LM350K Texas Instruments Integrated Circuit (Other) In Stock
The LM350K is a 3 A adjustable positive linear voltage regulator with an output range of 1.2 V to 33 V and a dropout voltage of typically 2 V at full load. It features internal current limiting and thermal shutdown for robust protection in a TO-3 metal can package. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- LM350K Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $10.0000(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM350K?
- 3 A continuous output current with internal current limiting and thermal shutdown for robust protection in demanding power supplies
- Adjustable output from 1.2 V to 33 V using just two external resistors, covering a wide range of supply rail requirements
- TO-3 metal can package with superior thermal dissipation, ideal for high-current bench supplies and industrial power designs
What is LM350K used for?
The LM350K is widely used in adjustable bench power supplies, battery chargers, and industrial DC power rails requiring up to 3 A of regulated output. Its wide adjustment range of 1.2 V to 33 V with a single reference resistor pair makes it straightforward to design precision regulated supplies for analog circuits, relay drivers, and motor pre-drivers. The TO-3 package bolts directly to a chassis heatsink, enabling efficient thermal management in high-dissipation applications without additional heatsink hardware.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the LM350K datasheet?
LM350K Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM350K?
Compatible alternatives and drop-in replacements for LM350K:
Adjustable Positive Standard Regulator, 1.25V Min, 32V Max, BIPolar, PSFM3
Frequently Asked Questions
What output current and voltage range does the LM350K support for adjustable power supply designs?
The LM350K delivers up to 3 A of continuous output current with an adjustable output voltage spanning 1.2 V to 33 V, set by two external resistors. Internal current limiting engages when the output exceeds 3 A, protecting both the regulator and the load, while thermal shutdown activates if junction temperature approaches 150°C, preventing damage during fault conditions.
How does the LM350K's TO-3 package help manage heat in a high-current 3 A linear regulator application?
The TO-3 metal can package has a thermal resistance of approximately 3°C/W junction-to-case, far lower than plastic packages. When bolted to a chassis or external heatsink with thermal compound, the total junction-to-ambient resistance drops enough to sustain 3 A at input-to-output differentials up to 10 V, dissipating 30 W without exceeding the 150°C junction temperature limit.
When would an engineer choose the LM350K over the lower-current LM317 in a 12 V regulated supply design?
The LM317 is rated at 1.5 A, so for loads exceeding that—such as a 12 V rail powering multiple relays, fans, or motor pre-drivers drawing 2 A to 3 A—the LM350K is the direct upgrade. Both devices share the same adjust-pin architecture and 1.25 V reference, meaning LM350K is a pin-compatible drop-in with 2× current headroom, requiring only a larger heatsink to handle the higher 3 A dissipation.
What external components are required to set the LM350K output voltage, and how is the formula applied?
Only 2 resistors are needed: R1 (typically 120 Ω to 240 Ω) connected between output and adjust pins, and R2 between adjust pin and ground. The output voltage follows Vout = 1.25 V × (1 + R2/R1) + Iadj × R2. For a 5 V output with R1 = 240 Ω, R2 ≈ 720 Ω. Adding a 10 µF output capacitor improves transient response and keeps the regulator stable across the full load range.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $15.0000 | $15.00 |
| 3+ | $11.0000 | $33.00 |
| 8+ | $10.0000 | $80.00 |
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