MIC22705_11 Datasheet, PDF (6/29 Pages) Micrel Semiconductor – 1MHz, 7A Integrated Switch High-Efficiency Synchronous Buck Regulator

Micrel, Inc.
Typical Characteristics
VIN Operating Supply Current
vs. Input Voltage
20
15
10
5
VOUT = 1.8V
IOUT = 0A
SWITCHING
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
1.0%
0.8%
0.6%
Load Regulation
vs. Input Voltage
VOUT = 1.8V
IOUT = 0A to 7A
0.4%
0.2%
0.0%
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Enable Threshold
vs. Input Voltage
1.5
1.4
1.3
RISING
1.2
1.1
1.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
MIC22705
VIN Shutdown Current
vs. Input Voltage
20
16
12
8
4
V_EN/DLY = 0V
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Current Limit
vs. Input Voltage
20
15
10
5
V_OUT = 1.8V
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Enable Input Current
vs. Input Voltage
4
3
2
1
V_EN/DLY = 0V
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
0.707
Feedback Voltage
vs. Input Voltage
0.704
0.700
0.697
V_OUT = 1.8V
0.693
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
1200
1100
Switching Frequency
vs. Input Voltage
V_OUT = 1.8V
I_OUT = 0A
1000
900
800
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Power Good Threshold/VREF Ratio
vs. Input Voltage
100%
95%
90%
85%
V_REF = 0.7V
80%
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
March 2011
6
M9999-033111-A