L4978D(2000) Просмотр технического описания (PDF) - STMicroelectronics

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Компоненты Описание

производитель

L4978D
(Rev.:2000)

2A STEP DOWN SWITCHING REGULATOR

STMicroelectronics 

Figure 1. Test and evaluation board circuit.

L4978

Vi=8V to 55V

C1

220µF

63V

C7

220nF

R1

20K

C2

2.7nF

5

L4978

3

2

7

1

C5

100nF C4

22nF

R2

9.1K

8

4

6

C6

100nF

D1

GI

SB560

L1

126µH

(77120)

C8

330µF

VO=3.3V/2A

R3

R4

C1=220µF/63V EKE

C2=2.7nF

C5=100nF

C6=100nF

C7=220nF/63V

C8=330µF/35V CG Sanyo

L1=126µH KoolMu 77120 - 55 Turns - 0.5mm

R1=20K

R2=9.1K

D1=GI SB560

D98IN834A

VO(V)

3.3

5.1

12

15

18

24

L4978

R3(KΩ)

0

2.7

12

16

20

30

R4(KΩ)

4.7

4.7

4.7

4.7

4.7

Figure 2. PCB and component layout of the figure 1.

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