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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 3A TO263-3
- 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-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Supplier Device Package：TO-263-3
- Grade：-
- Qualification：-
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Overview
The LM1085R-ADJ is a positive adjustable low dropout voltage regulator manufactured by TAEJIN (HTC Korea). It provides an output current of 3.0A with a maximum dropout voltage of 1.5V at full load. The device features a reference voltage of 1.25V and utilizes a TO-263-3L surface mount package. Electrical characteristics include line regulation of 0.04% typical and load regulation of 0.2% typical. Internal protection circuits provide thermal limiting and current limiting to safeguard against overload conditions.
Feature Summary
- Provides 3.0A output current capability with fast transient response
- Features internal thermal and current limiting for overload protection
- Low dropout voltage of 1.5V at maximum output current
- Adjustable output voltage using external resistor divider
Applications
- Battery Charger
- Adjustable Power Supplies
- Constant Current Regulators
- Portable Instrumentation
- High Efficiency Linear Power Supplies
Procurement Notes
Verify the manufacturer designation as TAEJIN or HTC Korea based on specific ordering requirements. Confirm the package type is TO-263-3L and that the suffix ADJ indicates the adjustable version. Ensure compliance with Moisture Sensitivity Level 3 handling procedures during storage and assembly.
Selection Notes
Select this component for applications requiring high current linear regulation with low dropout characteristics. The adjustable configuration allows flexibility in setting output voltages via external resistors. Consider thermal management requirements due to the 3.0A current capacity and ensure adequate heat sinking for continuous operation.
Part Context
This part belongs to the LM1085 series of three-terminal positive voltage regulators. The series includes fixed voltage options alongside the adjustable variant. It is designed as a pin-compatible alternative to traditional regulators, offering improved reference tolerance and stability with temperature variations compared to older standards.
Replacement Considerations
LM1085RS-ADJ (TO-252-3L package)
FAQ
What is the minimum load current required for the adjustable version?
The minimum load current for the adjustable version is specified between 3mA and 7mA.
Is a protection diode needed between the input and output?
Protection diodes are generally not needed under normal operation, but are recommended if high value output capacitors are used and the input pin might be instantaneously shorted to ground.
