MIC2179-3.3YSM Micrel Inc, MIC2179-3.3YSM Datasheet - Page 10

• Manufacturer Part Number: MIC2179-3.3YSM
• Description: IC,SMPS CONTROLLER,CURRENT-MODE,SSOP,20PIN,PLASTIC
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of MIC2179-3.3YSM

• Lead Free Status: Lead free
• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 3.3V
• Current - Output: 1.5A
• Frequency - Switching: 200kHz
• Voltage - Input: 4.5 ~ 16.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP
• Power - Output: -
• Other names: 576-1711-5; MIC2179-3.3YSM

Skip-Mode Functional Diagram
June 2009
MIC2179 [Adjustable] Skip-Mode Signal Path
Output Control Logic
V
One-Shot
Pulse
I
V
L 1
V
V
S W
F B
R E F
R E F
+ 5mV
– 5mV
V
OU T
I
V
LIM
IN
0
0
Shot
One
S G N D
Comp.
I
Thresh .
Voltage
LIMIT
Skip-Mode
Comp.
I
LIMIT
V
S
R
R E F
9
Q
1.245V
10
11
12
10
I
Amp.
S E N S E
P-channel
110mΩ
VIN
4.5V to 16.5V
16
V
IN
17
S W
3
P GND
1
2
19
20
7
F B
C
IN
V
OUT
D
= 1.245
L1
I
L1
C
OU T
(
R1
R2
+ 1
R 1
R 2
)
V
OU T
M9999-063009