mic4684 Micrel Semiconductor, mic4684 Datasheet - Page 14

• Manufacturer Part Number: mic4684
• Description: Mic4684 2a High-efficiency Buck Regulator
• Manufacturer: Micrel Semiconductor

V
MIC4684
Recommended Components for a Given Output Voltage (Standard Configuration)
M9999-021705
IN
V
5.0V
3.3V
2.5V
1.8V
OUT
= 4V to 30V
1.7A
1.5A
1.5A
1.5A
I
(34V transient)
OUT
4V to +30V
GND
V
J1
J3
15µF
IN
35V
3.01k
3.01k
3.01k
3.01k
C1
R1
* C3 can be used to provide additional stability
and improved transient response.
Note: optimized for 5V
976kΩ
1.78k
2.94k
6.49k
OFF
ON
Table 2. Recommended Components for Common Ouput Voltages
R2
Figure 8. 4V - 30V Input Evaluation Board Schematic Diagram
0.1µF
50V
6.5V–23V
C2
8V–30V
7V–28V
6V–17V
V
IN
OUT
3
8
SOP-8
VIN
EN
U1 MIC4684BM
GND
C
33µF, 35V
Vishay-Dale
595D336X0035R2T
33µF, 35V
Vishay-Dale
595D336X0035R2T
33µF, 35V
Vishay-Dale
595D336X0035R2T
47µF, 25V
Vishay-Dale
595D476X0025D2T
IN
2, 6, 7
SW
BS
FB
(V
1
4
5
IN
= 4V to 30V)
D1
B340A
or
SS34
14
C6
0.33µF
50V
47µH
L1
D1
3A, 40V
Schotty
SS34
3A, 40V
Schotty
SS34
3A, 40V
Schotty
SS334
3A, 40V
Schotty
SS334
1
2
R1
3.01k
R2
6.49k
JP1a
1.8V
3
4
L1
68µH
Sumida
CDRH104R-680MC
68µH
Sumida
CDRH104R-680MC
68µH
Sumida
CDRH104R-680MC
68µH
Sumida
CDRH104R-680MC
R3
2.94k
JP1b
2.5V
C3*
optional
5
6
R4
1.78k
JP1c
3.3V
7
8
R5
976Ω
JP1d
5.0V
C
120µF, 6.3V
Vishay-Dale
594D127X06R3C2T
220µF, 6.3V
Vishay-Dale
594D227X06R3C2T
330µF, 6.3V
Vishay-Dale
594D337X06R3D2T
330µF, 6.3V
Vishay-Dale
594D337X06R3D2T
C4
330µF
6.3V
OUT
February 2005
V
GND
C5
0.1µF
50V
2A
J2
J4
OUT
Micrel, Inc