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| 型號： | L317LC |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 3-TERMINAL ADJUSTABLE REGULATOR |
| 中文描述： | 三端可調(diào)穩(wěn)壓 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 266K |
| 代理商： | L317LC |
SLCS144 JULY 2004
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
Figure 1. Adjustable Voltage Regulator
C1 = 0.1
μ
F
(see Note A)
VI
470
R1
R2
C2 = 1
μ
F
(see Note C)
VO
(see Note B)
Adjustment
Output
Input
LM317L
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:
R2
R1
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
V
ref
1
Figure 2. 0-V to 30-V Regulator Circuit
VO
(see Note A)
R2 = 3 k
1N4002
R3 =
820
10 V
C1 = 0.1
μ
F
35 V
Adjustment
Output
Input
LM317L
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
V
ref
1
R2
R3
R1
10 V
Figure 3. Regulator Circuit
With Improved Ripple Rejection
R1 =
470
D1
1N4002
C3 = 1
μ
F
C2 = 10
μ
F
R2 =
10 k
VI
+
+
Adjustment
Output
Input
LM317L
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
μ
F
Figure 4. Precision Current-Limiter Circuit
VI
R1
Adjustment
Output
Input
LM317L
I
limit
1.25
R1
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