MIC4684(2001) Ver la hoja de datos (PDF) - Micrel
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MIC4684 Datasheet PDF : 16 Pages
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MIC4684
Micrel
Recommended Components for a Given Output Voltage (Feed-Forward Configuration)
VIN = 4V to 16V (in feed-forward configuration)
VOUT IOUT R1
R2
5.0V 1.6A 3.01k 976kΩ
VIN
6.5V–16V
CIN
47µF, 20V
Vishay-Dale
595D476X0020D2T
3.3V 1.7A
3.01k 1.78k
4.85V–16V 47µF, 20V
Vishay-Dale
595D476X0020D2T
2.5V 1.8A 3.01k 2.94k
4.5V–16V 47µF, 20V
Vishay-Dale
595D476X0020D2T
1.8V 2A
3.01k 6.49k
4.2V–16V 47µF, 20V
Vishay-Dale
595D476X0020D2T
D1
D2
L1
2A, 30V 1A, 20V 27µH
Schottky Schottky Sumida
SS23 MBRX120 CDH74-270MC
2A, 30V 1A, 20V 27µH
Schottky Schottky Sumida
SS23 MBRX120 CDH74-270MC
2A, 30V 1A, 20V 27µH
Schottky Schottky Sumida
SS23 MBRX120 CDH74-270MC
2A, 30V 1A, 20V 27µH
Schottky Schottky Sumida
SS23 MBRX120 CDH74-270MC
Note 1. This bill of materials assumes the use of feedforward schotty diode from VIN to the bootstrap pin.
Table 1. Recommended Components for Common Ouput Voltages
(VIN = 4V to 16V)
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
D2
MBRX120
1A/20V
J1
VIN
4V to +16V
C1
15µF
35V
J3
GND
U1 MIC4684BM
3 VIN
SW 1
L1
47µH
C6
C2
0.1µF
BS 4
0.33µF
50V
ON
50V
8 EN
FB 5
OFF
D1
GND
B340A
SOP-8
2, 6, 7
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 976Ω
1
3
5
7
JP1a JP1b JP1c JP1d
1.8V 2.5V 3.3V 5.0V
2
4
6
8
Figure 6. 4V - 16V Input Evaluation Board Schematic Diagram
C4
330 F
6.3V
J2
VOUT
2A
C5
0.1µF
50V
J4
GND
MIC4684
12
July 2001
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