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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 operates with an input voltage range of 2.6V to 29V and delivers an adjustable output voltage. The device features a maximum differential input-to-output voltage of 15V and supports junction temperatures up to 125°C. It utilizes a surface-mount D2PAK (TO-263) package with three pins, measuring 10.16mm in length, 8.64mm in width, and 4.57mm in height. The component includes internal overcurrent and thermal shutdown protection mechanisms.
Feature Summary
- Provides adjustable positive output voltage regulation for power supply applications
- Integrates internal overcurrent limiting and thermal shutdown protection circuits
- Designed for surface-mount installation using the D2PAK package format
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulation stages for switching power supplies
- General-purpose power management in industrial equipment
Procurement Notes
Verify the specific suffix designation against official manufacturer documentation to confirm pinout compatibility and functional equivalence. Ensure that the ordering information matches the exact package type and temperature rating required for the target application environment. Cross-reference part numbers with current datasheets to validate availability status and manufacturing lifecycle stage before finalizing procurement decisions.
Selection Notes
Select this component when a fixed 3A LDO solution is insufficient due to varying load requirements necessitating adjustable output voltages. Consider the thermal performance characteristics inherent to the D2PAK package relative to the expected ambient operating conditions. Evaluate the input voltage headroom requirements against the specified dropout voltage limits to ensure stable regulation under all anticipated load and line conditions.
Part Context
This device belongs to the LM1085 family of low dropout regulators manufactured by Texas Instruments. It serves as the adjustable variant within the series, complementing fixed-voltage options such as the LM1085IS-3.3/NOPB. The family shares common design architectures optimized for high-current applications, offering a balance between performance and cost-effectiveness for standard linear regulation tasks.
Replacement Considerations
The LM1085IS-ADJ/NOPB is the lead-free, RoHS-compliant version of the LM1085IS-ADJ. Verify pinout compatibility if substituting with non-NOPB variants or cross-manufacturer equivalents.
