LM138KSTEEL/NOPB Texas Instruments Integrated Circuit (Other) In Stock
The LM138KSTEEL/NOPB is a Texas Instruments 5A adjustable linear voltage regulator accepting 4.2V to 40V input with 3V minimum dropout voltage. It provides exceptional 0.04%/V line regulation and 0.6% load regulation in a robust steel TO-3 metal can package for high-current applications. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- LM138KSTEEL/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM138KSTEEL/NOPB?
- 5A output current capability with adjustable output voltage from 1.25V to 37V using two external resistors, covering a wide range of regulated supply needs
- Excellent 0.04%/V line regulation and 0.6% load regulation with 40V maximum input voltage for high-performance linear power supply designs
- Hermetic steel TO-3 metal can package providing superior thermal dissipation and mechanical ruggedness for industrial and military power supply applications
What is LM138KSTEEL/NOPB used for?
The LM138KSTEEL/NOPB is used in bench power supplies, laboratory instruments, and industrial power conditioning circuits requiring high output current with precise adjustable voltage regulation. Its robust TO-3 steel package and wide input voltage range make it suitable for military, aerospace, and harsh-environment applications where reliability under thermal stress is critical. It also serves in high-current battery chargers and post-regulation stages in switch-mode power supplies where low output noise is essential.
What are the specifications of LM138KSTEEL/NOPB?
| YTEOL | 15 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Nom | 3V |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 4.2V |
| Input-Output Voltage Differential-Max | 40V |
| Input-Output Voltage Differential-Min | 3V |
| JESD-30 Code | O-XBFM-P2 |
| Line Regulation-Max (%/V) | 0.04 |
| Load Regulation-Max(%) | 0.6% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 150°C |
| Operating Temperature TJ-Min | -55 °C |
| Output Current1-Max | 5A |
| Output Voltage1-Max | 32V |
| Output Voltage1-Min | 1.24V |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | TO-204/-3 |
| Package Shape | ROUND |
| Package Style | FLANGE MOUNT |
| Packing Method | TRAY |
| Qualification Status | Not Qualified |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Terminal Form | PIN/PEG |
| Terminal Position | BOTTOM |
| Voltage Tolerance-Max | 4% |
| ## LM138KSTEEL/NOPB Alternates Showing results | Image |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM138KSTEEL/NOPB datasheet?
LM138KSTEEL/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM138KSTEEL/NOPB?
Compatible alternatives and drop-in replacements for LM138KSTEEL/NOPB:
Regulator, 1.2V Min, 32V Max, BIPolar, MBFM2
suggested
suggested
suggested
suggested
Frequently Asked Questions
What is the output current rating of the LM138KSTEEL/NOPB?
The LM138KSTEEL/NOPB is rated for up to 5A continuous output current, making it suitable for high-power linear regulation applications such as motor drives, battery chargers, and bench power supplies requiring significant load current.
What input voltage range does the LM138KSTEEL/NOPB support?
The LM138KSTEEL/NOPB accepts input voltages from 4.2V to 40V, with a maximum input-to-output voltage differential of 40V. The minimum dropout voltage is 3V, which must be maintained between input and output for proper regulation.
How is the output voltage of the LM138KSTEEL/NOPB set?
The output voltage is adjustable from 1.25V to 37V using two external resistors connected to the ADJ pin. This flexibility allows the same device to generate various regulated voltage rails simply by changing the resistor ratio.
What package does the LM138KSTEEL/NOPB use and what are its thermal advantages?
The LM138KSTEEL/NOPB uses a hermetic steel TO-3 metal can package (JEDEC O-XBFM-P2), which provides excellent thermal conductivity when mounted to a heatsink. The metal case enables direct chassis mounting for superior heat dissipation in high-power designs.
Is the LM138KSTEEL/NOPB suitable for military or harsh-environment applications?
Yes, the LM138KSTEEL/NOPB is available in a hermetically sealed steel TO-3 package suited for harsh environments, military equipment, and industrial applications where the device may be exposed to moisture, vibration, and wide temperature extremes.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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