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L5970D 데이터시트(PDF) 11 Page - STMicroelectronics

부품명 L5970D
상세설명  Up to 1A step down switching regulator
PDF  16 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5970D 데이터시트(HTML) 11 Page - STMicroelectronics

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L5970D
Application ideas
11/16
6
Application ideas
Figure 17. Dual output voltage with auxiliary winding
Figure 18. Buck-boost regulator
Figure 19. Positive Buck-Boost regulator
Figure 20.
Synchronization example
VIN=12V
C1
10uF
25V
Ceramic
D1
STPS25L25U
VCC
COMP
GND
OUT
FB
INH
SYNC VREF
L5970D
1
3
7
5
6
4
8
2
R3
4.7k
U1
C3
22nF
3.3V
VOUT=3.3V
0.5A
C2
220pF
VOUT1=5V
30mA
C5
47uF
10V
Lp=22uH
D2
1N4148
C4
100uF
10V
N1/N2=2
VIN=12V
C1
10uF
25V
Ceramic
D1
STPS2L25U
VCC
COMP
GND
OUT
FB
INH
SYNC VREF
1
3
7
5
6
4
8
2
R3
4.7k
U1
L1
33uH
2.7k
24k
C4
22nF
3.3V
C5
100uF
16V
L5970
VOUT=-12V/0.3A
C3
220pF
C2
10uF
35V
Ceramic
Vin=12V Vout=-12V
Iout=0.5A
Efficiency=81%
VIN=5V
C1
10uF
25V
Ceramic
D1
STPS2L25U
VCC
COMP
GND
OUT
FB
INH
SYNC VREF
L5970
1
3
7
5
6
4
8
2
R3
4.7k
U1
L1
33uH
24k
2.7k
C3
22nF
3.3V
C4
100uF
16V
VOUT=12V/0.3A
C2
220pF
D2
STPS2L25U
M1
STN4NE03L
Vin=5V Vout=12V Iout=0.3A Efficiency=76%
VCC
GND
OUT
FB
INH
SYNC VREF
1
3
7
5
6
4
8
2
L5970D
COMP
VCC
GND
OUT
FB
INH
SYNC VREF
1
3
7
5
6
4
8
2
L5970D
COMP
VIN



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