MIC28510_12 Datasheet, PDF (6/30 Pages) Micrel Semiconductor – 75V/4A Hyper Speed Control Synchronous DC/DC Buck Regulator

Micrel, Inc.
Typical Characteristics
VIN Operating Supply Current
vs. Input Voltage
20
V_OUT = 3.3V
16
I_OUT = 0A
V_DD = 5V
f_SW = 250kHz
12
8
4
0
5
15 25 35 45 55 65 75
INPUT VOLTAGE (V)
VIN Shutdown Current
vs. Input Voltage
400
300
200
V_DD = 5V
V_EN = 0V
100
0
5
15
25
35
45
55
65
75
INPUT VOLTAGE (V)
MIC28510
V_DD Operating Supply Current
vs. Input Voltage
10
8
6
VOUT = 3.3V
4
V_DD= 5V
fSW = 250kHz
2
0
5
15
25
35
45
55
65
75
INPUT VOLTAGE (V)
0.808
0.804
0.800
Feedback Voltage
vs. Input Voltage
VOUT = 3.3V
VDD = 5V
I_OUT = 0A
f_SW = 250kHz
0.796
0.792
5
15 25 35 45 55 65 75
INPUT VOLTAGE (V)
1.0%
0.8%
0.6%
0.4%
0.2%
0.0%
-0.2%
-0.4%
-0.6%
-0.8%
-1.0%
5
Total Regulation
vs. Input Voltage
VOUT = 3.3V
VDD = 5V
IOUT = 0A to 4A
fSW = 250kHz
15 25 35 45 55 65 75
INPUT VOLTAGE (V)
Output Peak Current Limit
vs. Input Voltage
15
V_OUT = 3.3V
12
V_DD = 5V
fSW = 250kHz
9
6
3
0
5
15
25
35
45
55
65
75
INPUT VOLTAGE (V)
Switching Frequency
vs. Input Voltage
300
250
200
VOUT = 3.3V
VDD = 5V
I_OUT = 1A
150
R18 =100k
R19 =100k
100
5
15
25
35
45
55
65
75
INPUT VOLTAGE (V)
VDD Operating Supply Current
vs. Temperature
12
10
8
6
V_IN = 48V
V_OUT = 3.3V
4
V_DD = 5V
I_OUT = 0A
2
f_SW = 250kHz
0
-50 -25
0
25 50 75 100 125
TEMPERATURE (°C)
V_DD Shutdown Current
vs. Temperature
1.0
0.8
0.6
0.4
V_IN = 48V
I_OUT = 0A
V_DD = 5V
0.2
V_EN = 0V
0.0
-50
-25 0 25 50 75 100 125
TEMPERATURE (°C)
March 2012
6
M9999-030912-A