MIC2177BWM Micrel Inc, MIC2177BWM Datasheet - Page 11

• Manufacturer Part Number: MIC2177BWM
• Description: IC REG SW SYNC BUCK 2.5A 20SOIC
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of MIC2177BWM

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 16.5 V
• 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: Lead free / RoHS Compliant
• Power - Output: -

PWM-Mode Functional Diagram
Micrel, Inc.
April 2008
Stop
C
C
C O M P
S Y N C
R
C
18
13
MIC2177 [Adjustable] PWM-Mode Signal Path
Oscillator
200kHz
I
I
V
Reset
Pulse
Error Amp.
Output
L 1
S E N S E
S W
Corrective
Ram p
Reset
Pulse
I
LOAD
Q
R
S
Comp.
PWM
S G N D
V
R E F
Amp.
Error
14
1.245V
15 16
11
17
I
Amp.
S E N S E
P-channel
N-channel
VIN
100m
100m
4.5V to 16.5V
1
2
V
IN
9
S W
3
8
P GND
4
5
6
7
F B
12
I
C
L1
IN
V
OUT
D
= 1.245
L1
I
L1
C
OU T
(
R2
R1
+ 1
R 1
R 2
M9999-042108
)
V
MIC2177
O U T