Texas Instruments LM338T Adjustable Voltage Regulator 3 Terminal 5A TO220

Name: Texas Instruments LM338T Adjustable Voltage Regulator 3 Terminal 5A TO220
Brand: Texas Instruments
Price: 7.30 GBP
Availability: InStock

Order Code:

47-3322

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Country of Origin: Malaysia
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1,750 in Stock, despatched same dayAdditional quantity lead time 14 days

Product Details
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Adjustable 3-terminal voltage regulator from the LM138 series, capable of supplying in excess of 5A. Typical applications includes adjustable power supplies, constant current regulators and battery chargers.

Adjustable output voltage 1.2 to 37V
Output current 5A
TO-220 case

Number of Outputs	Single
Operating Temperature Range	0 to +125°C
Output Current	5A
Output Voltage	Adjustable
Package/Case	TO-220
Regulator Type	Fixed positive

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08 February 2016 Question by: Rapid Customer | Product code: 47-3322

Q. Ref LM338T in the TO220 package, I wish to construct the adjustable voltage regulator in the schematic on page six of the PDF's. It will need to give an output of 5volts and the existing circuit I have draws 650ma. My question is what should the variable resistor (R2) be rated at in terms of watts please? Also if you could make a possible recommendation of a suitable component together with part number from your range that would be most helpful. For info I have tried using the more common 7805 chip to power this circuit, which is supposedly rated at 1.5amps max, however I find it gets rather warm even with an aluminium heat sink, hence opting for the rather higher output of the 338. Best regards Mike B.

A. Hi Mike, thank you for your question. Standard 0.25W resistors are used for the voltage setting circuit.

19 July 2015 Question by: Rapid Customer | Product code: 47-3322

Q. LM338T voltage regulator Code 47-3322 how much more than 5 amps will it supply

A. Hi Howard, thank you for your question. An LM338T regulator's absolute maximum rating is 5A, for this rating adequate thermal protection (heat sink and heat sink compound) would be required.