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L5973AD

5

APPLICATION IDEAS

Figure 14. Positive Buck-Boost regulator

Figure 15. Buck-Boost regulator

Figure 16. Dual output voltage with auxiliary winding

Refer to L5973AD application note (AN1723) to have additional information, details, and more application

ideas.

L5973AD belongs to L597x family.

Related part numbers are:

●

●

●

In case higher current is needed, the nearest DC-DC Converter family is L497x.

VIN=5V

C1

10uF

10V

Ceramic

D1

STPS2L25U

Vcc

COMP

GND

OUT

FB

INH

SYNC

VREF

L5973AD

1

3

7

5

6

4

8

2

R3

4.7k

L1

15uH

24k

2.7k

C3

22nF

3.3V

C4

100uF

16V

VOUT=12V/0.6A

C2

220pF

D2

STPS2L25U

M1

STN4NE03L

D03IN1455

8

4

5

1

7

L5973AD

C1

10

µF

10V

CERAMIC

C2

10

µF

25V

CERAMIC

C5

100

µF

16V

VOUT=-12V/

0.6A

VIN = 5V

2.7K

24K

R3

4.7K

C4

22nF

C3

220pF

3

L1 15

µH

D1

STPS2L25U

COMP

VCC

OUT

FB

GND

INH

2

6

3.3V

SYNC.

VREF

D03IN1456

8

4

5

1

7

L5973AD

C1

10

µF

25V

CERAMIC

C5

47

µF

10V

C4

100

µF

10V

VOUT=3.3V/

0.5A

VOUT1=5V/

50mA

VIN = 5V

R3

4.7K

C3

22nF

C2

220pF

3

Lp 22

µH

N1/N2=2

D1

STPS25L25U

D2

1N4148

COMP

VCC

OUT

FB

GND

INH

2

6

3.3V

SYNC.

VREF