LM350
Figure 19. “Laboratory” Power Supply with Adjustable Current Limit and Output Voltage
D6
1N4002
Vin
32V
LM350
(1)
Vout1 RSC
Vin2
LM350
(2)
Vout 2
240
Adjust 1
Current
Limit
Adjust
1K
D1
1N4001
1N4001
D2
5.0K
Adjust 2
Voltage
Adjust
1N4001
D3
D4
–10V
Diodes D1 and D2 and transistor Q2 are added to allow adjustment
of output voltage to 0 V.
D6 protects both LM350’s during an input short circuit.
Q2
2N5640
1N4001
Output Range:
0
≤
VO
≤
25 V
0
≤
IO
≤
1.5 A
D5
IN4001
+
10µF
IO
VO
+
1.0µF
Tantalum
Vin1
0.1µF
Q1
2N3822
–10V
Figure 20. Adjustable Current Limiter
+25V
LM350
Vin
Adjust
* 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.
R2
≤
Vref
IDSS
VSS*
Vout
R1
620
Vout
Iout
Figure 21. 5.0 V Electronic Shutdown Regulator
D1
1N4002
Vin
Vout
LM350
+
120
Adjust
MPS2222
720
TTL
Control
1.0µF
R2
100
D1
1N4001
D2
1N4001
2N5640
1.0k
Vref
R1 =
IOmax + IDSS
VO < V(BR)DSS + 1.25 V + VSS
ILmin – IDSS < IO < 3.0 A
As shown O < IO < 1.0 A
Minimum Vout = 1.25 V
D1 protects the device during an input short circuit.
Figure 22. Slow Turn–On Regulator
Vin
LM350
240
Adjust
R2
MPS2907
50k
+
10µF
1N4001
Vout
Vin
Figure 23. Current Regulator
Vout
LM350
R1
Iout
Adjust
Iout
IAdj
+
^
Vref
R1
)
IAdj
1.25 V
R1
10 mA
≤
Iout
≤
3.0 A
8
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA, INC ]
