L4973D3.3-L4973D5.1 Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

L4973D3.3-L4973D5.1

3.5A STEP DOWN SWITCHING REGULATOR

STMicroelectronics 

L4973V3 - L4973V5 - L4973D3 - L4973D5

Figure 1c: Application Circuit (see fig. 1 part list)

VCC

INH SYNC

R2

7,8

10

18

9

C8

1

17 L4973V5.1

C1 C2 C7

L1

16

4,5,6

2,3

Vo

11

13,14,15 12

C3 C4 C5

R1

C6

D1

3x

C12

C0

D97IN665A

Figure 1d: Application Circuit (see fig. 1 part list)

VCC

INH

SYNC

R2

C1 C2 C7

7,8 10

18

9

C8

1

17 L4973V3.3

L1

16

4,5,6

2,3

11

13,14,15 12

C3 C4 C5

R1

C6

D1

3x

C0

Vo

C12

Figure 2: Quiescent Drain Current vs. Input

Voltage (0% Duty Cycle)

D97IN664A

Figure 3: Quiescent Drain Current vs. Junction

Temperature

Ibias

(mA)

5.0

4.5

4.0

3.5

3.0

2.5

Tamb=25°C

0% DC

D97IN633A

200KHz-R2=22K

C7=1.2nF

100KHz-R2=20K

C7=2.7nF

0Hz

Ibias

(mA)

4.0

3.5

0% DC

VCC = 35V

3.0

D97IN634

200KHz-R2=22K

C7=1.2nF

100KHz-R2=20K

C7=2.7nF

0Hz

2.0

0

10 20 30 40 50 VCC(V)

2.5

-50

0

50

100

Tj(°C)

7/16

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