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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 5A TO263
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：27V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.5V @ 5A
- Current - Output：5A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：72dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- 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 LM1084IS-3.3/NOPB is a fixed-output positive low-dropout linear regulator manufactured by Texas Instruments. It provides a stable 3.3 V output with a maximum continuous current of 5 A. The device operates within an input voltage range up to 29 V and features a typical dropout voltage of 1.3 V at full load, with a maximum of 1.5 V. It includes integrated thermal shutdown and current limiting protection. The component is housed in a surface-mount D2PAK-3 (TO-263-3) package and supports an industrial operating temperature range from -40 °C to +125 °C.
Feature Summary
- Provides a fixed 3.3 V regulated output suitable for standard logic levels
- Delivers high continuous output current capability up to 5 A
- Integrates internal thermal shutdown and adjustable current limiting for robust operation
Applications
- Post-regulation stage for switching DC/DC converters
- Battery-powered systems requiring efficient linear regulation
- General-purpose power supplies for embedded electronics
Procurement Notes
Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per the manufacturer's latest documentation. Confirm the 'IS' designation indicates the industrial temperature grade (-40°C to +125°C). Ensure the D2PAK-3 package matches the target PCB footprint. Cross-reference the datasheet revision to confirm pinout compatibility with legacy LM317 designs if applicable.
Selection Notes
Select this component when a fixed 3.3 V rail is required with high current capacity. It serves as a direct replacement for the LM317 in terms of pinout but offers higher current handling. Consider the thermal dissipation requirements given the 5 A capability and the TO-263 package size. Verify that the input-to-output voltage differential remains within limits to prevent excessive power dissipation under maximum load conditions.
Part Context
This part belongs to the LM1084 family of 5 A low-dropout positive regulators. It shares the industry-standard pinout of the LM317 but is optimized for higher current performance. The series includes adjustable versions and other fixed voltages like 5.0 V. The NOPB suffix denotes a non-pb-free variant transitioned to lead-free manufacturing, aligning with modern environmental standards while maintaining electrical equivalence.
Replacement Considerations
LM1084IS-5.0/NOPB: Alternative fixed output voltage.
FAQ
Is the LM1084IS-3.3/NOPB pin-compatible with the LM317?
Yes, the LM1084 series maintains the same pin configuration as the industry-standard LM317, allowing for potential drop-in replacements in existing layouts.
What is the maximum input voltage for this regulator?
The maximum input voltage rating is 29 V.
