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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 3A 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)：15V
- Voltage Dropout (Max)：1.5V @ 3A
- Current - Output：3A
- 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 (TJ)
- 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 LM1085IS-ADJ/NOPB is a 3A low dropout positive linear regulator from Texas Instruments. It features an adjustable output voltage range of 1.25V to 33V, set by two external resistors. The device supports a maximum input voltage of 29V and operates within a junction temperature range of -40°C to +125°C. Key electrical parameters include a typical line regulation of 0.015% and load regulation of 0.1%. It incorporates internal current limiting and thermal shutdown protection. The component is housed in a surface-mount TO-263 (DDPAK-3) package.
Feature Summary
- Adjustable output voltage configuration via external resistors
- Integrated current limit and thermal shutdown protection
- Low dropout operation for high efficiency
- Surface-mount TO-263 package design
Applications
- Battery chargers
- Post-regulators for switching converters
- Linear power supplies
- On-card regulation
Procurement Notes
Verify the specific suffix 'NOPB' indicates lead-free/RoHS compliance status. Confirm the package type matches the required PCB footprint. Check for obsolescence notices or lifecycle changes from the manufacturer before finalizing procurement plans.
Selection Notes
Select this component when an adjustable output voltage up to 33V is required with 3A current capability. Ensure the input voltage does not exceed 29V. Consider thermal management requirements due to power dissipation at high currents and differential voltages.
Part Context
This part belongs to the LM1085 series of 3A low dropout regulators. It shares pinout compatibility with industry-standard LM317 devices but offers improved dropout voltage characteristics. The series includes fixed voltage variants alongside the adjustable version.
Replacement Considerations
LM1085IS-ADJ/NOPB is the direct lead-free equivalent of earlier versions. No other specific substitute part numbers are publicly confirmed for direct replacement.
