L5972D

8/10

APPLICATION IDEAS

Figure 15. Positive Buck-Boost regulator

Figure 16. Buck-Boost regulator

Figure 17. Dual output voltage with auxiliary winding

VIN=5V

C1

10uF

10V

Ceramic

D1

STPS2L25U

Vcc

COMP

GND

OUT

FB

L5972D

1

3

7

5

6

4

8

2

R3

4.7k

L1

33uH

24k

2.7k

C3

22nF

C4

100uF

16V

VOUT=12V/0.45A

C2

220pF

D2

STPS2L25U

M1

STN4NE03L

VIN=5V

C1

10uF

10V

Ceramic

D1

STPS2L25U

Vcc

COMP

GND

OUT

FB

L5972D

1

3

7

5

6

4

8

2

R3

4.7k

L1

33uH

2.7k

24k

C4

22nF

C5

100uF

16V

VOUT=-12V/0.45A

C3

220pF

C2

10uF

25V

Ceramic

VIN=12V

C1

10uF

25V

D1

STPS2L25U

Vcc

COMP

GND

OUT

FB

L5972D

1

3

7

5

6

4

8

2

R3

4.7k

C3

22nF

C4

100uF

10V

VOUT=3.3V

C2

220pF

VOUT1=5V

50mA

D2

STPS2L25U

C5

47uF

10V

N1

N2

n=N1/N2=2