MIC2168 Datasheet, PDF (5/14 Pages) Micrel Semiconductor – 1MHZ PWM SYNCHRONOUS BUCK CONTROL IC

MIC2168
Typical Characteristics
V_IN = 5V
PWM Mode Supply Current
vs. Temperature
2.9
2.7
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
-40 -20 0 20 40 60 80 100120140
TEMPERATURE (°C)
0.820
V_FB vs. Temperature
0.815
0.810
0.805
0.800
0.795
0.790
0.785
0.780
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
V_DD Line Regulation
vs. Temperature
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Current Limit Foldback
4
3
2
1 _{Top MOSFET = Si4800}
R_CS = 1kΩ
0
0 2 4 6 8 10
I_LOAD (A)
November 2003
Micrel
PWM Mode Supply Current
vs. Supply Voltage
2.0
1.5
1.0
0.5
0
5
10
15
SUPPLY VOLTAGE (V)
V_DD Line Regulation
6
5
4
3
2
1
0
0
5
10
15
V_IN (V)
Oscillator Frequency
vs. Temperature
1200
1150
1100
1050
1000
950
900
850
800
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Overcurrent Trip Point
vs. Temperature
240
220
200
180
160
140
120
100
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
5
0.820
0.815
0.810
0.805
0.800
0.795
0.790
0.785
0.780
0
V_FB Line Regulation
5
10
15
V_IN (V)
V_DD Load Regulation
5.01
4.99
4.97
4.95
4.93
4.91
4.89
4.87
4.85
0
5 10 15 20 25 30
LOAD CURRENT (mA)
Oscillator Frequency
vs. Supply Voltage
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
0
5
10
15
SUPPLY VOLTAGE (V)
M9999-111803