MIC45116 Datasheet, PDF (26/42 Pages) Microchip Technology – 20V/6A DC/DC Power Module

MIC45116
Wherever possible, an infrared thermometer is
recommended. The measurement spot size of most
infrared thermometers is too large for an accurate
reading on a small form factor ICs. However, an IR
thermometer from Optris has a 1 mm spot size, which
makes it a good choice for measuring the hottest point
on the case. An optional stand makes it easy to hold the
beam on the IC for long periods of time.
The safe operating area (SOA) of the MIC45116 is
shown in Figure 10 and Figure 11. These thermal
measurements were taken on MIC45116 evaluation
board with no air flow. Since the MIC45116 is an entire
system comprised of switching regulator controller,
MOSFETs, and inductor, the part needs to be
considered as a system. The SOA curves will give
guidance to reasonable use of the MIC45116.
SOA curves should only be used as a point of
reference. SOA data was acquired using the MIC45116
evaluation board. Thermal performance depends on
the PCB layout, board size, copper thickness, number
of thermal vias, and actual airflow.
7
6
5
4
1.0V OUTPUT
3
3.3V OUTPUT
5.0V OUTPUT
2
1
75 80 85 90 95 100 105 110 115 120 125
AMBIENT TEMPERATURE (°C)
FIGURE 5-5:
MIC45116 Power Derating
vs. Output Voltage with 12V Input with No
Airflow.
7
6
5
4
5V OUTPUT
3
12V OUTPUT
2
1
75 80 85 90 95 100 105 110 115 120 125
AMBIENT TEMPERATURE (°C)
FIGURE 5-6:
MIC45116 Power Derating
vs. Input Voltage with 1.0V Output with No
Airflow.
DS20005571A-page 26
 2016 Microchip Technology Inc.