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Product Detailed Parameters
- Description：IC REG LINEAR 15V 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)：15V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：2V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：-
- PSRR：70dB (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-15/NOPB is a three-terminal positive linear voltage regulator from Texas Instruments, housed in a TO-3-2 through-hole package. It provides a fixed output voltage of 15 V with a maximum output current of 1 A. The device operates within an input voltage range of 17.7 V to 35 V and supports an extended operating temperature range from -55 °C to +125 °C. Key electrical specifications include a line regulation of 22 mV, load regulation of 35 mV, and a typical quiescent current of 6 mA.
Feature Summary
- Industrial-grade thermal performance designed for high-power applications
- Internal current limiting and thermal shutdown protection mechanisms
- Robust construction suitable for harsh environmental conditions
Applications
- High-power industrial power supplies
- Military and aerospace electronic systems
- Automotive electronics requiring wide temperature tolerance
Procurement Notes
Verify the component authenticity by checking the manufacturer's part number against official datasheets. Confirm the presence of the NOPB suffix indicates lead-free compliance. Ensure the TO-3-2 package matches the intended PCB footprint. Validate that the fixed 15 V output aligns with system requirements before procurement.
Selection Notes
Select this regulator when a fixed 15 V output at 1 A is required in extreme environments. The TO-3-2 package facilitates direct mounting to heat sinks for effective thermal management. Consider the minimum dropout voltage relative to the input supply. This component is suitable where reliability under high stress is critical compared to standard commercial alternatives.
Part Context
This component belongs to the LM140 series of three-terminal positive regulators. It shares functional similarities with other variants like the LM140K-12 but differs in output voltage. The K suffix denotes the military/industrial grade version with extended temperature capabilities. It serves as a robust alternative to lower-grade commercial regulators in demanding applications.
Replacement Considerations
Direct substitutes include LM140K-15 without the NOPB suffix for non-lead-free requirements. Other LM140K variants offer different fixed voltages such as 12 V or 5 V. For higher current needs, consider the LM340 series. Verify pinout compatibility and thermal resistance characteristics when substituting.
