MIC2179-3.3YSM Micrel Inc, MIC2179-3.3YSM Datasheet - Page 3

• 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

Absolute Maximum Ratings
Supply Voltage [100ms transient] (V
Output Switch Voltage (V
Output Switch Current (I
Enable, PWM Control Voltage (V
Sync Voltage (V
Electrical Characteristics
V
Symbol
I
V
V
V
V
V
I
A
f
D
t
I
I
R
I
June 2009
SS
FB
O
ON min
SYNC
LIM
SW
VOL
IN
BIAS
FB
OUT
TH
TL
MAX
ON
= 7.0V; T
A
= 25°C, bold indicates –40°C ≤ T
Parameter
Input Supply Current
Bias Regulator Output Voltage
Feedback Voltage
Output Voltage
Undervoltage Lockout
Feedback Bias Current
Error Amplifier Gain
Error Amplifier Output Swing
Error Amplifier Output Current
Oscillator Frequency
Maximum Duty Cycle
Minimum On-Time
SYNC Frequency Range
SYNC Threshold
SYNC Minimum Pulse Width
SYNC Leakage
Current Limit
Switch On-Resistance
Output Switch Leakage
SYNC
) ...................................................... 6V
SW
SW
) ......................................... 6.0A
)
...................................................
EN
(3)
, V
IN
) ......................... 18V
PWM
(1)
) .................. 18V
A
≤ 85°C; unless noted.
Condition
PWM mode, output not switching,
4.5V ≤ V
skip mode, output not switching,
4.5V ≤ V
V
V
MIC2179 [adj.]: V
MIC2179 [adj.]: V
5V ≤ V
MIC2179-5.0: I
MIC2179-5.0:
6V ≤ V
MIC2179-3.3: I
MIC2179-3.3:
5V ≤ V
upper threshold
lower threshold
MIC2179 [adj.]
MIC2179-5.0, MIC2179-3.3
0.6V ≤ V
upper limit
lower limit
source and sink
V
V
V
PWM mode, V
skip mode
high-side switch, V
low-side switch, V
V
EN
IN
FB
FB
SYNC
SW
= 16.5V
= 1.0V
= 1.5V
= 0V, 4.5V ≤ V
= 16.5V
18V
IN
IN
IN
= 0V to 5.5V
IN
IN
COMP
≤ 16V, 10mA ≤ I
≤ 16V, 10mA ≤ I
≤ 16V, 10mA ≤ I
≤ 16.5V
≤ 16.5V
3
IN
≤ 0.8V
LOAD
LOAD
Operating Ratings
Supply Voltage (V
Junction Temperature Range (T
= 12V
OUT
OUT
IN
IN
IN
= 0
= 0
= 12V
= 12V
≤ 16.5V
= 3.3V, I
= 3.3V,
LOAD
LOAD
LOAD
LOAD
≤ 1A
≤ 1A
≤ 1A
= 0
IN
) .......................................4.5V to 16.5V
(2)
3.10
1.22
3.20
3.14
4.85
4.85
4.75
3.20
3.20
3.14
3.90
Min
160
100
220
500
0.9
0.8
3.4
15
15
–1
J
) ............ –40°C to +125°C
1.245
3.30
4.25
4.15
0.05
0.01
Typ
600
200
300
600
160
140
1.0
3.3
5.0
5.0
3.3
3.3
1.5
1.6
4.3
60
20
18
25
1
1
M9999-063009
Max
1.27
3.40
3.46
5.15
5.15
5.25
3.40
3.40
3.46
4.35
750
150
240
400
300
350
350
1.5
3.4
0.1
2.2
5.5
25
40
20
35
10
1
Units
kHz
kHz
mΩ
mΩ
mA
mA
µA
µA
nA
µA
µA
µA
µA
ns
ns
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V
A