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MIC2178BWM Datasheet(PDF) 14 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) 14 Page - Micrel Semiconductor

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MIC2178
Micrel
MIC2178
14
June 1998
BIAS
SGND
PWRGD
COMP
PGND
FB
SW
VIN
C2
100µF
10V
VOUT
3.3V/1A
L1
50µH
C4
6.8nF
C3
0.01µF
MIC2178
PWM
Skip Mode
PWM Mode
SYNC
EN
R1
20k
R2
10k
VIN
4.5V 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
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
Q1 Siliconix
Si9435DY PMOS
L1
Coiltronics CTX50-4P, DCR = 0.097
Ω
L1
Coilcraft
DO3316-473, DCR = 0.12
Ω
L1
Bi
HM77-11003, DCR = 0.073
Ω
G
Q1
SI9435
S
D
Figure 6. MIC2178 Reversed Battery Protected Regulator
BIAS
SGND
PWRGD
COMP
PGND
FB
SW
VIN
C2
100µF
10V
+VOUT/+IOUT
5V/0.5A
C6
6.8nF
C5
0.01µF
MIC2178
PWM
Skip Mode
PWM Mode
SYNC
EN
R1
20k
R2
10k
VIN
8V 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
MIC2178-5.0BWM
C1 AVX
TPSE226M035R0300, ESR = 0.3
Ω
C2 AVX
TPSD107M010R0100, ESR = 0.1
Ω
C3 AVX
TPSD107M010R0100, ESR = 0.1
Ω
C4 AVX
TPSD107M010R0100, ESR = 0.1
Ω
C5 Z5UorX7R Ceramic Dielectric Material
C6 X7RorNP0 Ceramic Dielectric Material
D1 Motorola
MBRS130LT3
D2 Motorola
MBRS130LT3
L1
Coiltronics CTX50-4P, DCR = 0.097
Ω
C4
100µF
10V
T1
50µH
2
1
4
3
D2
MBRS130L
C2
100µF
10V
–VOUT/-IOUT
–5V/0.5A
+IOUT + (–IOUT)
1A
DC = +
V
OUT
VIN
DC
40% then – IOUT
+IOUT
DC
40% then – IOUT
+IOUT
(1– DC)
Figure 7. MIC2178 8V–16.5V to
±5V/500mA Regulator



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