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參數(shù)資料
| 型號(hào)： | LM317L |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | 100 mA Adjustable Output, Positive Voltage Regulator(低電流1.2V~37V可調(diào)電壓穩(wěn)壓器) |
| 中文描述： | 可調(diào)輸出為100 mA，正電壓穩(wěn)壓器（低電流為1.2V?片山可調(diào)電壓穩(wěn)壓器） |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大小： | 131K |
| 代理商： | LM317L |
LM317L
http://onsemi.com
9
Protection Diodes
When external capacitors are used with any IC regulator
it is sometimes necessary to add protection diodes to prevent
the capacitors from discharging through low current points
into the regulator.
Figure 14 shows the LM317L with the recommended
protection diodes for output voltages in excess of 25 V or
high capacitance values (C
O
> 10 F, C
Adj
> 5.0 F). Diode
D
1
prevents C
O
from discharging thru the IC during an input
short circuit. Diode D
2
protects against capacitor C
Adj
discharging through the IC during an output short circuit.
The combination of diodes D
1
and D
2
prevents C
Adj
from
discharging through the IC during an input short circuit.
D
1
V
in
C
in
1N4002
LM317L
V
out
R
1
+
C
O
D
2
R
2
C
Adj
1N4002
Adjust
Figure 18. Voltage Regulator with
Protection Diodes
Figure 19. Adjustable Current Limiter
Figure 20. 5.0 V Electronic Shutdown Regulator
Figure 21. Slow TurnOn Regulator
Figure 22. Current Regulator
V
ref
+25V
V
in
LM317L
V
out
R
1
V
O
1.25k
Adjust
I
O
D2
1N914
1N5314
R
2
500
* To provide current limiting of I
O
to the system ground, the source of
the current limiting diode must be tied to
a negative voltage below 7.25 V.
R
2
≥
V
ref
I
DSS
R
1
=
V
SS
*
D1
1N914
V
O
< P
OV
+ 1.25 V + V
SS
I
Lmin
I
P
< I
O
< 100 mA I
P
As shown O < I
O
< 95 mA
+
10 F
V
in
V
out
240
1N4002
LM317L
Adjust
MPS2907
R
2
50k
V
in
D
1
1N4002
V
out
120
Adjust
720
+
1.0 F
MPS2222
1.0k
TTL
Control
LM317L
Minimum V
out
= 1.25 V
D
1
protects the device during an input short circuit.
LM317L
V
in
R
1
R
2
Adjust
I
Adj
I
out
I
outmax
=
V
ref
R
1
+ I
Adj
5.0 mA < I
out
< 100 mA
V
out
1.25 V
R
1
I
outmax
=
V
ref
+ I
Adj
1.25 V
R
1
+ R
2
I
Omax
+ I
DSS
R
1
+ R
2
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LM317L/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Three-Terminal Adjustable Output Voltage Regulator |
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| LM317L_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3-Terminal Adjustable Regulator |
| LM317L_09 | 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:ADJUSTABLE VOLTAGE REGULATOR (POSITIVE) |
| LM317L3 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Three Terminal Adjustable Output Positive Voltage Regulators |
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