MIC2178-5.0BWM(1999) 데이터 시트보기 (PDF) - Micrel
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MIC2178-5.0BWM Datasheet PDF : 16 Pages
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MIC2178
Micrel
VIN
12.5V to 16.5V
C1
22µF
35V
R1
20k
Skip Mode
PWM Mode
U1
1,2,9
VIN
20 EN
3,8
SW
11 PWRGD
4–7
10
MIC2178
PWM
PGND
18 SYNC
FB 12
COMP SGND BIAS
13
R2
10k
C4
6.8nF
14–17
19
C3
0.01µF
L1
68µH
D1
MBRS130L
R2
174k
1%
VOUT
12V/1A
C2
68µF
20V
U1 Micrel MIC2178BWM
C1 AVX
TPSE226M035R0300, ESR = 0.3Ω
R1 C2 AVX
TPSE686M020R0150, ESR = 0.15Ω
20k C3 Z5UorX7R Ceramic Dielectric Material
1% C4 X7RorNP0 Ceramic Dielectric Material
D1 Motorola MBRS130LT3
L1 Coiltronics CTX68-4P, DCR = 0.238Ω
L1 Coilcraft DO3316P-683, DCR = 0.016Ω
L1 Bi
HM77-11003, DCR = 0.233Ω
Figure 3. MIC2178 12.5V–16.5V to 12V/1A Regulator
VIN
10V to 16.5V
C1
22µF
35V
X2
R1
20k
Skip Mode
PWM Mode
U1
1,2,9
VIN
20 EN
3,8
SW
11 PWRGD
4–7
10
MIC2178
PWM
PGND
L1
33µH
D1
MBRS130L
VOUT
3.3V/2.5A
C2
220µF
10V
18 SYNC
FB 12
X2
COMP SGND BIAS
U1 Micrel
C1 AVX
MIC2178-3.3BWM
TPSE226M035R0300, ESR = 0.3Ω
13
R2
10k
14–17
19
C2 AVX
TPSE227M010R0100, ESR = 0.1Ω
C3 Z5UorX7R Ceramic Dielectric Material
C3 C4 X7RorNP0 Ceramic Dielectric Material
C4
6.8nF
0.01µF D1 Motorola MBRS130LT3
L1 Bi
HM77-18004, DCR = 0.075Ω
Figure 4. MIC2178 10V–16.5V to 3.3V/2.5A Regulator
VIN
4.5V to 10V
C1
22µF
35V
R1
20k
Skip Mode
PWM Mode
U1
1,2,9
20 EN
VIN
3,8
SW
11 PWRGD
4–7
10
MIC2178
PWM
PGND
L1
33µH
D1
MBRS130L
VOUT
3.3V/1A
C2
100µF
10V
18 SYNC
FB 12
COMP SGND BIAS
U1 Micrel
C1 AVX
MIC2178-3.3BWM
TPSE226M035R0300, ESR = 0.3Ω
13
R2
14–17
19
C2 AVX
TPSD107M010R0100, ESR = 0.1Ω
C3 Z5UorX7R Ceramic Dielectric Material
10k
C3
C4 X7RorNP0 Ceramic Dielectric Material
C4
6.8nF
0.01µF D1 Motorola MBRS130LT3
L1 Coiltronics CTX33-3P, DCR = 0.077Ω
L1 Coilcraft DO3316-333, DCR = 0.088Ω
L1 Bi
HM77-60002, DCR = 0.035Ω
Figure 5. MIC2178 4.5V–10V to 3.3V/1A Regulator
June 1998
13
MIC2178
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