L5970D013 STMicroelectronics, L5970D013 Datasheet - Page 8

• Manufacturer Part Number: L5970D013
• Description: UP TO 1A STEP DOWN SWITCHING REGULATOR
• Manufacturer: STMicroelectronics

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