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Product Detailed Parameters
- Description：IC REG LINEAR 12V 100MA TO3
- Series：-
- Mfr：Texas Instruments
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：35V
- Voltage - Output (Min/Fixed)：12V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：2V @ 1A
- Current - Output：100mA
- Current - Quiescent (Iq)：3 mA
- Current - Supply (Max)：4.5 mA
- PSRR：72dB (120Hz)
- Control Features：-
- Protection Features：Over Temperature, Short Circuit
- Operating Temperature：-55°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-205AD, TO-39-3 Metal Can
- Supplier Device Package：TO-3
- Grade：-
- Qualification：-
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Overview
The LM140LAH-12/NOPB is a three-terminal positive linear voltage regulator from the LM140L series, manufactured by Texas Instruments. It provides a fixed output voltage of 12 V with a maximum output current of 100 mA. The device operates within an input voltage range of 17.6 V to 35 V and supports a junction temperature range from -55 °C to +125 °C. It features a quiescent current of 4.5 mA and utilizes a TO-39-3 through-hole package.
Feature Summary
- Provides a stable fixed positive output voltage suitable for precision regulation applications
- Capable of delivering up to 100 mA of continuous load current
- Designed for operation in extended industrial temperature environments
Applications
- Precision power supply circuits requiring regulated DC voltage
- Industrial control systems operating in harsh thermal conditions
- Test and measurement equipment power stages
Procurement Notes
Verify the component authenticity against the manufacturer's official datasheet specifications before integration. Confirm that the TO-39-3 package dimensions match the target PCB footprint requirements. Ensure the selected supplier provides traceability documentation consistent with Texas Instruments quality standards for military-grade or extended temperature variants.
Selection Notes
Select this component when a fixed 12 V output at 100 mA is required in a through-hole configuration. Consider the LM140K series if higher current capacity near 1 A is necessary, noting the difference in package type and thermal performance. Evaluate the input-to-output differential voltage to ensure adequate headroom for proper regulation under all expected load conditions.
Part Context
This part belongs to the LM140L family of three-terminal positive regulators, distinguished by its extended temperature rating and specific current capabilities compared to standard commercial variants. The suffix NOPB indicates lead-free construction compliant with RoHS directives. It serves as a robust solution for applications demanding reliability over a wide thermal range without the complexity of adjustable regulator configurations.
Replacement Considerations
LM140LAH-12 (Non-NOPB variant)
FAQ
What is the minimum input voltage required for proper regulation?
The minimum input voltage is 17.6 V to maintain regulation at the specified output.
Does this regulator support adjustable output voltages?
No, the LM140LAH-12/NOPB is designed exclusively for a fixed 12 V output.
