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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 5A TO263
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：29V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：27.5V
- Voltage Dropout (Max)：1.5V @ 5A
- Current - Output：5A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：75dB (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 LM1084IS-ADJ/NOPB is a positive adjustable low-dropout linear regulator manufactured by Texas Instruments. It provides up to 5A output current with a maximum dropout voltage of 1.5V at full load. The device supports an input voltage range up to 29V and delivers an adjustable output voltage from 1.25V to 27.5V. Key electrical specifications include a typical quiescent current of 5mA to 10mA, a power dissipation rating of 30W, and a PSRR of 75dB at 120Hz. It operates within an industrial temperature range of -40°C to +125°C and features built-in thermal shutdown and current limiting protection.
Feature Summary
- Provides high continuous output current capability suitable for demanding power applications
- Maintains stable regulation with minimal voltage drop between input and output terminals
- Integrates comprehensive protection mechanisms including thermal shutdown and current limiting
Applications
- Post-regulation stages for switching DC/DC converters
- Battery charger circuits requiring precise voltage control
- Industrial control systems needing reliable linear power sources
Procurement Notes
Verify the specific suffix (e.g., NOPB) to confirm lead-free compliance and packaging type. Ensure the TO-263 package variant matches your PCB footprint requirements. Confirm that the thermal management solution meets the 30W dissipation needs under your specific operating conditions. Check for moisture sensitivity levels if storage duration exceeds factory limits.
Selection Notes
Choose this component when high current delivery is required alongside low noise and simple circuit topology. It serves as a direct pin-compatible alternative to older standards like the LM317 but with superior current handling. Consider the thermal resistance of the TO-263 package and ensure adequate heatsinking for high differential voltage scenarios to prevent thermal throttling.
Part Context
This part belongs to the LM1084 family of 5A low-dropout regulators. It shares architectural similarities with other TI LDOs but is distinct in its specific current rating and package options. The series includes fixed voltage variants and different package styles such as TO-220 and SOT-223, catering to diverse thermal and spatial constraints in power supply designs.
Replacement Considerations
LM1084ISX-ADJ/NOPB
FAQ
How is the output voltage determined for this adjustable regulator?
The output voltage is set using two external resistors connected to the adjust pin, allowing for a programmable range typically starting from 1.25V.
What protection features are integrated into the LM1084IS-ADJ?
The device includes internal current limiting and thermal shutdown circuits to protect against overload conditions and excessive heat generation.
