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MIC2570 Datasheet(PDF) 11 Page - MIC GROUP RECTIFIERS

Part # MIC2570
Description  Two-Cell Switching Regulator
PDF  15 Pages
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Manufacturer  MIC [MIC GROUP RECTIFIERS]
Direct Link  http://www.cnmic.com
Logo MIC - MIC GROUP RECTIFIERS

MIC2570 Datasheet(HTML) 11 Page - MIC GROUP RECTIFIERS

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



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