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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 5A TO263
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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 LM1084ISX-ADJ/NOPB is a Texas Instruments adjustable positive low-dropout linear regulator. It delivers up to 5A output current with a maximum dropout voltage of 1.5V at full load. The device operates within an input voltage range of 2.6V to 29V and provides an adjustable output voltage from 1.25V to 27.5V. It features a typical power supply rejection ratio (PSRR) of 75dB at 120Hz and a quiescent current of 10mA. The component is housed in a surface-mount D2PAK-3 (TO-263-3) package and supports an industrial operating temperature range from -40°C to +125°C.
Feature Summary
- Provides high-current regulation capability up to 5A for demanding power applications
- Incorporates internal thermal shutdown and current limiting protection mechanisms
- Features low dropout voltage characteristics for efficient power conversion
- Offers adjustable output voltage configuration via external resistors
Applications
- Post-regulation stage for switching DC/DC converters
- Battery charger circuits requiring stable voltage control
- Offline switcher power supplies
- General-purpose linear regulation in industrial equipment
Procurement Notes
Verify the specific suffix 'NOPB' confirms RoHS compliance and lead-free status as per manufacturer specifications. Confirm the 'ISX' designation indicates the D2PAK-3 surface mount package variant. Ensure the 'ADJ' identifier matches the requirement for an adjustable output version rather than a fixed voltage alternative. Cross-reference the datasheet revision history for any updates to electrical characteristics or recommended application circuits before finalizing procurement.
Selection Notes
Select this component when an adjustable output voltage is required alongside high current capacity. The TO-263 package offers a balance between thermal performance and board space efficiency. Consider the 1.5V dropout voltage at 5A when calculating minimum input-output differential requirements. Evaluate thermal management needs based on the expected power dissipation in the target application environment.
Part Context
This part belongs to the LM1084 family of 5A low-dropout regulators produced by Texas Instruments. It shares functional similarities with other members like the LM1084IS-5.0 but differs in output configuration. The series is designed to replace older standards like the LM317 while offering improved current handling and lower dropout performance in a robust surface-mount form factor suitable for modern PCB designs.
Replacement Considerations
Direct pin-compatible substitutes include other LM1084 variants such as LM1084ISX-5.0/NOPB for fixed voltage needs, though output configuration differs. Verify thermal resistance values if replacing with non-TI equivalents to ensure adequate heat dissipation in the D2PAK package.
