ISL78208_14 Datasheet, PDF (10/24 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 =
F+i2gu5r°eC2. .(CVo_{INnt=in1u2eVd,)}
V_OUT1
=
5V,
V_OUT2
=
3.3V,
I_OUT1
=
3A,
I_OUT2
=
3A,
5.04
3.329
5.03
5.02
5.01
5.00
28V_IN
9V_IN
12V_IN
3.328
3.326
3.325
3.323
28V_IN
18V_IN
4.99
4.98
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 10. V_OUT REGULATION vs LOAD, CURRENT SHARING,
T_A = +25°C, 5V_OUT, F_SW = 500kHz
3.322
12V_IN
3.320
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 11. V_OUT REGULATION vs LOAD, CHANNEL 2, T_A = +25°C,
3.3V_OUT, F_SW = 500kHz
5.04
5.03
5.02
5.01
5.00
3A 2A 0A
4.99
4.98
0
5
10
15
20
25
30
INPUT VOLTAGE (V)
FIGURE 12. OUTPUT VOLTAGE REGULATION vs V_IN, CHANNEL 1,
T_A = +25°C, 5V_OUT, F_SW = 500kHz
5.02
5.01
5.00
4.99
0A
4.98
4A _6A
4.97
4.96
0
5
10
15
20
25
30
INPUT VOLTAGE (V)
FIGURE 13. OUTPUT VOLTAGE REGULATION vs V_IN, CURRENT
SHARING, T_A = +25°C, 5V_OUT, F_SW = 500kHz
3.340
3.335
3.330
3.325
3.320
3.315
0A 2A
3A
3.310
0
5
10
15
20
25
30
INPUT VOLTAGE (V)
FIGURE 14. OUTPUT VOLTAGE REGULATION vs V_IN, CHANNEL 2,
T_A = +25°C, 3.3V_OUT, F_SW = 500kHz
LX1 5V/DIV
V_OUT1 RIPPLE 20mV/DIV
IL1 0.1A/DIV
FIGURE 15. STEADY STATE OPERATION AT NO LOAD CHANNEL 1
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FN8354.1
July 29, 2014