MIC2176-1 Datasheet, PDF (8/31 Pages) Micrel Semiconductor – Wide Input Voltage, Synchronous Buck Controllers Featuring Adaptive On-Time Control

Micrel, Inc.
MIC2176
Typical Characteristics (Continued)
95
90
85
80
75
70
65
60
55
50
45
40
0
Efficiency
vs. Output Current
28V_IN
48VIN
60VIN
MIC2176-2
VOUT = 3.3V
VDD = 5V LINEAR
1
2
3
4
5
OUTPUT CURRENT (A)
1.0%
0.8%
0.6%
0.4%
Line Regulation
vs. Output Current
VIN = 6V to 70V
VOUT = 3.3V
VDD = 5V
0.2%
0.0%
-0.2%
0
1
2
3
4
5
OUTPUT CURRENT (A)
0.808
0.806
0.804
0.802
0.800
0.798
0.796
0.794
0.792
0
Feedback Voltage
vs. Output Current
VIN = 48V
VOUT = 3.3V
VDD = 5V
1
2
3
4
5
OUTPUT CURRENT (A)
Switching Frequency
vs. Output Current
240
220
200
180
160
0
MIC2176-2
VIN = 48V
VOUT = 3.3V
VDD = 5V
1
2
3
4
5
OUTPUT CURRENT (A)
IC Case Temperature* (VIN = 48V)
vs. Output Current
80
60
40
20
0
0
MIC2176-2
VIN = 48V
VOUT = 3.3V
VDD= 5V
1
2
3
4
5
OUTPUT CURRENT (A)
IC Case Temperature* (VIN = 60V)
vs. Output Current
100
80
60
40
20
0
0
MIC2176-2
V_IN = 60V
V_OUT = 3.3V
VDD = 5V
1
2
3
4
5
OUTPUT CURRENT (A)
3.333
Output Voltage
vs. Output Current
3.322
3.311
VIN = 48V
VOUT = 3.3V
VDD = 5V
3.300
3.289
3.278
3.267
0
1
2
3
4
5
OUTPUT CURRENT (A)
IC Case Temperature* (VIN = 28V)
vs. Output Current
60
40
20
0
0
MIC2176-2
VIN = 28V
VOUT = 3.3V
VDD= 5V
1
2
3
4
5
OUTPUT CURRENT (A)
Case Temperature* : The temperature measurement was taken at the hottest point on the MIC2176 case mounted on a 5 square inch PCB, see
Thermal Measurement section. Actual results will depend upon the size of the PCB, ambient temperature and proximity to other heat emitting
components.
November 2010
8
M9999-111710-A