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Description
5-Amp Adjustable Regulators
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FEATURES
● Specified 7A Peak Output Current
● Specified 5A Output Current
● Adjustable Output Down to 1.2V
● Specified Thermal Regulation
● Current Limit Constant with Temperature.
● P+ Product Enhancement Tested
● Output is Short-Circuit Protected
APPLICATIONS
● Adjustable Power Supplies
● Constant Current Regulators
● Battery Chargers
DESCRIPTION
The LM138 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 5A over a 1.2V to 32V output range. They are exceptionally easy to use and require only 2 resistors to set the output voltage. Careful circuit design has resulted in outstanding load and line regulation-comparable to many commercial power supplies.The LM138 family is supplied in a standard 3-lead transistor package.
A unique feature of the LM138family is time-dependent current limiting. The current limit circuitry allows peak currents of up to 12A to be drawn from the regulator for short periods of time.This allows the LM138 to be used with heavy transient loads and speeds start-up under full-load conditions. Under sustained loading conditions, the current limit decreases to a safe value protecting the regulator. Also included on the chip are thermal overload protection and safe area protection for the power transistor. Overload protection remains functional even if the adjustment pin is accidentally disconnected.
Normally, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors in which case an input bypass is needed. An output capacitor can be added to improve transient response, while bypassing the adjustment pin will increase the regulators ripple rejection.
Besides replacing fixed regulators or discrete designs, the LM138 is useful in a wide variety of other applications. Since the regulator is“floating”and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input to output differential is not exceeded, i.e., do not short-circuit output to ground. The part numbers in the LM138 series which have a K suffix are packaged in a standard Steel TO-3 package, while those with a T suffix are packaged in a TO-220 plastic package. The LM138 is rated for -55℃≤TJ ≤+150℃, and the LM338 is rated for 0℃≤ TJ ≤+125℃.
Preview of the first 3 pages of the data sheet
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241 buyer reviews from United Kingdom
Nicole Green
Length of registration:7 years
The LM338T/NOPB integrated circuit is a versatile and reliable voltage regulator that can provide up to 5A of output current. It is capable of regulating output voltages from 1.2V to 32V, making it suitable for a wide range of applications. The device also features a wide input voltage range, low dropout voltage, and low quiescent current, making it an ideal choice for power supply designs. I'm ve
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03/17/2023
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Warranty
All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
LM338T
LM338T has several brands around the world that may have alternate names for LM338T due to regional differences or acquisition. LM338T may also be known as the following names:
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Stock Status: 10000
Minimum: 3
Total Price:
Unit Price:0.68093
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