MIC2178-5.0YWM View Datasheet(PDF) - Micrel
Part Name
Description
Manufacturer
MIC2178-5.0YWM Datasheet PDF : 15 Pages
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MIC2178
The feedback resistors, RC compensation network, and
BIAS pin bypass capacitor should be located close to their
respective pins. To prevent ground bounce, their ground
traces and SGND should not be in the path of switching
Micrel, Inc.
currents returning to the power supply ground bus. SGND
and PGND should be tied together by a ground plane that
extends under the MIC2178.
VIN
4.5V 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
50µH
D1
MBRS130L
VOUT
3.3V/1A
C2
100µF
10V
U1 Micrel MIC2178-3.3BWM
C1 AVX
TPSE226M035R0300, ESR = 0.3Ω
C2 AVX
TPSD107M010R0100, ESR = 0.1Ω
C3 Z5UorX7R Ceramic Dielectric Material
C4 X7RorNP0 Ceramic Dielectric Material
R3 D1 Motorola MBRS130LT3
10k L1 Coiltronics CTX50-4P, DCR = 0.097 Ω
L1 Coilcraft DO3316P-473, DCR = 0.12Ω
L1 Bi
HM77-11003, DCR = 0.073Ω
Figure 1. MIC2178 4.5V–16.5V to 3.3V/1A Regulator
VIN
5.4V to 16.5V
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
18 SYNC
FB 12
COMP SGND BIAS
13
R2
10k
C4
6.8nF
14–17
19
C3
0.01µF
L1
50µH
D1
MBRS130L
VOUT
5V/1A
C2
100µF
10V
U1 Micrel MIC2178-5.0BWM
C1 AVX
TPSE226M035R0300, ESR = 0.3Ω
C2 AVX
TPSD107M010R0100, ESR = 0.1Ω
C3 Z5UorX7R Ceramic Dielectric Material
C4 X7RorNP0 Ceramic Dielectric Material
R3 D1 Motorola MBRS130LT3
10k L1 Coiltronics CTX50-4P, DCR = 0.097 Ω
L1 Coilcraft DO3316P-473, DCR = 0.12Ω
L1 Bi
HM77-11003, DCR = 0.073Ω
Figure 2. MIC2178 5.4V–16.5V to 5V/1A Regulator
M9999-031805
12
March 2005
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