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LM138 Fiches technique(PDF) 8 Page - Linear Technology

No de pièce LM138
Description  5A Positive Adjustable Voltage Regulator
PDF  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
Logo LINER - Linear Technology

LM138 Fiches technique(HTML) 8 Page - Linear Technology

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LT138A/LT339A
LM138/LM338
8
138afd
For more information www.linear.com/LT138A
applicaTions inForMaTion
Figure 3. Connections for Best Load Regulation
LT338A
RP
PARASITIC
LINE RESISTANCE
VIN
R1
CONNECT
R1 TO CASE
CONNECT
R2 TO LOAD
138A/338A F03
VOUT
ADJ
VIN
RL
R2
Typical applicaTions
Improving Ripple Rejection
1.2V to 25V Adjustable Regulator
LT338A
VIN
R1
121Ω
1%
R2
365Ω
1%
1μF
*C1 IMPROVES RIPPLE REJECTION, XC
SHOULD BE SMALL COMPARED TO R2
CL*
10μF
138A/338A TA03
VOUT
ADJ
5V
VIN
+
+
LT338A
VIN
R1
240Ω
C1*
1μF
NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS
OPTIONAL, IMPROVES TRANSIENT RESPONSE
R2
5k
138A/338A TA04
VOUT
ADJ
VOUT†
VIN
+
C2**
1μF
*
**
+
†VOUT = 1.25V
R2
R1
1 +
( )



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