LM350BT 데이터 시트보기 (PDF) - Motorola => Freescale

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LM350BT

Three–Terminal Adjustable Output Positive Voltage Regulator

Motorola => Freescale 

LM350

Figure 19. “Laboratory” Power Supply with Adjustable Current Limit and Output Voltage

D6

1N4002

Vin

32V

Vin1

LM350

(1)

Vout1 RSC

0.1µF

Adjust 1

Current 1K

Limit

Adjust

Q1

2N3822

–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.

Vin2

D1

1N4001

1N4001

D2

LM350

(2)

Vout 2

240

Adjust 2

5.0K

Voltage

Adjust

1N4001

D3

D4

Q2

2N5640

1N4001

–10V

D5

IN4001

+

10µF

IO

VO

+

1.0µF

Tantalum

Output Range:

0 ≤ VO ≤ 25 V

0 ≤ IO ≤ 1.5 A

Figure 20. Adjustable Current Limiter

+25V

Vout R1

Vout

Iout

LM350

Vin

620

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

R1 =

Vref

IOmax + IDSS

VO < V(BR)DSS + 1.25 V + VSS

ILmin – IDSS < IO < 3.0 A

As shown O < IO < 1.0 A

R2

D1

1N4001

100

D2

1N4001

2N5640

VSS*

Figure 22. Slow Turn–On Regulator

Vin

LM350

Vout

240

1N4001

Adjust

R2

50k

MPS2907

+

10µF

Figure 21. 5.0 V Electronic Shutdown Regulator

D1

1N4002

Vin

Vout

LM350

+

120

1.0µF

Adjust

720

MPS2222

1.0k

TTL

Control

Minimum Vout = 1.25 V

D1 protects the device during an input short circuit.

Figure 23. Current Regulator

Vin

Vout R1

Iout

LM350

Adjust

IAdj

ǒ Ǔ+ ) Iout

Vref

R1

IAdj

^ 1.25 V

R1

10 mA ≤ Iout ≤ 3.0 A

8

MOTOROLA ANALOG IC DEVICE DATA

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