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TL317CPWG4 Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce TL317CPWG4
Description  3-TERMINAL ADJUSTABLE REGULATOR
Download  18 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TL317CPWG4 Fiches technique(HTML) 5 Page - Texas Instruments

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TL317
3TERMINAL ADJUSTABLE REGULATOR
SLVS004G − APRIL 1979 − REVISED SEPTEMBER 2009
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
Figure 1. Adjustable Voltage Regulator
C1 = 0.1
µF
(see Note A)
VI
470
R1
R2
C2 = 1
µF
(see Note C)
VO
(see Note B)
Adjustment
Output
Input
TL317
NOTES: A. Use of an input bypass capacitor is recommended if
regulator is far from the filter capacitors.
B. Output voltage is calculated from the equation:
where: Vref equals the difference between OUTPUT and
ADJUSTMENT voltages (
≈1.25 V).
C. Use of an output capacitor improves transient response,
but is optional.
V
O + Vref 1 )
R2
R1
Figure 2. 0-V to 30-V Regulator Circuit
VO
(see Note A)
R2 = 3 k
1N4002
R3 =
820
−10 V
C1 = 0.1
µF
35 V
Adjustment
Output
Input
TL317
NOTE A: Output voltage is calculated from the equation:
where: Vref equals the difference between OUTPUT
and ADJUSTMENT voltages (
≈1.25 V).
R1 = 120
V
O + Vref 1 )
R2
) R3
R1
* 10 V
Figure 3. Regulator Circuit
With Improved Ripple Rejection
R1 =
470
D1†
1N4002
C3 = 1
µF
C2 = 10
µF
R2 =
10 k
VI
+
+
Adjustment
Output
Input
TL317
† D1 discharges C2 if output is shorted to ground.
NOTE A: Use of an output capacitor improves transient response, but is
optional.
VO
(see Note A)
C1 =
0.1
µF
Figure 4. Precision Current-Limiter Circuit
VI
R1
Adjustment
Output
Input
TL317
I
limit +
1.25
R1


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