The LM338K navigates a wide voltage spectrum from 1.2 V to 32 V, capably managing currents surpassing 5 A. Its adaptability is unveiled through the simple use of two resistors for output adjustment, which eases its incorporation into a variety of systems.
Industrial systems benefit from its design, blending efficiency akin to advanced power supplies. Telecommunications systems find it suitable due to its versatility. Domestic electronics appreciate its seamless integration.
In power management fields you can frequently incorporate the LM338K into their systems. Its stability and ease of utilization make it a preferred choice for those seeking reliable power solutions. Its sturdy design confronts fluctuating loads with grace, making it exceptionally useful.
Type |
Parameter |
Mount |
Through Hole |
Mounting Type |
Through Hole |
Package / Case |
TO-204AA, TO-3 |
Number of Pins |
2 |
Weight |
6.40101g |
Operating Temperature |
0°C ~ 125°C |
Packaging |
Tube |
Tolerance |
5% |
JESD-609 Code |
e3 |
Part Status |
Obsolete |
Moisture Sensitivity Level (MSL) |
1 (Unlimited) |
Number of Terminations |
2 |
ECCN Code |
EAR99 |
Terminal Finish |
Tin (Sn) |
Power Rating |
50W |
Terminal Position |
BOTTOM |
Terminal Form |
PIN/PEG |
Number of Functions |
1 |
Base Part Number |
LM338 |
Pin Count |
2 |
Number of Outputs |
1 |
Voltage - Input (Max) |
35V |
Output Voltage |
32V |
Output Type |
Adjustable |
Max Output Current |
5A |
Output Configuration |
Positive |
Max Output Voltage |
32V |
Number of Regulators |
1 |
Min Input Voltage |
4.2V |
Protection Features |
Over Current, Over Temperature |
PSRR |
75dB ~ 60dB (120Hz) |
Reference Voltage |
1.29V |
Dropout Voltage |
3V |
Dropout Voltage1-Nom |
3V |
Min Output Voltage |
1.2V |
Power Supply Rejection Ratio (PSRR) |
75dB |
Min Current Limit |
7A |
Load Regulation-Max (%) |
1% |
Height |
8.7mm |
Length |
39.5mm |
Width |
26.2mm |
REACH SVHC |
No SVHC |
Radiation Hardening |
No |
RoHS Status |
ROHS3 Compliant |
Lead Free |
Lead Free |
Feature |
Description |
Peak Output Current |
Guaranteed 7 A |
Output Current |
Guaranteed 5 A |
Adjustable Output Voltage |
Down to 1.2 V |
Line Regulation |
Typically 0.005 %/V |
Load Regulation |
Typically 0.1 % |
Thermal Regulation |
Guaranteed |
Current Limit |
Constant with temperature |
Package Type |
Standard 3-lead transistor package |
The LM338K serves in crafting adjustable power supplies, delivering precise constant current, and efficiently charging batteries. Its wide application stems from its sturdy build and versatile voltage regulation.
The LM338K is chief in creating versatile power supply systems. Its ability to manage high voltage and current enhances stability while minimizing noise, boosting electronic system performance. Commonly used in labs and workshops, these systems benefit from the reliability of equipment. You can value the precise voltage adjustments, reflecting the device’s precision and reliability.
In contexts such as LED lighting and motor control, regulating constant current is active. The LM338K provides stable current, safeguarding sensitive components and improving system efficiency. Reliable current regulation helps ensure long-term stability, preventing fluctuations that might lead to system failures.
Battery charging systems leverage the LM338K's adjustable capabilities for precise charging cycle control. This optimizes battery charging efficiency and safety, enhancing battery lifespan. Advanced systems integrate features to detect state changes in charging, significantly improving efficiency and battery health.
The LM338K's durable design and voltage regulation adaptability make it suitable for various applications. It functions well under different environmental conditions, a valued trait in industries demanding robustness. Its flexibility has led to widespread use in fields that require high performance and dependability, you can often cite these features as reasons for selection in diverse projects.
Parts |
Description |
Manufacturer |
LM138AKSTEEL |
1.2 V-32V Adjustable Positive Regulator, MBFM2, Metal
Can, TO-3, 2 Pin |
Texas Instruments |
LM138K/883 |
IC VREG 1.2 V-32 V Adjustable Positive Regulator, MBFM2,
Metal Can, TO-3, 2 Pin, Adjustable Positive Single Output Standard Regulator |
National Semiconductor Corporation |
LM338K STEEL/NOPB |
1.2 V-32V Adjustable Positive Regulator, MBFM2, Green,
Metal Can, TO-3, 2 Pin |
Texas Instruments |
LM138K-MIL/NOPB |
1.2 V-32V Adjustable Positive Regulator, MBFM2, RoHS
Compliant, Metal Can, TO-3, 3 Pin |
Texas Instruments |
M38510/11706SYA |
IC VREG Adjustable Positive Regulator, Adjustable
Positive Single Output Standard Regulator |
Linear Technology |
FT138AK |
Adjustable Positive Standard Regulator, 1.2V Min, 32V
Max, MBFM2, Metal Can, TO-3, 2 Pin |
Force Technologies Ltd |
FT338K |
Adjustable Positive Standard Regulator, 1.2V Min, 32V
Max, MBFM2, Metal Can, TO-3, 2 Pin |
Force Technologies Ltd |
LT338AK |
IC VREG 1.2 V-32 V Adjustable Positive Regulator, MBFM2,
Metal Can, TO-3, 3 Pin, Adjustable Positive Single Output Standard Regulator |
Linear Technology |
SG138AK/883B |
Regulator, 1 Output, Bipolar |
Microsemi Corporation |
LM338MWC |
1.2 V-32V Adjustable Positive Regulator, UUC, Wafer |
Texas Instruments |
STMicroelectronics intertwines its core design philosophy with sustainability in semiconductor solutions, weaving environmental stewardship with product safety and efficiency, reflecting on values and aspirations towards a sustainable future.
Dominant to STMicroelectronics' innovations is the pursuit of eco-conscious technology to minimize environmental harm. By emphasizing energy efficiency, components are crafted to lower power consumption across diverse applications. Industries like automotive and consumer electronics benefit, from seeing a reduction in carbon footprints. This trend mirrors a wider industry migration towards green solutions, demanding ongoing adaptation and ingenuity.
The LM338K thrives in temperatures ranging from 0 °C to 125 °C. This flexibility caters to a plethora of uses, from everyday consumer gadgets to rigorous industrial contexts. Maintaining consistent device temperature is key, shaping both its performance and lifespan, thus offering you sufficient possibilities.
LM338K is a resilient three-terminal positive voltage regulator, delivering over 5 A between 1.2 V and 32 V. With just two resistors, it simplifies voltage management while mirroring the efficiency of advanced power systems. This straightforwardness appeals to those prioritizing reliable output, especially in space and budget-sensitive environments.
Encased in the Steel TO-3 transistor package, the LM338K is built for strength and effective heat management. This packaging is preferred for high-power tasks due to its superior thermal regulation, ensuring stability and prolonged reliability. Proper packaging selection is used for enhancing the safety and performance of any electronic component.