MIC28510_12 Datasheet, PDF (7/30 Pages) Micrel Semiconductor – 75V/4A Hyper Speed Control Synchronous DC/DC Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
-50
VDD UVLO Threshold
vs. Temperature
V_IN = 48V
I_OUT = 0A
RISING
FALLING
-25
0
25
50
75 100 125
TEMPERATURE (°C)
V_IN Operating Supply Current
vs. Temperature
20
VIN = 48V
16
V_OUT = 3.3V
V_DD = 5V
IOUT = 0A
12 ^fSW ^{= 250kHz}
8
4
0
-50 -25
0
25
50
75 100 125
TEMPERATURE (°C)
MIC28510
V_IN Shutdown Current
vs. Temperature
400
320
240
V_IN = 48V
160
VDD = 5V
VEN = 0V
IOUT = 0A
80
0
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
Output Peak Current Limit
vs. Temperature
15
V_IN = 48V
12
VOUT = 3.3V
VDD = 5V
fSW = 250kHz
9
6
3
0
-50 -25
0
25 50 75 100 125
TEMPERATURE (°C)
0.808
0.804
0.800
Feedback Voltage
vs. Temperature
VIN = 48V
VOUT = 3.3V
VDD = 5V
IOUT = 0A
0.796
0.792
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
0.4%
0.3%
0.2%
0.1%
Load Regulation
vs. Temperature
VIN = 48V
VOUT = 3.3V
V_DD = 5V
IOUT = 0A to 4A
fSW = 250kHz
0.0%
-0.1%
-0.2%
-0.3%
-50 -25
0
25 50 75 100 125
TEMPERATURE (°C)
0.4%
0.3%
0.2%
0.1%
Line Regulation
vs. Temperature
VIN = 5V to 75V
VOUT = 3.3V
V_DD = 5V
IOUT = 0A
0.0%
-0.1%
-0.2%
-0.3%
-50 -25 0
25 50 75 100 125
TEMPERATURE (°C)
Switching Frequency
vs. Output Current
300
-40°C
250
25°C
200
125°C
V_IN = 48V
150
VOUT = 3.3V
VDD = 5V
R18 = 100k
R19 =100k
100
0
1
2
3
4
OUTPUT CURRENT (A)
EN Bias Current
vs. Temperature
100
V_IN = 48V
80
V_DD = 5V
V_EN = 0V
60
40
20
0
-50 -25
0
25
50
75 100 125
TEMPERATURE (°C)
March 2012
7
M9999-030912-A