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LM317 View Datasheet(PDF) - Motorola => Freescale

Part NameLM317 Motorola
Motorola => Freescale Motorola
DescriptionThree-terminal adjustible output positive voltage regulator
LM317 Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
LM317
Figure 20. ‘‘Laboratory’’ Power Supply with Adjustable Current Limit and Output Voltage
D6*
Vin
32 V to 40 V
Vin1
0.1 µF
LM317
(1)
1N4002
Vout1 RSC
Adjust 1
Current
Limit
Adjust
* Diodes D1 and D2 and transistor Q2 are added to
* allow adjustment of output voltage to 0 V.
1.0K
Q1
2N3822
* D6 protects both LM317’s during an input short circuit.
–10 V
Vin2
D1
1N4001
D2
1N4001
LM317
(2)
Vout 2
240
Adjust 2
5.0 k
Voltage
Adjust
1N4001
D5
IN4001
+
10 µF
Iout
Vout
+
1.0 µF
Tantalum
D3
Output Range: 0 VO 25 V
D4
Output Range: 0 IO 1.5 A
Q2
2N5640
IN4001
–10 V
Figure 21. Adjustable Current Limiter
+25 V
Vout R1
LM317
Iout
Vin
1.25
Adjust
R2
100
* To provide current limiting of IO to the system
* ground, the source of the FET must be tied to a
* negative voltage below – 1.25 V.
R1 =
Vref
IOmax + IDSS
R2
Vref
IDDS
VO < BVDSS + 1.25 V + VSS,
ILmin – IDSS < IO < 1.5 A.
As shown 0 < IO < 1.0 A.
D1
1N4001
D2
1N4001
2N5640
VSS*
Figure 22. 5.0 V Electronic Shutdown Regulator
D1*
1N4002
Vin
Vout
LM317
+
120
1.0 µF
Adjust
720
MPS2222
1.0 k
TTL
Control
Minimum Vout = 1.25 V
* D1 protects the device during an input short circuit.
Figure 23. Slow Turn–On Regulator
Vin
LM317
Vout
240
1N4001
Adjust
R2
50 k
MPS2907
+
10 µF
8
Figure 24. Current Regulator
Vin
Vout R1
Iout
LM317
Adjust
ǒ ǓIAdj
+ ) Iout
Vref
R1
IAdj
+ 1.25 V
R1
10 mA Iout 1.5 A
MOTOROLA ANALOG IC DEVICE DATA
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