MIC2179 데이터 시트보기 (PDF) - Micrel
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MIC2179 Datasheet PDF : 13 Pages
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Micrel, Inc.
Absolute Maximum Ratings(1)
Supply Voltage [100ms transient] (VIN).......................... 18V
Output Switch Voltage (VSW).................................................... 18V
Output Switch Current (ISW).......................................... 6.0A
Enable, PWM Control Voltage (VEN, VPWM).................. 18V
Sync Voltage (VSYNC)...................................................... 6V
MIC2179
Operating Ratings(2)
Supply Voltage (VIN).......................................4.5V to 16.5V
Junction Temperature Range (TJ)............. –40°C to +125°C
Electrical Characteristics(3)
VIN = 7.0V; TA = 25°C, bold indicates –40°C ≤ TA ≤ 85°C; unless noted.
Symbol
Parameter
Condition
Min Typ Max
ISS
Input Supply Current
VBIAS
Bias Regulator Output Voltage
VFB
Feedback Voltage
VOUT
Output Voltage
VTH
Undervoltage Lockout
VTL
IFB
Feedback Bias Current
PWM mode, output not switching,
1.0
4.5V ≤ VIN ≤ 16.5V
skip mode, output not switching,
600
4.5V ≤ VIN ≤ 16.5V
VEN = 0V, 4.5V ≤ VIN ≤ 16.5V
1
VIN = 16.5V
3.10 3.30
MIC2179 [adj.]: VOUT = 3.3V, ILOAD = 0
1.22 1.245
MIC2179 [adj.]: VOUT = 3.3V,
5V ≤ VIN ≤ 16V, 10mA ≤ ILOAD ≤ 1A
3.20 3.3
3.14
MIC2179-5.0: ILOAD = 0
4.85 5.0
MIC2179-5.0:
4.85 5.0
6V ≤ VIN ≤ 16V, 10mA ≤ ILOAD ≤ 1A
4.75
MIC2179-3.3: ILOAD = 0
3.20 3.3
MIC2179-3.3:
3.20 3.3
5V ≤ VIN ≤ 16V, 10mA ≤ ILOAD ≤ 1A
3.14
upper threshold
4.25
1.5
750
25
3.4
1.27
3.40
3.46
5.15
5.15
5.25
3.40
3.40
3.46
4.35
lower threshold
3.90 4.15
MIC2179 [adj.]
60
150
MIC2179-5.0, MIC2179-3.3
20
40
AVOL
Error Amplifier Gain
Error Amplifier Output Swing
0.6V ≤ VCOMP ≤ 0.8V
upper limit
15
18
20
0.9
1.5
lower limit
0.05 0.1
Error Amplifier Output Current
source and sink
15
25
35
fO
DMAX
tON min
Oscillator Frequency
160 200 240
Maximum Duty Cycle
VFB = 1.0V
100
Minimum On-Time
VFB = 1.5V
300 400
SYNC Frequency Range
220
300
SYNC Threshold
0.8
1.6
2.2
SYNC Minimum Pulse Width
500
ISYNC
SYNC Leakage
ILIM
Current Limit
VSYNC = 0V to 5.5V
–1
PWM mode, VIN = 12V
3.4
skip mode
0.01
1
4.3
5.5
600
RON
Switch On-Resistance
ISW
Output Switch Leakage
high-side switch, VIN = 12V
low-side switch, VIN = 12V
VSW = 16.5V
160 350
140 350
1
10
Units
mA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
nA
µA
V
V
µA
kHz
%
ns
kHz
V
ns
µA
A
mA
mΩ
mΩ
µA
June 2009
3
M9999-063009
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