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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 3A TO252-3
- Series：-
- Mfr：TAEJIN
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.5V @ 3A
- Current - Output：3A
- Current - Quiescent (Iq)：-
- 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-3.3 is a fixed-output low dropout positive voltage regulator manufactured by TAEJIN (HTC). It provides a 3.3V output with a maximum current capability of 3.0A. The device features a TO-252-3L surface mount package and guarantees a maximum dropout voltage of 1.5V at full load. It incorporates internal thermal limiting and current limiting for protection against overload conditions.
Feature Summary
- Provides a fixed 3.3V output voltage with 3.0A current capability
- Low dropout performance ensuring efficiency in low voltage applications
- Integrated thermal and current limiting for robust operation under overload
- Designed for fast transient response to support microprocessor power requirements
Applications
- Battery Charger systems
- Adjustable Power Supplies
- Portable Instrumentation
- High Efficiency Linear Power Supplies
- Powering VGA & Sound Card circuits
Procurement Notes
Verify the manufacturer designation as HTC Korea or TAEJIN, as datasheets may carry either branding. Confirm the specific package variant corresponds to the TO-252-3L footprint required for your PCB layout. Ensure compliance with Moisture Sensitivity Level 3 handling protocols during assembly to prevent package damage.
Selection Notes
Select this component when a fixed 3.3V rail is required with high current delivery up to 3.0A. The TO-252-3L package offers a balance of thermal dissipation and surface mount convenience. Consider the 1.5V dropout specification to ensure sufficient input-to-output voltage differential is maintained across all operating loads.
Part Context
This part belongs to the LM1085 series of three-terminal positive voltage regulators. The series includes both adjustable and fixed voltage versions available in TO-263-3L and TO-252-3L packages. The RS suffix specifically denotes the smaller TO-252-3L surface mount form factor used in space-constrained designs.
Replacement Considerations
LM1085R-3.3 (TO-263-3L package)
FAQ
What is the maximum dropout voltage specified for this regulator?
The maximum dropout voltage is guaranteed at 1.5V when delivering the full 3.0A output current.
Does the LM1085RS-3.3 require external protection diodes?
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.
