LM350BT Motorola, LM350BT Datasheet - Page 8

• Manufacturer Part Number: LM350BT
• Description: Search -----> LM350
• Manufacturer: Motorola

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* To provide current limiting of I O
8
to the system ground, the source of
the FET must be tied to a negative
voltage below –1.25 V.
R 2
R 1 =
V O < V (BR)DSS + 1.25 V + V SS
I Lmin – I DSS < I O < 3.0 A
As shown O < I O < 1.0 A
+25V
V in
I DSS
I Omax + I DSS
V ref
V in
Figure 20. Adjustable Current Limiter
Figure 22. Slow Turn–On Regulator
Diodes D 1 and D 2 and transistor Q 2 are added to allow adjustment
of output voltage to 0 V.
D 6 protects both LM350’s during an input short circuit.
V ref
Adjust
32V
V in
Adjust
Figure 19. “Laboratory” Power Supply with Adjustable Current Limit and Output Voltage
LM350
R 2
LM350
V in1
0.1 F
MPS2907
V out
V out
LM350
240
620
R 1
(1)
100
50k
R 2
Adjust 1
V out
V SS *
+
1N4001
10 F
Current
V out1 R SC
Adjust
Limit
2N5640
D 1
1N4001
D 2
1N4001
2N3822
I out
Q 1
1N4002
1K
–10V
D 6
LM350
D 1
1N4001
1N4001
D 2
V in2
Figure 21. 5.0 V Electronic Shutdown Regulator
2N5640
5.0K
Q 2
V in
V in
LM350
D 1 protects the device during an input short circuit.
–10V
(2)
Adjust 2
Figure 23. Current Regulator
Adjust
Adjust
1N4001
1N4001
720
MOTOROLA ANALOG IC DEVICE DATA
LM350
LM350
Voltage
Adjust
D 3
D 4
240
1N4002
V out 2
D 1
10 mA I out 3.0 A
I out
+
^
I Adj
120
V out
Minimum V out = 1.25 V
+
IN4001
V out
1.25 V
D 5
V ref
R 1
10 F
R 1
Output Range:
0 V O 25 V
0 I O 1.5 A
MPS2222
1.0k
R 1
)
+
I Adj
1.0 F
I O
+
1.0 F
Tantalum
TTL
Control
V O
I out