MIC2570 查看數據表（PDF） - Micrel
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MIC2570 Datasheet PDF : 15 Pages
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MIC2570
C2
68µF, 35V
C1
2.0V to 3.1V 330µF
2 Cell
16V
L1
47µH
U1
8
IN
SW 1
MIC2570
FB 6
SYNC GND
7
2
D1
D2
D3
1N5819
1N5819
C3
68µF
35V
1N5819
R2
2.2M
1%
R1
10k
1%
U1 Micrel
C1 Sanyo
C2 Sanyo
C3 Sanyo
C4 Sanyo
D1 Motorola
D2 Motorola
D3 Motorola
L1 Sumida
MIC2570-2BM
VOU T = 0.22 ×(1+R2/R1)
16MV330GX Electrolytic ESR = 0.1Ω
35MV68GX Electrolytic ESR = 0.22Ω
35MV68GX Electrolytic ESR = 0.22Ω
63MV826X Electrolytic ESR = 0.34Ω
1N5819
1N5819
1N5819
RCH106-470k DCR = 0.16Ω
VO U T
50V/10mA
C4
82µF
63V
Example 9. Voltage Doubler
C1
2.0V to 3.1V 100µF
2 Cell
10V
D1
L1 MBRA140
47µH
U1
8
IN
SW 1
MIC2570
FB 6
SYNC GND
7
2
D2
LED
X5 ILED
R1
11k
1%
C2
220µF
10V
U1 Micrel
C1 AVX
C2 AVX
D1 Motorola
L1 Coilcraft
I = 0.22V/R1
MIC2570-2BM
TPSD107M010R0100 Tantalum ESR = 0.1Ω
TPSE227M010R0100 Tantalum ESR = 0.1Ω
MBRA140T3
DO3316P-473 DCR = 0.12Ω
Example 10. Constant-Current LED Supply
C1
2.0V to 3.1V 100µF
2 Cell
10V
L1
D1
47µH
U1
8
MBRA140
IN
SW 1
MIC2570
FB 6
SYNC GND
D2
7
2 1N4148
R2
434k
1%
R1
20k
1%
VO U T
5V/100mA
C2
220µF
10V
VOU T = 0.22V × (1+R2/R1)
Enable
Shutdown
R3
100k
74C04
U1 Micrel
C1 AVX
C2 AVX
D1 Motorola
L1 Coilcraft
MIC2570-2BM
TPSD107M010R0100 Tantalum ESR = 0.1Ω
TPSE227M010R0100 Tantalum ESR = 0.1Ω
MBRA140T3
DO3316P-473 DCR = 0.12Ω
Example 11. 5V/100mA Regulator with Shutdown
Micrel, Inc.
August 2007
11
MIC2570
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