MIC2178-3.3BWM Micrel Inc, MIC2178-3.3BWM Datasheet - Page 13

• Manufacturer Part Number: MIC2178-3.3BWM
• Description: IC REG SYNCBCK 2.5A 3.3V 20SOIC
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of MIC2178-3.3BWM

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 3.3V
• Current - Output: 2.5A
• Frequency - Switching: 200kHz
• Voltage - Input: 4.5 ~ 16.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

March 2005
MIC2178
12.5V to 16.5V
V
22µF
35V
4.5V to 10V
IN
C1
PWM Mode
10V to 16.5V
Skip Mode
22µF
V
35V
PWM Mode
IN
22µF
C1
Skip Mode
V
35V
PWM Mode
IN
C1
X2
Skip Mode
R1
20k
R1
20k
6.8nF
R1
20k
10
20
11
18
Figure 4. MIC2178 10V–16.5V to 3.3V/2.5A Regulator
C4
Figure 3. MIC2178 12.5V–16.5V to 12V/1A Regulator
10k
R2
6.8nF
Figure 5. MIC2178 4.5V–10V to 3.3V/1A Regulator
U1
EN
PWRGD
PWM
SYNC
COMP
10
20
11
18
6.8nF
C4
10k
13
R2
10
U1
20
11
18
EN
PWRGD
PWM
SYNC
C4
10k
COMP
R2
MIC2178
U1
EN
PWRGD
PWM
SYNC
COMP
13
SGND
VIN
13
MIC2178
1,2,9
14–17
SGND
MIC2178
VIN
SGND
PGND
VIN
1,2,9
14–17
BIAS
1,2,9
14–17
SW
FB
19
PGND
BIAS
C3
0.01µF
PGND
SW
12
3,8
4–7
FB
BIAS
19
SW
FB
C3
0.01µF
19
3,8
4–7
12
C3
0.01µF
3,8
4–7
12
D1
MBRS130L
R3
10k
13
68µH
D1
MBRS130L
L1
R3
10k
D1
MBRS130L
33µH
R3
10k
L1
33µH
L1
U1 Micrel
C1 AVX
C2 AVX
C3 Z5UorX7R Ceramic Dielectric Material
C4 X7RorNP0 Ceramic Dielectric Material
D1 Motorola
L1 Bi
R2
174k
1%
R1
20k
1%
U1 Micrel
C1 AVX
C2 AVX
C3 Z5UorX7R Ceramic Dielectric Material
C4 X7RorNP0 Ceramic Dielectric Material
D1 Motorola
L1 Coiltronics CTX33-3P, DCR = 0.077 Ω
L1 Coilcraft
L1 Bi
U1 Micrel
C1 AVX
C2 AVX
C3 Z5UorX7R Ceramic Dielectric Material
C4 X7RorNP0 Ceramic Dielectric Material
D1 Motorola
L1 Coiltronics CTX68-4P, DCR = 0.238 Ω
L1 Coilcraft
L1 Bi
C2
68µF
20V
MIC2178-3.3BWM
TPSE226M035R0300, ESR = 0.3Ω
TPSE227M010R0100, ESR = 0.1Ω
MBRS130LT3
HM77-18004, DCR = 0.075Ω
MIC2178-3.3BWM
TPSE226M035R0300, ESR = 0.3Ω
TPSD107M010R0100, ESR = 0.1Ω
MBRS130LT3
DO3316-333, DCR = 0.088Ω
HM77-60002, DCR = 0.035Ω
V
12V/1A
C2
100µF
10V
OUT
MIC2178BWM
TPSE226M035R0300, ESR = 0.3Ω
TPSE686M020R0150, ESR = 0.15Ω
MBRS130LT3
DO3316P-683, DCR = 0.016Ω
HM77-11003, DCR = 0.233Ω
V
3.3V/1A
OUT
C2
220µF
10V
X2
V
3.3V/2.5A
OUT
M9999-031805
Micrel, Inc.