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| MIC4684 Datasheet, PDF (14/16 Pages) Micrel Semiconductor – 2A High-Efficiency SuperSwitcher Buck Regulator | |||
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MIC4684
Micrel
Recommended Components for a Given Output Voltage (Standard Configuration)
VIN = 4V to 30V
VOUT IOUT R1
5.0V 1.7A 3.01k
R2
976kâ¦
VIN
8Vâ30V
3.3V 1.5A 3.01k 1.78k 7Vâ28V
2.5V 1.5A 3.01k 2.94k 6.5Vâ23V
1.8V 1.5A 3.01k 6.49k 6Vâ17V
CIN
33µF, 35V
Vishay-Dale
595D336X0035R2T
33µF, 35V
Vishay-Dale
595D336X0035R2T
33µF, 35V
Vishay-Dale
595D336X0035R2T
47µF, 25V
Vishay-Dale
595D476X0025D2T
D1
3A, 40V
Schotty
SS34
3A, 40V
Schotty
SS34
3A, 40V
Schotty
SS334
3A, 40V
Schotty
SS334
L1
68µH
Sumida
CDRH104R-680MC
68µH
Sumida
CDRH104R-680MC
68µH
Sumida
CDRH104R-680MC
68µH
Sumida
CDRH104R-680MC
COUT
120µF, 6.3V
Vishay-Dale
594D127X06R3C2T
220µF, 6.3V
Vishay-Dale
594D227X06R3C2T
330µF, 6.3V
Vishay-Dale
594D337X06R3D2T
330µF, 6.3V
Vishay-Dale
594D337X06R3D2T
Table 2. Recommended Components for Common Ouput Voltages
(VIN = 4V to 30V)
J1
VIN
4V to +30V
(34V transient)
C1
ON
15µF
35V
OFF
J3
GND
C2
0.1µF
50V
U1 MIC4684BM
3 VIN
SW 1
BS 4
8 EN
FB 5
GND
SOP-8
2, 6, 7
L1
47µH
C6
0.33µF
50V
D1
B340A
or
SS34
* C3 can be used to provide additional stability
and improved transient response.
Note: optimized for 5VOUT
R1
3.01k
C3*
optional
R2
R3
R4
R5
6.49k 2.94k 1.78k 976â¦
1
3
5
7
JP1a JP1b JP1c JP1d
1.8V 2.5V 3.3V 5.0V
2
4
6
8
Figure 6a. 4V - 30V Input Evaluation Board Schematic Diagram
C4
330 F
6.3V
J2
VOUT
2A
C5
0.1µF
50V
J4
GND
MIC4684
14
July 2001
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