MIC2571_02 Datasheet, PDF (4/12 Pages) Micrel Semiconductor – Single-Cell Switching Regulator

MIC2571
Typical Characteristics
Switch Saturation Voltage
1.0
T_A = –40°C
0.8
0.6
0.4
0.2
0
0
1.4V
1.3V
1.2V
1.1V
V_IN = 1.0V
0.2 0.4 0.6 0.8 1.0
SWITCH VOLTAGE (V)
Oscillator Frequency
vs. Temperature
30
V_IN = 1.5V
I_SW = 100mA
25
20
15
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Feedback Current
vs. Temperature
10
V_IN = 1.5V
8
MIC2571-1
6
4
2
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Output Current Limit
vs. Temperature
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC2571
Switch Saturation Voltage
1.0
1.4V
1.3V
0.8
T_A = 25°C
0.6
1.2V
1.1V
0.4
1.0V
0.2
0
0
V_IN = 0.9V
0.2 0.4 0.6 0.8 1.0
SWITCH VOLTAGE (V)
Oscillator Duty Cycle
vs. Temperature
75
V_IN = 1.5V
70 ^ISW ^{= 100mA}
65
60
55
50
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Feedback Current
vs. Temperature
50
V_IN = 2.5V
40 MIC2571-2
30
20
10
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Switch Leakage Current
vs. Temperature
1000
100
10
1
0.1
0.01
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
4
Micrel
Switch Saturation Voltage
1.0
1.4V 1.3V
0.8 T_A = 85°C
1.2V
1.1V
0.6
1.0V
0.4
V_IN = 0.9V
0.2
0
0 0.2 0.4 0.6 0.8 1.0
SWITCH VOLTAGE (V)
Quiescent Current
vs. Temperature
200
V_IN = 1.5V
175
150
125
100
75
50
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
200
175
150
125
100
75
50
25
0
0
Quiescent Current
vs. Supply Voltage
–40°C
+25°C
+85°C
2 4 6 8 10
SUPPLY VOLTAGE (V)
Output Hysteresis
vs. Temperature
150
5V
125
100
3.3V
75
50
V_OUT = 2.85V
25
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
1997