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ISL78208 Datasheet, PDF (10/25 Pages) Intersil Corporation – Wide VIN Dual Standard Buck Regulator with 3A/3A Continuous Output Current
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ISL78208
Typical Performance Curves Circuit of Figure 2. VIN = 12V, VOUT1 = 5V, VOUT2 = 3.3V, IOUT1 = 3A, IOUT2 = 3A,
TA = -40°C to +105°C, unless otherwise noted. Typical values are at TA = +25°C. (Continued)
5.04
3.329
5.03
5.02
5.01
5.00
28VIN
9VIN
12VIN
3.328
3.326
3.325
3.323
28VIN
18VIN
4.99
4.98
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 10. VOUT REGULATION vs LOAD, CURRENT SHARING,
TA = +25°C, 5VOUT, FSW = 500kHz
3.322
12VIN
3.320
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 11. VOUT REGULATION vs LOAD, CHANNEL 2, TA = +25°C,
3.3VOUT, FSW = 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 VIN, CHANNEL 1,
TA = +25°C, 5VOUT, FSW = 500kHz
5.02
5.01
5.00
0A
4.99
4.98
4A 6A
4.97
4.96
0
5
10
15
20
25
30
INPUT VOLTAGE (V)
FIGURE 13. OUTPUT VOLTAGE REGULATION vs VIN, CURRENT
SHARING, TA = +25°C, 5VOUT, FSW = 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 VIN, CHANNEL 2,
TA = +25°C, 3.3VOUT, FSW = 500kHz
LX1 5V/DIV
VOUT1 RIPPLE 20mV/DIV
IL1 0.1A/DIV
FIGURE 15. STEADY STATE OPERATION AT NO LOAD CHANNEL 1
10
FN8354.0
July 12, 2013
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