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ISL85033 Datasheet, PDF (10/25 Pages) Intersil Corporation – Wide VIN Dual Standard Buck Regulator With 3A/3A Coutinuous Output Current
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ISL85033
Typical Performance Curves Circuit of Figure 2. VIN = 12V, VOUT1 = 5V, VOUT2 = 3.3V, IOUT1 = 3A,
IOUT2 = 3A, TA = -40°C to +85°C, unless otherwise noted. Typical
values are at TA = +25°C.
100
100
90
90
80
12VOUT 1MHz
9VOUT 1MHz
70
5VOUT 500kHz
60
3.3VOUT 500kHz
50
1.8VOUT 300kHz
40
0.0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 4. EFFICIENCY vs LOAD, TA = +25°C,
VIN = 28V
80
70
5VOUT
3.3VOUT
60
50
40
0.0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 5. EFFICIENCY vs LOAD, TA = +25°C,
FSW = 500kHz, VIN = 12V
100
90
80
70
9VIN
12VIN
28VIN
60
50
40
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 6. EFFICIENCY vs LOAD, TA = +25°C,
CURRENT SHARING 5VOUT, FSW = 500kHz
4.2
3.5
2.8
2.1
1.4
12VIN
0.7
28VIN
9VIN
0.0
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 7. POWER DISSIPATION vs LOAD,
TA = +25°C, CURRENT SHARING 5VOUT,
FSW = 500kHz
4.8
4.0
3.2
2.4
1.6
12VIN
0.8
28VIN
9VIN
0.0
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 8. POWER DISSIPATION vs LOAD,
TA = +85°C, CURRENT SHARING 5VOUT,
FSW = 500kHz
10
5.04
5.03
5.02
5.01
5.00
4.99
28VIN
9VIN
12VIN
4.98
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 9. VOUT REGULATION vs LOAD, CHANNEL 1,
TA = +25°C, 5VOUT, FSW = 500kHz
FN6676.1
June 24, 2010
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