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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 3A TO252-3
- Series：-
- Mfr：TAEJIN
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：15V
- Voltage Dropout (Max)：1.5V @ 3A
- Current - Output：3A
- Current - Quiescent (Iq)：90 µA
- Current - Supply (Max)：10 mA
- PSRR：65dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：TO-252-3
- Grade：-
- Qualification：-
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Overview
The LM1085RS-ADJ is a positive adjustable low dropout voltage regulator manufactured by TAEJIN (HTC Korea). It provides an output current capability of 3.0A with a maximum dropout voltage of 1.5V at full load. The device features a TO-252-3L surface mount package and includes internal thermal limiting and current limiting protection circuits. It operates within a junction temperature range of -40°C to 125°C, with a supply voltage limit of 15V.
Feature Summary
- Adjustable output voltage configuration using external resistor dividers
- Internal thermal shutdown and current limiting for overload protection
- Low dropout voltage performance suitable for microprocessor applications
- Fast transient response characteristics
Applications
- Battery chargers
- Adjustable power supplies
- Constant current regulators
- Portable instrumentation
- SMPS post-regulators
Procurement Notes
Verify the manufacturer designation as HTC Korea or TAEJIN based on specific ordering documentation. Confirm the package type corresponds to the RS suffix indicating TO-252-3L. Ensure compatibility with moisture sensitivity level 3 requirements during storage and handling procedures.
Selection Notes
Select this component when a 3.0A linear regulation solution is required in a compact surface mount form factor. The adjustable version allows flexibility in setting output voltages via external resistors. Consider thermal management strategies due to the high current capability and potential power dissipation under heavy loads.
Part Context
This part belongs to the LM1085 series of three-terminal positive voltage regulators. The series includes both fixed and adjustable versions available in TO-263 and TO-252 packages. It serves as a high-efficiency alternative to traditional linear regulators, offering lower dropout voltages and improved reference stability across temperature ranges.
Replacement Considerations
LM1085R-ADJ (TO-263-3L package variant)
FAQ
What is the maximum input voltage allowed for the LM1085RS-ADJ?
The absolute maximum rating for the supply voltage (VIN) is 15V.
Does the LM1085RS-ADJ require protection diodes between pins?
Under normal operation, no protection diodes are needed between the adjustment pin and output or from output to input due to internal current limiting resistors.
How is stability ensured in the LM1085 circuit design?
Stability requires an output capacitor, such as 150µF aluminum electrolytic or 22µF solid tantalum, as part of the device frequency compensation.
