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Product Detailed Parameters
- Description：IC REG LINEAR 5V 1A TO3-2
- Series：-
- Mfr：Texas Instruments
- Package：Tray
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：35V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：2V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：-
- PSRR：80dB (120Hz)
- Control Features：-
- Protection Features：Over Temperature, Short Circuit
- Operating Temperature：-55°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-204AA, TO-3
- Supplier Device Package：TO-3-2
- Grade：-
- Qualification：-
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Overview
The LM140K-5.0 is a positive linear voltage regulator from the LM140 series, manufactured by Texas Instruments. It provides a fixed 5 V output with a maximum load current of 1 A. The device operates within an input voltage range of 7.5 V to 35 V and supports through-hole mounting in a TO-3-2 package. It functions as an industrial-strength regulator designed for applications requiring robust performance across a temperature range of 0°C to +125°C.
Feature Summary
- Industrial-strength design intended to prevent thermal and EMI damage
- Fixed positive output voltage regulation
- Through-hole installation capability
Applications
- General-purpose power supply regulation
- Local voltage regulation for logic circuits
- Power management in industrial equipment
Procurement Notes
Verify the specific suffix against official datasheets to confirm pinout and electrical characteristics match the required application. Ensure the ordering part number corresponds to the exact tolerance and package variant needed. Cross-reference manufacturer documentation to validate RoHS compliance status and lead time requirements before finalizing procurement decisions.
Selection Notes
Select this component when a fixed 5 V output at up to 1 A is required in a high-power through-hole package. Consider the TO-3-2 form factor for superior heat dissipation compared to smaller surface-mount alternatives. Evaluate the input voltage headroom requirements relative to the minimum dropout specifications provided in the technical data.
Part Context
This device belongs to the LM140 family of three-terminal positive regulators. It shares functional similarities with the LM340 series but is distinguished by its specific industrial-grade rating and packaging options. The LM140K-5.0 serves as a legacy or specialized option within Texas Instruments' broader portfolio of linear voltage regulators.
Replacement Considerations
The LM340K-5.0/NOPB is a documented substitute within the same product family offering identical fixed 5 V output and 1.5 A current capability in a TO-3 package.
