MIC2178-3.3BWM(1999) View Datasheet(PDF) - Micrel
Part Name
Description
Manufacturer
MIC2178-3.3BWM Datasheet PDF : 16 Pages
| |||
MIC2178
Q1
SI9435
VIN
D
S
4.5V to 16.5V
C1
G 22µF
35V
R1
20k
Skip Mode
PWM Mode
U1
1,2,9
20 EN
VIN
3,8
SW
11 PWRGD
4–7
MIC2178 PGND
10 PWM
L1
50µH
D1
MBRS130L
VOUT
3.3V/1A
C2
100µF
10V
18 SYNC
COMP
13
R2
10k
C4
6.8nF
SGND
14–17
FB 12
U1
BIAS
C1
19
C2
C3
C3
0.01µF
C4
D1
Q1
L1
L1
L1
Micrel MIC2178-3.3BWM
AVX
TPSE226M035R0300, ESR = 0.3Ω
AVX
TPSD107M010R0100, ESR = 0.1Ω
Z5UorX7R Ceramic Dielectric Material
X7RorNP0 Ceramic Dielectric Material
Motorola MBRS130LT3
Siliconix Si9435DY PMOS
Coiltronics CTX50-4P, DCR = 0.097Ω
Coilcraft DO3316-473, DCR = 0.12Ω
Bi
HM77-11003, DCR = 0.073Ω
VIN
8V to 16.5V
Figure 6. MIC2178 Reversed Battery Protected Regulator
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
C6
6.8nF
14–17
19
C5
0.01µF
U1 Micrel MIC2178-5.0BWM
C1 AVX
TPSE226M035R0300, ESR = 0.3Ω
C2 AVX
TPSD107M010R0100, ESR = 0.1Ω
C3 AVX
TPSD107M010R0100, ESR = 0.1Ω
C4 AVX
TPSD107M010R0100, ESR = 0.1Ω
C5 Z5UorX7R Ceramic Dielectric Material
C6 X7RorNP0 Ceramic Dielectric Material
D1 Motorola MBRS130LT3
D2 Motorola MBRS130LT3
L1 Coiltronics CTX50-4P, DCR = 0.097Ω
D1
MBRS130L
T1
50µH
2
1
+VOUT/+IOUT
5V/0.5A
C2
100µF
10V
C4
100µF
10V
4
3
D2
MBRS130L
C2
100µF
10V
–VOUT/-IOUT
–5V/0.5A
+IOUT + (–IOUT ) 1A
DC = + VOUT
VIN
DC 40% then – IOUT
DC 40% then – IOUT
+ IOUT
+ IOUT
(1– DC)
Figure 7. MIC2178 8V–16.5V to ±5V/500mA Regulator
Micrel
MIC2178
14
June 1998
Share Link: 