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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - LinearLM341T-15
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LM341T-15 - Texas Instruments

Manufacturer Part Number
LM341T-15
Manufacturer
Texas Instruments
Allelco Part Number
32D-LM341T-15
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
65,260 pcs available, New & Original
Parts Description
IC REG LIN FIXED POS STD REG 12V
Package
TO-220-3
Data sheet
-
RoHs Status
 
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In stock: 65260

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Specifications

LM341T-15 Tech Specifications
Texas Instruments - LM341T-15 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - LM341T-15

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage Dropout (Max) -
Voltage - Output (Min/Fixed) 15V
Voltage - Output (Max) -
Voltage - Input (Max) 35V
Supplier Device Package TO-220-3
Series -
Protection Features Over Current, Over Temperature, Short Circuit
Package / Case TO-220-3
Package Bulk
Product Attribute Attribute Value
PSRR 69dB (120Hz)
Output Type Fixed
Output Configuration Positive
Operating Temperature -40°C ~ 125°C
Number of Regulators 1
Mounting Type Through Hole
Current - Quiescent (Iq) 4 mA
Current - Output 500mA
Control Features -
Base Product Number LM341

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Affected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

LM341T-15 Image
LM341T-15 (1)

Manufacturer Part Number

LM341T-15

Manufacturer

texas-instruments

Introduction

The LM341T-15 is a 15V, 500mA, positive voltage regulator from Texas Instruments. It is a member of the LM341 series of linear regulators, which are known for their reliability, stability, and ease of use. The LM341T-15 is designed to provide a well-regulated and noise-free output voltage from an unregulated input.

Product Features and Performance

Fixed output voltage of 15V

Output current capability of 500mA

Low quiescent current of 4mA

High Power Supply Rejection Ratio (PSRR) of 69dB at 120Hz

Thermal overload and short-circuit protection

Product Advantages

Robust and reliable performance

Compact and easy-to-use TO-220 package

Wide operating temperature range of -40°C to 125°C

Suitable for a variety of applications

Key Reasons to Choose This Product

Proven reliability and stability from a trusted manufacturer

Excellent voltage regulation and noise rejection performance

Comprehensive protection features for safe and reliable operation

Flexible operating temperature range for diverse applications

Quality and Safety Features

Thermal overload protection

Short-circuit protection

Robust TO-220 package for reliability

Compatibility

The LM341T-15 is compatible with a wide range of electronic systems and devices that require a stable and regulated 15V power supply.

Application Areas

Industrial equipment

Telecommunications systems

Instrumentation and control applications

Automotive electronics

Product Lifecycle

The LM341T-15 is now listed as an obsolete product, meaning it is no longer in active production. However, there may still be limited stock available, or there may be equivalent or alternative models that can be used as a replacement. Customers are advised to contact our website's sales team for more information on available options and support.

Frequently Asked Questions(FAQ)

What is the maximum input voltage the LM341T-15 can safely handle in a 12V automotive application, and how does this impact transient protection design?
The LM341T-15 supports a maximum input voltage of 35V, which exceeds typical automotive supply rails. In a 12V system with potential load dump transients up to 40V or higher, this margin allows the regulator to remain operational during fault conditions without requiring an additional transient suppressor, simplifying board layout and reliability.
How does the dropout voltage of the LM341T-15 compare to modern switching regulators when powered from a 16V source, and what efficiency implications arise?
Although the dropout voltage isn't explicitly listed for the LM341T-15, typical fixed 15V versions exhibit around 1.5V to 2V dropout at 500mA. When operating from a 16V rail, this results in a minimum input of 17V for proper regulation. Compared to a buck converter achieving >85% efficiency at this current, the linear regulator dissipates (17V - 15V) × 0.5A = 1W as heat, necessitating thermal management despite its simplicity.
Can the LM341T-15 be used in parallel to increase output current capacity, and what risks must be mitigated to avoid imbalance?
While paralleling the LM341T-15 can increase total current delivery, inherent variations in Vf and Iq between units lead to unequal current sharing. Without external ballasting resistors or control circuitry, one device may carry significantly more current, risking thermal runaway. This configuration is generally discouraged unless strict current balancing is implemented.
What are the key differences between the TO-220-3 and SOT-223 packages for the LM341T-15, especially regarding thermal performance and board space?
The TO-220-3 package offers superior thermal resistance (junction-to-case ~5°C/W) compared to SOT-223 (~65°C/W), enabling better heat dissipation for the same power load. However, TO-220 consumes more PCB real estate and may require standoffs or mounting hardware. For high-current or ambient-heated applications, the TO-220 is preferable despite size constraints.
How does the quiescent current of 4 mA affect battery-powered systems using the LM341T-15, and what alternatives exist for ultra-low-power designs?
At 4 mA IQ, the LM341T-15 draws significant current even when unloaded—equivalent to a 3.7V Li-ion cell lasting less than 10 hours under light load. For extended battery life, switching regulators like the TPS62130 or LDOs such as the LP2985 are far more efficient, reducing idle current to microamps rather than milliamps.
Is the LM341T-15 suitable for industrial motor control circuits operating near 24V nominal supplies, and what derating practices apply?
Yes, but only if input transients remain below 35V. A 24V industrial supply often experiences surges up to 36V due to inductive kickback or grid fluctuations. With no internal clamping above 35V, an external TVS diode should be added at the input. Additionally, continuous operation near 28V input may require heatsinking due to increased power dissipation.
Why might designers still choose the LM341T-15 over newer LDOs despite its RoHS non-compliance, and where is this part still viable?
The LM341T-15 remains useful in legacy systems, retrofits, or environments where regulatory updates haven’t been adopted yet. Its proven reliability, robust protection features (OCP, OTP, short-circuit), and availability in bulk packaging make it acceptable for non-consumer applications where cost and provenance outweigh compliance requirements.
How does the PSRR of 69dB at 120Hz influence noise-sensitive analog subsystems powered by the LM341T-15?
A PSRR of 69dB attenuates ripple by approximately 2000:1 at 120Hz, meaning a 100mV ripple on a 24V input becomes ~50µV at the output. This makes the LM341T-15 adequate for moderate-noise environments but insufficient for precision analog circuits requiring <10µV RMS ripple—those would need higher-performance LDOs with >75dB PSRR across wider bandwidths.
What layout precautions are critical when implementing the LM341T-15 in a 500mA power path, particularly regarding thermal vias and copper area?
Adequate copper pour beneath the tab and multiple thermal vias connecting to inner ground planes are essential to dissipate heat efficiently. For sustained loads near 500mA from inputs above 17V, total junction temperature rise must stay within limits; otherwise, derating to 400mA or adding a heatsink becomes necessary. Poor layout can negate the package’s thermal advantages.
How does the operating temperature range of -40°C to 125°C affect reliability in aerospace versus consumer electronics applications?
The full military-grade temperature range enables use in harsh environments like downhole drilling or avionics, where components face extreme thermal cycling. Consumer designs typically operate within 0°C to 70°C, so this specification provides ample headroom. However, long-term exposure near 125°C accelerates degradation unless proper derating is applied based on actual power dissipation.
Can the LM341T-15 regulate effectively when driven by a noisy DC-DC pre-regulator with high-frequency switching ripple?
Yes, but only if the ripple frequency exceeds the PSRR roll-off point of the LM341T-15, which begins degrading above 1kHz. Since most DC-DC converters switch at hundreds of kHz, the LDO’s PSRR drops significantly, allowing more ripple through. Adding a small LC filter before the LM341T-15 improves stability and reduces audible noise in sensitive analog stages.
What are the consequences of exceeding the 500mA output current limit in the LM341T-15, and how does built-in protection mitigate damage?
Exceeding 500mA causes excessive power dissipation, potentially raising junction temperature beyond 150°C. The LM341T-15 includes overtemperature shutdown that disables the pass transistor until cooling occurs. Combined with overcurrent limiting that caps fault current around 600–700mA, these protections prevent catastrophic failure even during prolonged overloads—though they do not restore normal regulation during faults.
How does the absence of adjustable output affect system flexibility when using the LM341T-15 alongside other fixed-voltage regulators?
Fixed 15V output restricts reuse across multiple rails unless multiple LM341T-15 units are deployed. This increases bill-of-materials complexity compared to adjustable regulators like the LM317. In multi-rail designs, mismatched outputs also complicate sequencing and monitoring, making centralized power architecture planning more challenging.
What is the significance of MSL 1 in the context of long-term storage for the LM341T-15, and how should inventory be managed?
MSL 1 indicates the LM341T-15 is moisture-insensitive and can be stored indefinitely without baking prior to reflow, simplifying procurement and shelf-life management. Distributors and engineers benefit from relaxed handling protocols, though standard anti-static precautions still apply due to ESD sensitivity common among semiconductor devices.
How does the ECCN classification of EAR99 influence global sourcing decisions involving the LM341T-15, particularly for international manufacturing?
EAR99 means the LM341T-15 is not subject to U.S. export controls unless destined for embargoed countries, easing cross-border supply chains. However, exporters must still verify end-use compliance, especially in defense or satellite applications where stricter screening applies regardless of component classification.
What role does the base product number LM341 play in legacy system support, and are replacement parts readily available?
The LM341 family spans decades of production, ensuring long-term availability through authorized distributors even after National Semiconductor was acquired by Texas Instruments. Engineers often rely on this continuity for industrial equipment spanning 10+ years, though new designs should prefer TI’s updated equivalents with improved specs and RoHS compliance.
How does the short-circuit protection mechanism function in the LM341T-15, and what recovery behavior should be expected?
Upon detecting a short circuit, the LM341T-15 enters current-limited mode, capping output current to safe levels. Once the short is removed, the regulator automatically resumes normal operation without manual reset—a feature critical for mission systems where serviceability during testing is limited.
Why might an engineer select the LM341T-15 over a switching regulator despite lower efficiency, and in what design contexts is this justified?
The LM341T-15 offers simplicity, low output noise, predictable transient response, and immunity to instability issues common in buck converters. It’s ideal for noise-sensitive analog front-ends, legacy interfaces, or where electromagnetic interference regulations favor linear solutions—especially when input-output differential voltage is small enough to justify thermal trade-offs.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments LM341T-15

Product Attribute LM341T-15 LM341T-15/NOPB LM341T-5.0 LM341T-12
Part Number LM341T-15 LM341T-15/NOPB LM341T-5.0 LM341T-12
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Package / Case TO-220-3 TO-220-3 TO-220-3 TO-220-3
Supplier Device Package TO-220-3 TO-220-3 TO-220-3 TO-220-3
Voltage - Input (Max) 35V 35V 35V 35V
PSRR 69dB (120Hz) 69dB (120Hz) 78dB (120Hz) 71dB (120Hz)
Voltage Dropout (Max) - - - -
Current - Output 500mA 500mA 500mA 500mA
Package Bulk Bulk Tube Tube
Number of Regulators 1 1 1 1
Base Product Number LM341 LM341 LM341 LM341
Control Features - - - -
Output Configuration Positive Positive Positive Positive
Mounting Type Through Hole Through Hole Through Hole Through Hole
Voltage - Output (Min/Fixed) 15V 15V 5V 12V
Protection Features Over Current, Over Temperature, Short Circuit Over Current, Over Temperature, Short Circuit Over Current, Over Temperature, Short Circuit Over Current, Over Temperature, Short Circuit
Series - - - -
Output Type Fixed Fixed Fixed Fixed
Operating Temperature -40°C ~ 125°C -40°C ~ 125°C -40°C ~ 125°C -40°C ~ 125°C
Voltage - Output (Max) - - - -
Current - Quiescent (Iq) 4 mA 4 mA 4 mA 4 mA

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
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Italy 5
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New Zealand 5
Asia India 4
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Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
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LM341T-15 Image

LM341T-15

Texas Instruments
32D-LM341T-15

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