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MIC2178BWM Datasheet(PDF) 13 Page - Micrel Semiconductor

Part # MIC2178BWM
Description  2.5A Synchronous Buck Regulator
PDF  16 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2178BWM Datasheet(HTML) 13 Page - Micrel Semiconductor

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June 1998
13
MIC2178
MIC2178
Micrel
BIAS
SGND
PWRGD
COMP
PGND
FB
SW
VIN
C2
68µF
20V
VOUT
12V/1A
L1
68µH
C4
6.8nF
C3
0.01µF
MIC2178
PWM
Skip Mode
PWM Mode
SYNC
R2
174k
1%
R1
20k
1%
EN
R1
20k
R2
10k
VIN
12.5V to 16.5V
C1
22µF
35V
U1
20
11
10
18
13
14–17
19
12
4–7
3,8
1,2,9
D1
MBRS130L
U1 Micrel
MIC2178BWM
C1 AVX
TPSE226M035R0300, ESR = 0.3
Ω
C2 AVX
TPSE686M020R0150, ESR = 0.15
Ω
C3 Z5UorX7R Ceramic Dielectric Material
C4 X7RorNP0 Ceramic Dielectric Material
D1 Motorola
MBRS130LT3
L1
Coiltronics CTX68-4P, DCR = 0.238
Ω
L1
Coilcraft
DO3316P-683, DCR = 0.016
Ω
L1
Bi
HM77-11003, DCR = 0.233
Ω
Figure 3. MIC2178 12.5V–16.5V to 12V/1A Regulator
BIAS
SGND
PWRGD
COMP
PGND
FB
SW
VIN
C2
220µF
10V
X2
VOUT
3.3V/2.5A
L1
33µH
C4
6.8nF
C3
0.01µF
MIC2178
PWM
Skip Mode
PWM Mode
SYNC
EN
R1
20k
R2
10k
VIN
10V to 16.5V
C1
22µF
35V
X2
U1
20
11
10
18
13
14–17
19
12
4–7
3,8
1,2,9
D1
MBRS130L
U1 Micrel
MIC2178-3.3BWM
C1 AVX
TPSE226M035R0300, ESR = 0.3
Ω
C2 AVX
TPSE227M010R0100, ESR = 0.1
Ω
C3 Z5UorX7R Ceramic Dielectric Material
C4 X7RorNP0 Ceramic Dielectric Material
D1 Motorola
MBRS130LT3
L1
Bi
HM77-18004, DCR = 0.075
Ω
Figure 4. MIC2178 10V–16.5V to 3.3V/2.5A Regulator
BIAS
SGND
PWRGD
COMP
PGND
FB
SW
VIN
C2
100µF
10V
VOUT
3.3V/1A
L1
33µH
C4
6.8nF
C3
0.01µF
MIC2178
PWM
Skip Mode
PWM Mode
SYNC
EN
R1
20k
R2
10k
VIN
4.5V to 10V
C1
22µF
35V
U1
20
11
10
18
13
14–17
19
12
4–7
3,8
1,2,9
D1
MBRS130L
U1 Micrel
MIC2178-3.3BWM
C1 AVX
TPSE226M035R0300, ESR = 0.3
Ω
C2 AVX
TPSD107M010R0100, ESR = 0.1
Ω
C3 Z5UorX7R Ceramic Dielectric Material
C4 X7RorNP0 Ceramic Dielectric Material
D1 Motorola
MBRS130LT3
L1
Coiltronics CTX33-3P, DCR = 0.077
Ω
L1
Coilcraft
DO3316-333, DCR = 0.088
Ω
L1
Bi
HM77-60002, DCR = 0.035
Ω
Figure 5. MIC2178 4.5V–10V to 3.3V/1A Regulator



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