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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 fixed-output linear voltage regulator from the LM140L series, manufactured by Texas Instruments. It provides a stable positive 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 features a typical line regulation of 0.04 %/V and load regulation of 0.01 %/mA. It exhibits a typical power supply rejection ratio (PSRR) of 52 dB at 100 kHz and a quiescent current of 4.5 mA. Designed for through-hole mounting in a TO-39-3 package, it supports an extended operating temperature range from -55 °C to +125 °C.
Feature Summary
- Fixed 12 V positive output voltage with 100 mA current capability
- Extended industrial temperature range from -55 °C to +125 °C
- Through-hole TO-39-3 metal can package for robust mounting
Applications
- Military and aerospace electronic systems requiring reliable voltage regulation
- Industrial control equipment operating in harsh environments
- Test and measurement instrumentation needing stable low-current DC supplies
Procurement Notes
Verify that the specific part number includes the /NOPB suffix to ensure compliance with RoHS directives and lead-free manufacturing standards as specified by Texas Instruments. Confirm the package type matches the required TO-39-3 form factor for your PCB or chassis layout. Ensure that the application circuitry accounts for the thermal resistance characteristics inherent to the metal can package under maximum load conditions.
Selection Notes
Select this component when a fixed 12 V output is required with moderate current demands up to 100 mA. It is suitable for applications where wide input voltage variations between 17.6 V and 35 V are expected. Consider the TO-39-3 package constraints regarding board space and mounting hardware. Compare against other LM140L variants if different output voltages or military-grade certifications like QML are necessary.
Part Context
This regulator belongs to the LM140L series, which comprises three-terminal positive regulators designed for general-purpose and specialized applications. The LM140LAH-12 variant specifically targets the 12 V output segment of this family. It shares architectural similarities with other members like the LM140LAH-15 but differs in internal reference settings. The series is known for its reliability in demanding environments compared to standard commercial counterparts.
Replacement Considerations
- LM140LAH-15/NOPB
- LM140K-12/NOPB
FAQ
What is the minimum input voltage required for proper regulation?
The minimum input voltage is 17.6 V to maintain regulation at the 12 V output.
Does this component support ceramic output capacitors?
No, the datasheet specifies non-ceramic output capacitors for stability.
