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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 3A TO220-3
- 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：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220-3
- Grade：-
- Qualification：-
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Overview
The LM1085IT-ADJ/NOPB is a low dropout positive voltage regulator from Texas Instruments, designed for high-current applications. It delivers an adjustable output voltage ranging from 1.25V to 27V with a maximum load current of 3A. The device features a maximum dropout voltage of 1.5V at full load and operates within an input voltage range of 2.6V to 29V. It includes internal thermal overload and current limit protection. The component is housed in a surface-mount TO-263 (D2PAK) package and supports an operating junction temperature range from -40°C to +125°C.
Feature Summary
- Adjustable output voltage configuration via external resistor network
- Integrated thermal shutdown and current limiting protection circuits
- Low dropout performance enabling efficient regulation under varying load conditions
Applications
- Point-of-load regulation in distributed power systems
- Pre-regulator stages for switching converters
- Battery-powered equipment requiring stable voltage supply
Procurement Notes
Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer documentation. Confirm the 'IT' suffix indicates the correct industrial temperature rating (-40°C to +125°C). Ensure the D2PAK package footprint matches the target PCB design. Cross-reference the datasheet revision date to ensure all electrical characteristics align with current manufacturing standards.
Selection Notes
Select this component when an adjustable output voltage is required alongside high current capability up to 3A. It is suitable for designs needing low dropout voltage to maximize efficiency near the input rail. Consider the thermal resistance of the TO-263 package and implement adequate copper area or heatsinking to manage power dissipation within the specified junction temperature limits.
Part Context
This part belongs to the LM1085 family of low dropout linear regulators manufactured by Texas Instruments. The series offers both fixed and adjustable output options in various packages including TO-220 and TO-263. The LM1085IT-ADJ/NOPB specifically denotes the adjustable version in the industrial temperature grade surface-mount package.
Replacement Considerations
LM1085IS-ADJ/NOPB: Identical functional specifications but in a tube package instead of tape and reel.
FAQ
What is the minimum input voltage required for the LM1085IT-ADJ/NOPB?
The minimum input voltage is 2.6V, provided the desired output voltage plus the dropout voltage is maintained.
Does the LM1085IT-ADJ/NOPB include short-circuit protection?
Yes, the device incorporates internal current limiting and thermal overload protection to safeguard against short circuits and excessive temperatures.
