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0.33432 2.23520
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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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Description
LM338T
Stock:9999 |
National Semiconductor 03 |
5-Amp Adjustable Regulators |
≥1: US $0.83580 US $0.75222 ≥5: US $0.62685 US $0.56417 ≥10: US $0.43880 US $0.39492 ≥20: US $0.41790 US $0.37611 ≥50: US $0.37611 US $0.33850 ≥100: US $0.36566 US $0.32909 ≥200: US $0.35522 US $0.31970 ≥500: US $0.34477 US $0.31029 ≥1000: US $0.33432 US $0.30089
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Inquiry
|
LM338T
Stock:37459 |
National Semiconductor 00+ |
IC REG LINEAR POS ADJ 5A TO220-3 |
≥1: US $0.83820 US $0.75438 ≥5: US $0.62865 US $0.56579 ≥10: US $0.44006 US $0.39605 ≥20: US $0.41910 US $0.37719 ≥50: US $0.37719 US $0.33947 ≥100: US $0.36671 US $0.33004 ≥200: US $0.35624 US $0.32061 ≥500: US $0.34576 US $0.31118 ≥1000: US $0.33528 US $0.30175
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Inquiry
|
LM338T
Stock:39 |
National Semiconductor 15+/13+ |
TO220 |
≥1: US $0.78232 US $0.70409
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Inquiry
|
LM338T
Stock:67 |
National Semiconductor 00+ |
5-Amp Adjustable Regulators |
≥1: US $2.23520 US $2.10109
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Inquiry
|
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℃.
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