MC34063A 查看數據表（PDF） - Wing Shing International Group

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MC34063A

DC-TO-DC Converter Control Circuits

Wing Shing International Group 

MC34063A

DC-TO-DC Converter Control Circuits

TYPICAL APPLICATION(CONTINUED)

8

7

RSC

VIN

6

5

SQ

R

1

Q2

Q1

2

Ipk

Oscillator

3

1.25V

Reference

Comparator

Regulator

4

VOUT

+

Figure 11. Step-up with External NPN Switch

8

SQ

R

1

Q2

Q1

7

RSC

VIN

6

5

2

Ipk

Oscillator

3

1.25V

Reference

Comparator

Regulator

4

Figure 12. Step-down with External NPN Switch

VOUT

+

9

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