ISL78208_14 Datasheet, PDF (9/24 Pages) Intersil Corporation – Wide VIN Dual Standard Buck Regulator with 3A/3A Continuous Output Current

ISL78208
Typical Performance Curves _TA
=
-40°C
to
+105°C,
unless
otherwise
noted.
Typical
values
Circuit of
are at T_A =
Figure 2.
+25°C.
V_IN
=
12V,
V_OUT1
=
5V,
V_OUT2
=
3.3V,
I_OUT1
=
3A,
I_OUT2
=
3A,
100
100
90
90
80
12V_OUT 1MHz
9V_OUT 1MHz
70
5V_OUT 500kHz
60
3.3V_OUT 500kHz
50
1.8V_OUT 300kHz
40
0.0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 4. EFFICIENCY vs LOAD, T_A = +25°C, V_IN = 28V
80
70
5V_OUT
3.3V_OUT
60
50
400.0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 5. EFFICIENCY vs LOAD, T_A = +25°C, F_SW = 500kHz,
V_IN = 12V
100
90
80
70
9V_IN
12V_IN
28V_IN
60
50
40
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 6. EFFICIENCY vs LOAD, T_A = +25°C, CURRENT SHARING
5V_OUT, F_SW = 500kHz
4.2
3.5
2.8
2.1
1.4
12V_IN
0.7
28V_IN
9V_IN
0.0
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 7. POWER DISSIPATION vs LOAD, T_A = +25°C,
CURRENT SHARING 5V_OUT, F_SW = 500kHz
4.8
4.0
3.2
2.4
1.6
12V_IN
0.8
0.0
28V_IN
9V_IN
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 8. POWER DISSIPATION vs LOAD, T_A = +85°C,
CURRENT SHARING 5V_OUT, F_SW = 500kHz
5.04
5.03
5.02
5.01
5.00
4.99
28V_IN
9V_IN
12V_IN
4.98
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 9. V_OUT REGULATION vs LOAD, CHANNEL 1,
T_A = +25°C, 5V_OUT, F_SW = 500kHz
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9
FN8354.1
July 29, 2014