MIC26400_11 Datasheet, PDF (7/27 Pages) Micrel Semiconductor – 5A Hyper Speed Control Synchronous DC/DC Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Efficiency
vs. Output Current
100
95
90
85
12VIN
24VIN
80
75
70
65
60
VOUT = 1.2V
55
VDD = 5V
50
0
1
2
3
4
5
OUTPUT CURRENT (A)
0.808
Feedback Voltage
vs. Output Current
0.804
0.800
0.796
0.792
0
VIN = 12V
VOUT = 1.2V
VDD = 5V
1
2
3
4
5
OUTPUT CURRENT (A)
0.5%
0.4%
0.3%
Line Regulation
vs. Output Current
VIN = 6V to 26V
VOUT = 1.2V
VDD = 5V
0.2%
0.1%
0.0%
0
1
2
3
4
5
OUTPUT CURRENT (A)
Die Temperature* (VIN = 5V)
vs. Output Current
60
390
360
330
300
270
240
210
0
Switching Frequency
vs. Output Current
VIN = 12V
VOUT = 1.2V
VDD = 5V
1
2
3
4
5
OUTPUT CURRENT (A)
Die Temperature* (VIN = 12V)
vs. Output Current
60
40
40
20
0
0
VIN = 5V
VOUT = 1.2V
VDD= 5V
1
2
3
4
5
OUTPUT CURRENT (A)
20
0
0
VIN = 12V
VOUT = 1.2V
VDD= 5V
1
2
3
4
5
OUTPUT CURRENT (A)
MIC26400
1.212
Output Voltage
vs. Output Current
1.208
1.204
1.2
1.196
1.192
VIN = 12V
VOUT = 1.2V
VDD = 5V
1.188
0
1
2
3
4
5
OUTPUT CURRENT (A)
5
4.8
4.6
4.4
4.2
4
3.8
3.6
3.4
0
Output Voltage (VIN = 5V)
vs. Output Current
VIN = 5V
VFB < 0.8V
VDD = 5V
TA
25ºC
85ºC
125ºC
1234567
OUTPUT CURRENT (A)
Die Temperature* (VIN = 24V)
vs. Output Current
60
40
20
0
0
VIN = 24V
VOUT = 1.2V
VDD = 5V
1
2
3
4
5
OUTPUT CURRENT (A)
July 2011
7
M9999-070111-C