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L5970 数据表(PDF) 6 Page - STMicroelectronics

部件名 L5970
功能描述  UP TO 1A STEP DOWN SWITCHING REGULATOR
PDF  10 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L5970 数据表(HTML) 6 Page - STMicroelectronics

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L5970D
6/10
Figure 10. Demoboard schematic
Part list demoboard
Reference
Part Number
Description
Manufacturer
C1
10
µF, 25V
TOKIN
C2
POSCAP 10TPB100M
100
µF, 10V
Sanyo
C3
C1206C221J5GAC
220pF, 5%, 50V
KEMET
C4
C1206C223K5RAC
22nF, 10%, 50V
KEMET
R1
5.6K, 1%, 0.1W 0603
Neohm
R2
3.3K, 1%, 0.1W 0603
Neohm
R3
4.7K, 1%, 0.1W 0603
Neohm
D1
STPS2L25U
2A, 25V
STMicroelectronics
L1
DO3316P-333
33
µH, 2A
COILCRAFT
D03IN1437
8
2
4
5
1
7
L5970D
C1
10
µF
25V
CERAMIC
C2
100
µF
10V
VOUT=3.3V
VIN = 4.4V to 25V
R1
5.6K
R2
3.3K
R3
4.7K
C4
22nF
C3
220pF
3
6
D1
STPS2L25U
3.3V
INH.
SYNC.
COMP
VCC
VREF
OUT
FB
GND
L1 33
µH
Figure 11. Efficiency vs. Output Current
Figure 12. Efficiency vs. Output Current
70
72
74
76
78
80
82
84
86
88
90
92
94
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Io (A)
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vcc=5V
70
72
74
76
78
80
82
84
86
88
90
92
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Io (A)
Vcc=12V
Vo=5V
Vo=3.3V
Vo=2.5V



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