L5972 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L5972' PDF : 10 Pages View PDF
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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