MIC2177-3.3BWM Micrel Inc, MIC2177-3.3BWM Datasheet - Page 7

• Manufacturer Part Number: MIC2177-3.3BWM
• Description: IC REG SYNCBUCK 2.5A 3.3V 20SOIC
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of MIC2177-3.3BWM

• 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: -

Functional Diagram
Micrel, Inc.
April 2008
10k
Auto-Mode
Shutdown
Enable
PWM
0.01µF
2.2nF
C
R
C
COMP
SYNC
AUTO
C
BIAS
EN
20
19
18
11
13
MIC2177 [Adjustable]
Shutdown
Regulator
Oscillator
Thermal
200kHz
internal
supply
voltage
UVLO,
3.3V
RESET PULSE
Select Logic
Skip-Mode
PWM/
Q
R
S
CORRECTIVE RAMP
3.3V
10µA
Control
Output
Logic
Comp.
PWM
Comp.
Comp.
I
I
LIMIT
MIN
7
Low Output
Comp.
Skip-Mode
Comp.
SGND
Thrshld.
Amp.
I
Error
14
Amp.
I
SENSE
MIN
15
16
17
P-channel
N-channel
40mV
V
1.245V
VIN
100m
100m
REF
4.5V to 16.5V
1
2
V
IN
9
SW
3
8
PGND
4
5
6
7
10
12
OUT
FB
C
IN
V
Bold lines indicate
high current traces
OUT
D
= 1.245
L1
C
OUT
(
R2
R1
M9999-042108
R1
R2
+ 1
MIC2177
)
V
OUT