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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 5A 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)：27.5V
- Voltage Dropout (Max)：1.5V @ 5A
- Current - Output：5A
- 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
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220-3
- Grade：-
- Qualification：-
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Overview
The LM1084IT-ADJ/NOPB is a low-dropout positive voltage regulator from Texas Instruments, designed for high-efficiency linear regulation. It operates with an input-to-output differential voltage as low as 1.3V at full load current. The device provides adjustable output voltages ranging from 1.25V to 32V using two external resistors. It features internal current limiting and thermal shutdown protection to ensure robust operation under fault conditions. The IT suffix indicates an industrial temperature range of -40°C to +125°C, housed in a surface-mount TO-263 package.
Feature Summary
- Integrated thermal overload and short-circuit current limit protection
- Adjustable output voltage capability via external resistor network
- Low dropout voltage performance for efficient power conversion
- High ripple rejection ratio for clean output stability
Applications
- Battery-powered systems requiring efficient linear regulation
- Post-regulation stages for switching power supplies
- Embedded control circuits in industrial environments
- General-purpose point-of-load regulation modules
Procurement Notes
Verify the NOPB suffix confirms lead-free compliance and RoHS adherence per manufacturer specifications. Confirm the IT suffix matches the required industrial temperature range for your specific application environment. Ensure the TO-263 package footprint aligns with your PCB design constraints before finalizing procurement orders.
Selection Notes
Select this component when input voltage remains close to the desired output level to minimize heat dissipation. The adjustable version offers flexibility for custom voltage rails compared to fixed variants. Consider the thermal resistance of the TO-263 package and implement adequate heatsinking if operating near maximum current limits in enclosed spaces.
Part Context
This part belongs to the LM1084 family of adjustable regulators, serving as a successor to older series with improved dropout characteristics. It competes in the market for medium-current linear regulators where noise sensitivity is lower than in RF applications but efficiency gains over traditional LDOs are critical for battery life extension.
Replacement Considerations
Direct pin-compatible substitutes include the LM1084IS-ADJ/NOPB for commercial temperature ranges or other LM1084 variants with matching electrical specifications. Verify that any replacement maintains the same current rating and dropout voltage profile to ensure circuit stability without redesign.
