MIC4576_06 Datasheet, PDF (7/8 Pages) Micrel Semiconductor – 200kHz Simple 3A Buck Regulator

MIC4576
Micrel, Inc.
8V to 24V
C1
470µF
35V
5 _SHDN
SW ²
MIC4576-5.0BT
1 _VIN
FB ⁴
GND
3
L1
33µH
D1
1N5822
5V/3A
C2
1000µF
16V
C1 Nichicon
C2 Nichicon
D1 Motorola
L1 Coiltronics
L1 Bi
UPL1J471MPH, ESR = 0.046Ω
UPL1C102MPH, ESR = 0.047Ω
MBR5822
PL52C-33-1000, DCR = 0.036
HM77-30004, DCR = 0.045Ω, Note 2
Figure 3. 8V–24V to 5V/3A Buck Converter
Through Hole
8V to 36V
C1
470µF
63V
5 _SHDN
SW ²
MIC4576-5.0BT
1 _VIN
FB ⁴
GND
3
L1
33µH
D1
MBR360
5V/3A
C2
1000µF
16V
C1 Nichicon UPL1J471MRH, ESR = 0.039Ω
C2 Nichicon UPL1C102MPH, ESR = 0.047Ω
D1 Motorola MBR360
L1 Coiltronics PLS2C-33-1000, DCR = 0.036
L1 Bi
HM77-30004, DCR = 0.045Ω, Note 2
Figure 4. 8V–36V to 5V/3A Buck Converter
Through Hole
16V to 36V
C1
470µF
63V
5 _SHDN
SW ²
1
MIC4576BT
V_IN
FB
4
GND
3
L1
68µH
MBR360
12V/3A
R2
13.0k
1%
R1
1.50k
1%
C2
1000µF
16V
C1 Nichicon
C2 Nichicon
D1 Motorola
L1 Bi
UPL1J471MPH, ESR = 0.039Ω
UPL1C102MPH, ESR = 0.047Ω
MBR360
HM77-29006, DCR = 0.08Ω
Figure 5. 16V–36V to 12V/3A Buck Converter
Through Hole
V_IN
8V to 36V
U1
5 _SHDN
SW ²
MIC4576-5.0BT
1 _VIN
FB ⁴
GND
3
C1
470µF
63V
C3
470µF
63V
U2
5 _SHDN
4
FB
MIC4576-5.0BT
1 _VIN
SW ²
GND
3
L1
33µH
R1
0.1Ω
D1
MBR360
R3
10K
C5
0.01µF
V_OUT
5V/4A
C2
1000µF
16V
V_IN
8
1
4
2
U3
LM358
3
L2
33µH
D2
MBR360
R2
0.1Ω
C4
1000µF
16V
C1, C3
C2, C4
D1, D2
L1, L2
R1, R2
U3
Nichicon UPL1J471MRH, ESR = 0.039Ω
Nichicon UPL1C102MPH, ESR = 0.047Ω
Motorola MBR360
Coiltronics PL52C-33-1000, DCR = 0.036
KRL
SP-1-A1-0R100J
National LM358
Figure 6. Parallel Switching Regulators
Note 2: Surface-mount component.
March 2006
7
MIC4576