface-mount package with an exposed thermal pad for efficient heat dissipation. The device features a maximum dropout voltage of 1.5V at full load and supports input voltages up to 29V. Integrated protections include overcurrent limiting and thermal shutdown, ensuring reliability across an operating temperature range of -40°C to +125°C.
Feature Summary
- Fixed 12V output configuration for stable power supply applications
- High current capability of 5A with low dropout performance
- Integrated thermal and current protection mechanisms
Applications
- Point-of-load regulation in embedded systems
- Power supplies for microprocessors and FPGAs
- Battery-powered equipment requiring efficient step-down conversion
Procurement Notes
Verify the suffix NOPB indicates lead-free/RoHS compliance per Texas Instruments specifications. Confirm the package designation ISX corresponds to the TO-263 (DDPAK-3) form factor. Ensure the fixed 12V output variant matches the circuit design requirements, as other voltage options exist within the LM1084 family.
Selection Notes
Select this component when a fixed 12V rail is required at high currents. Compare dropout voltage characteristics against input supply variations. Consider thermal management solutions due to the 30W power dissipation potential. Verify that the TO-263 footprint aligns with the PCB layout constraints.
Part Context
This part belongs to the LM1084 series of 5A low-dropout positive regulators. It shares architectural similarities with the LM1085 and LM1086 but offers higher current capacity. The series is designed for general-purpose linear regulation where efficiency and simplicity are prioritized over switching converter complexity.
Replacement Considerations
Direct substitutes include LM1084ISX-12/NOPB equivalents from other manufacturers if pin-compatible. For adjustable versions, consider LM1084ISX-ADJ/NOPB with external resistors. Fixed voltage alternatives like LM1084ISX-5.0/NOPB or LM1084ISX-3.3/NOPB serve different output needs.
