MIC28512 Datasheet, PDF (10/34 Pages) Microchip Technology – 70V, 2A Synchronous Buck Regulator

MIC28512
100
90
80
70
60
50
40
30
20
10
0.01
5.0V
3.3V
FSW= 300kHz
0.1
1
10
OUTPUT CURRENT (A)
FIGURE 2-19:
Efficiency (VIN = 48V) vs.
Output Current MIC28512-2.
1.0
0.8 ^{VfSINW==1320V0kHz}
0.6
0.4
5.0V
3.3V
0.2
0.0
0
0.5
1
1.5
2
OUTPUT CURRENT (A)
FIGURE 2-20:
Output Current.
IC Power Dissipation vs.
1.2
V_Ii_Nn ==2244VV
1.0 f_SW = 300kHz
0.8
0.6
5.0V
3.3V
0.4
0.2
0.0
0
FIGURE 2-21:
Output Current.
0.5
1
1.5
2
OUTPUT CURRENT (A)
IC Power Dissipation vs.
2.4
2.0 fVS_SW^iI_Wn^N====3324004800VVkkHHzz
1.6
1.2
5.0V
3.3V
0.8
0.4
0.0
0
0.5
1
1.5
2
OUTPUT CURRENT (A)
FIGURE 2-22:
Output Current.
IC Power Dissipation vs.
2.5
2.0
1.5
Vin =1224V
1.0
f_SW = 300kHz
Tjmax =125°C
Θja = 430°C/W
0.5
5.0V
3.3V
0.0
25
40
55
70
85
100
AMBIENT TEMPERATURE (°C)
FIGURE 2-23:
12V Input Thermal Derating.
2.5
2.0
5.0V
3.3V
1.5
Vin =24V
1.0 _{TfSjmW=a3x0=01k2H5z°C}
Θja = 30°C/W
0.5
0.0
25 40 55 70 85 100
AMBIENT TEMPERATURE (°C)
FIGURE 2-24:
(MIC28512-1).
24V Input Thermal Derating
DS20005524A-page 10
 2016 Microchip Technology Inc.