L4973 Просмотр технического описания (PDF) - STMicroelectronics

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Компоненты Описание

производитель

L4973

3.5A step down switching regulator

STMicroelectronics 

L4973

Typical characteristics

Figure 13. Reference voltage vs.

input voltage (pin 16)

VREF

(V)

5.15

Tj=25˚C

Pin 16

D97IN636A

5.1

Figure 14. Reference voltage vs.

reference input current

VREF

(V)

D97IN638

5.2

Vcc=40V

5.1

Vcc=10V

5.05

5.0

Tj=25˚C

5.0

0

10 20 30 40 50 VCC(V)

4.9

0

10 20 30 40 50 IREF(mA)

Figure 15. Inhibit current vs. inhibit

voltage (pin 10)

Iinh

(µA)

100

Vcc=35V

Pin 10

50

0

D97IN651

Tj=0˚C

Tj=25˚C

Tj=125˚C

Figure 16. Line regulation (see Figure 7)

VO

(V)

5.12

5.1

5.08

D97IN639A

Tj=125˚C

Tj=25˚C

IO = 1A

-50

0

5

10

15

Vinh(V)

5.06

0

10 20 30 40 50 VCC(V)

Figure 17. Load regulation (see Figure 7) Figure 18. Line regulation (see Figure 8)

VO

(V)

5.15

5.1

5.05

VCC = 35V

D97IN640

Tj=25˚C

Tj=125˚C

VO

(V)

3.35

3.34

3.33

3.32

3.31

D97IN660A

Tj=125˚C

Tj=25˚C

IO = 1A

5.0

0

1

2

3

IO(A)

3.3

0

10 20 30 40 50 VCC(V)

13/27

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