MIC2177BWM Micrel Inc, MIC2177BWM Datasheet - Page 12

• 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: -

Skip-Mode Functional Diagram
Micrel, Inc.
April 2008
MIC2177 [Adjustable] Skip-Mode Signal Pat
Output Control Logic
I
V
One-Shot
Pulse
V
L 1
V
V
S W
F B
R E F
R E F
+ 5mV
– 5mV
V
I
O U T
V
LIM
IN
0
0
Shot
One
Comp.
S G N D
I
Thresh.
Voltage
LIMIT
Skip-Mode
Comp.
I
LIMIT
V
S
R
R E F
14
Q
1.245V
15
16
17
12
I
Amp.
S E N S E
P-channel
VIN
100m
4.5V to 16.5V
1
2
V
IN
9
S W
3
8
P GND
4
5
6
7
F B
12
C
IN
V
OUT
D
= 1.245
L1
I
L1
C
O U T
(
R2
R1
R 1
R 2
+ 1
V
)
O U T
M9999-042108
MIC2177