MIC2178-5.0BWM Micrel Inc, MIC2178-5.0BWM Datasheet - Page 14

• Manufacturer Part Number: MIC2178-5.0BWM
• Description: IC REG SYNCBCK 2.5A 5.0V 20SOIC
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of MIC2178-5.0BWM

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 5V
• 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: -

MIC2178
M9999-031805
4.5V to 16.5V
V
IN
8V to 16.5V
22µF
V
U1 Micrel
C1 AVX
C2 AVX
C3 AVX
C4 AVX
C5 Z5UorX7R Ceramic Dielectric Material
C6 X7RorNP0 Ceramic Dielectric Material
D1 Motorola
D2 Motorola
L1 Coiltronics CTX50-4P, DCR = 0.097 Ω
35V
D
PWM Mode
C1
IN
Skip Mode
SI9435
Q1
G
22µF
35V
S
PWM Mode
C1
Skip Mode
R1
20k
Figure 6. MIC2178 Reversed Battery Protected Regulator
MIC2178-5.0BWM
TPSE226M035R0300, ESR = 0.3Ω
TPSD107M010R0100, ESR = 0.1Ω
TPSD107M010R0100, ESR = 0.1Ω
TPSD107M010R0100, ESR = 0.1Ω
MBRS130LT3
MBRS130LT3
Figure 7. MIC2178 8V–16.5V to
6.8nF
10
20
11
18
C6
10k
R2
R1
20k
U1
EN
PWRGD
PWM
SYNC
COMP
13
6.8nF
MIC2178
10
20
11
18
C4
10k
SGND
R2
U1
EN
PWRGD
PWM
SYNC
VIN
COMP
1,2,9
14–17
13
MIC2178
PGND
BIAS
SGND
SW
VIN
FB
19
1,2,9
14–17
C5
0.01µF
3,8
4–7
12
PGND
BIAS
SW
FB
19
14
D1
MBRS130L
C3
0.01µF
R3
10k
3,8
4–7
12
100µF
10V
+I
DC = +
DC
DC
C4
±
OUT
D1
MBRS130L
5V/500mA Regulator
C3
0.01µF
50µH
L1
40% then – I
40% then – I
+ (–I
V
V
OUT
OUT
U1 Micrel
C1 AVX
C2 AVX
C3 Z5UorX7R Ceramic Dielectric Material
C4 X7RorNP0 Ceramic Dielectric Material
D1 Motorola
Q1 Siliconix
L1 Coiltronics CTX50-4P, DCR = 0.097 Ω
L1 Coilcraft
L1 Bi
3
IN
4
2
50µH
T1
)
MBRS130L
OUT
OUT
1A
1
D2
MIC2178-3.3BWM
TPSE226M035R0300, ESR = 0.3Ω
TPSD107M010R0100, ESR = 0.1Ω
HM77-11003, DCR = 0.073Ω
MBRS130LT3
Si9435DY PMOS
DO3316-473, DCR = 0.12Ω
+ I
+ I
OUT
OUT
C2
100µF
10V
C2
100µF
10V
C2
100µF
10V
(1– DC)
V
3.3V/1A
OUT
–V
+V
–5V/0.5A
5V/0.5A
OUT
OUT
/-I
/ +I
OUT
OUT
March 2005
Micrel, Inc.