MIC2178-3.3BWM Micrel Inc, MIC2178-3.3BWM Datasheet - Page 9

• 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: -

PWM-Mode Functional Diagram
March 2005
MIC2178
Stop
C
C
COMP
SYNC
R
C
18
13
MIC2178 [Adjustable] PWM-Mode Signal Path
Oscillator
200kHz
V
Reset
Pulse
I
Error Amp.
Output
I
L1
SENSE
SW
I
LOAD
Corrective
Ramp
Reset
Pulse
Q
R
S
Comp.
PWM
SGND
V
REF
Amp.
Error
14
9
1.245V
15
16
17
I
Amp.
SENSE
VIN
P-channel
N-channel
100mΩ
100mΩ
4.5V to 16.5V
1
2
V
IN
9
∆I
L1
SW
3
8
PGND
4
5
6
7
FB
12
C
IN
V
OUT
D
L1
I
L1
1.245
C
OUT
R2
R1
M9999-031805
R1
R2
Micrel, Inc.
1
V
OUT