MIC2570_07 Datasheet, PDF (4/15 Pages) Micrel Semiconductor – Two-Cell Switching Regulator

MIC2570
Typical Characteristics
Switch Saturation Voltage
2.0
T_A = –40°C
1.5
1.0
V_IN= 3.0V 2.5V
0.5
1.5V
2.0V
0
0 0.2 0.4 0.6 0.8 1.0
SWITCH VOLTAGE (V)
Oscillator Frequency
vs. Temperature
30
V_IN = 2.5V
I_{S W} = 100mA
25
20
15
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Feedback Current
vs. Temperature
10
V_IN = 2.5V
8
MIC2570-1
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)
MIC2570
Switch Saturation Voltage
2.0
T_A = 25°C
1.5
V_IN = 3.0V
2.5V
1.0
2.0V
1.5V
0.5
0
0 0.2 0.4 0.6 0.8 1.0
SWITCH VOLTAGE (V)
Oscillator Duty Cycle
vs. Temperature
75
V_IN = 2.5V
70 ^I_{S W} ^{= 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 MIC2570-2
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, Inc.
Switch Saturation Voltage
2.0
T_A = 85°C
1.5
V_IN = 3.0V
1.5V
1.0
0.5
0
0 0.2 0.4 0.6 0.8 1.0
SWITCH VOLTAGE (V)
Quiescent Current
vs. Temperature
200
V_IN = 2.5V
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
2.85V
25
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
August 2007