LM338T/NOPB

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Details for Texas Instruments

LM338T/NOPB

5-A adjustable output linear regulator
Buy Directly from Texas Instruments (16046 in Stock)
$0.8100 per unit
Series Information for LM338T/NOPB - Texas Instruments

Features

  • feature
    Adjustable Output Down to 1.2 V
  • feature
    Current Limit Constant With Temperature
  • feature
    Output is Short-Circuit Protected
  • feature
    P + Product Enhancement Tested
  • feature
    Specified 5-A Output Current
  • feature
    Specified 7-A Peak Output Current
  • feature
    Specified Thermal Regulation

Description

IC V REG LINEAR ADJ
The LM138 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 5 A over a 1.2-V to 32-V 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 LM138 family is timedependent current limiting. The current limit circuitry allows peak currents of up to 12 A 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 (ADJ) 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 increases the ripple rejection of the regulator. Besides replacing fixed regulators or discrete designs, the LM138 is useful in a wide variety of other applications. Because the regulator is floating and receives 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; 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-CAN package, while those with a T suffix are packaged in a TO-220 plastic package. The LM138 is rated for TJ = –55°C to 150°C, and the LM338 is rated for TJ = 0°C to 125°C.

Specifications

Fixed Output Voltage Nom.:
-
Adjustable Output Voltage Min:
1.2V
Adjustable Output Voltage Max:
37V
Input Voltage Min:
4.2V
Input Voltage Max:
40V
Product Range:
LM138
Output Current:
5A
Output Type:
Adjustable
Linear Regulator Case Style:
TO-220
No. of Pins:
3Pins
Operating Temperature Min:
0°C
Operating Temperature Max:
125°C
Automotive Qualification Standard:
-
MSL:
-
SVHC:
No SVHC (27-Jun-2018)
No. of Outputs:
1Outputs
Operating Temperature Range:
0°C to +125°C
Output Voltage Adjustable Range:
1.2V to 32V
Output Voltage Max:
37V
Output Voltage Min:
1.2V
Primary Input Voltage:
35V
Supply Voltage Max:
40V
Supply Voltage Min:
3V
Termination Type:
Through Hole
Voltage Regulator Type:
3-Terminal Adjustable Positive

Alternate Descriptions

Avnet America

Standard Regulator Pos 1.2V to 32V 5A 3-Pin(3+Tab) TO-220 Rail

Avnet America product

Avnet Europe

Standard Regulator Pos 1.2V to 32V 5A 3-Pin(3+Tab) TO-220 Rail

Avnet Europe product

Texas Instruments

5-A adjustable output linear regulator

Texas Instruments product

Distrelec

1.4

Distrelec product

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