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EVAL5973AD

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
Application ideas L5973AD
16/22 Doc ID 9552 Rev 9
6 Application ideas
Figure 13. Positive buck-boost regulator
Figure 14. Buck-boost regulator
Figure 15. Dual output voltage with auxiliary winding
D03IN1455
8
4
5
1
7
L5973AD
C1
10μF
10V
CERAMIC
C2
10μF
25V
CERAMIC
C5
100μF
16V
VOUT=-12V
/
0.6A
VIN = 5V
2.7K
24K
R3
4.7K
C4
22nF
C3
220pF
3
L1 15μH
D1
STPS2L25U
COMP
VCC
OUT
FB
GNDINH
2
6
3.3V
SYNC.
VREF
D03IN1456
8
4
5
1
7
L5973AD
C1
10μF
25V
CERAMIC
C5
47μF
10V
C4
100μF
10V
VOUT=3.3V
/
0.5A
VOUT1=5V/
50mA
VIN = 5V
R3
4.7K
C3
22nF
C2
220pF
3
Lp 22μH
N1/N2=2
D1
STPS25L25U
D2
1N4148
COMP
VCC
OUT
FB
GNDINH
2
6
3.3V
SYNC.
VREF
L5973AD Application ideas
Doc ID 9552 Rev 9 17/22
Refer to L5973AD application note (AN1723) to have additional information, details, and
more application ideas.
L5973AD belongs to L597x family.
Related part numbers are:
● L5970D: 1.5 A (I
sw
), 250 kHz step down DC-DC Converter in SO8
● L5972D: 2 A (I
sw
), 250 kHz step down DC-DC Converter in SO8
● L5973D: 2.5 A (I
sw
), 250 kHz step down DC-DC Converter in HSOP8
In case higher current is needed, the nearest DC-DC Converter family is L497x.
Package mechanical data L5973AD
18/22 Doc ID 9552 Rev 9
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK is an ST trademark.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

EVAL5973AD

Mfr. #:
Buy EVAL5973AD
Manufacturer:
STMicroelectronics
Description:
Power Management IC Development Tools L5973AD 2A Step Down A5973 Regulator BRD
Lifecycle:
New from this manufacturer.
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