MIC4575_09 Datasheet, PDF (6/15 Pages) Micrel Semiconductor – 200kHz Simple 1A Buck Regulator

Micrel, Inc.
Application Information
The applications circuits that follow have been
constructed and tested. Refer to Application Note 15 for
additional information, including efficiency graphs and
manufacturer’s addresses and telephone numbers for
most circuits.
For a mathematical approach to component selection
and circuit design, refer to Application Note 14.
MIC4575
Figure 4. 6V–24V to 3.3V/1A Buck Converter
Low-Profile Surface Mount
Figure 1. 6V–24V to 3.3V/1A Buck Converter
Through Hole
Figure 5. 8V–24V to 5V/1A Buck Converter
Low-Profile Surface Mount
Figure 2. 8V–24V to 5V/1A Buck Converter
Through Hole
16V to 24V
C1
68µF
63V
5
SHDN
2
SW
MIC4575BT
1 _VIN
4
FB
GND
3
L1
150µH
MBR160
12V/1A
R2
13.0k
1%
R1
1.50k
1%
C2
330µF
16V
C1 Nichicon
C2 Nichicon
D1 Motorola
L1 Sumida
MBR160
Figure 3. 16V–24V to 12V/1A Buck Converter
Through Hole
Note 2: Surface-mount component.
Figure 6. 16V–24V to 12V/1A Buck Converter
Low-Profile Surface Mount
Figure 7. 6V–24V to 3.3V/1A Buck Converter
Lower-Cost Surface Mount
July 2009
6
M9999-072909