Product Summary

The LM138K is adjustable 3-terminal positive voltage regulators capable of supplying in excess of 5 A over a 1.2 V to 32 V

output range. It is 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.

Parametrics

LM138K Parametrics:

Packaging Tray
Regulator Topology Positive Adjustable
Voltage - Output 1.2 V ~ 32 V
Current - Output 5A
Voltage - Dropout (Typical) -
Number of Regulators 1
Voltage - Input -
Current - Limit (Min) 7A
Operating Temperature -55°C ~ 150°C
Mounting Type Through Hole
Package / Case TO-204AA, TO-3
Supplier Device Package TO-3
Other Names 497-6706
LM138K-ND

Features

LM138K Features:


  • Guaranteed 7 A peak output current
  • Guaranteed 5 A output current
  • Adjustable output down to 1.2 V
  • Line regulation typically 0.005 %/V
  • Load regulation typically 0.1 %
  • Guaranteed thermal regulation
  • Current limit constant with temperature
  • Standard 3-lead transistor package


Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LM138K STEEL
LM138K STEEL

National Semiconductor (TI)

Linear Regulators - Standard

Data Sheet

Negotiable 
LM138K-MIL
LM138K-MIL

National Semiconductor (TI)

Linear Regulators - Standard

Data Sheet

Negotiable 
LM138KSTEEL
LM138KSTEEL

National Semiconductor (TI)

Linear Regulators - Standard

Data Sheet

0-50: $27.29
50-100: $25.48
100-250: $23.84
LM138KSTEEL/NOPB
LM138KSTEEL/NOPB

National Semiconductor (TI)

Linear Regulators - Standard

Data Sheet

0-32: $26.30
32-100: $25.48
100-250: $23.84
LM138K STEEL/NOPB
LM138K STEEL/NOPB


IC REG LDO ADJ 5A TO-3

Data Sheet

0-50: $26.30
LM138K
LM138K

STMicroelectronics

Linear Regulators - Standard 1.2-32V Adj Positive

Data Sheet

0-1: $7.70
1-10: $6.58
10-100: $5.99
100-250: $5.43