L5972 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

比赛名单

L5972

2A SWITCH STEP DOWN SWITCHING REGULATOR

STMicroelectronics 

L5972D

APPLICATION IDEAS

Figure 15. Positive Buck-Boost regulator

VIN=5V

C1

10uF

10V

Ceramic

Vcc

8

COMP

4

2

C2

220pF

C3

22nF

R3

4.7k

L5972D

67

GND

OUT

1

FB

5

3

D1

STPS2L25U

L1

33uH

D2

STPS2L25U

VOUT=12V/0.45A

24k

C4

M1

100uF

STN4NE03L

16V

2.7k

Figure 16. Buck-Boost regulator

VIN=5V

Vcc

8

OUT

1

C1

10uF

10V

Ceramic

C2

10uF

25V

C3

Ceramic 220pF

COMP

4

2

C4

22nF

R3

4.7k

L5972D

67

GND

FB

5

3

2.7k

24k

L1

33uH

D1

STPS2L25U

C5

100uF

16V

VOUT=-12V/0.45A

Figure 17. Dual output voltage with auxiliary winding

VIN=12V

Vcc

8

OUT

1

C1

10uF

25V

COMP

4

2

C2

220pF

C3

22nF

R3

4.7k

L5972D

67

GND

FB

5

3

n=N1/N2=2 D2

N2

STPS2L25U

VOUT1=5V

50mA

N1

D1

STPS2L25U

VOUT=3.3V

C4

100uF

10V

C5

47uF

10V

8/10

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