ISL8024 데이터 시트보기 (PDF) - Intersil
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ISL8024 Datasheet PDF : 20 Pages
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ISL8023, ISL8024
Typical Operating Performance Unless otherwise noted, operating conditions are: TA = +25°C, VVIN = 5V, EN = VIN,
SYNC = VIN, L = 1.0µH, C1 = 22µF, C2 = 2 x 22µF, IOUT = 0A to 4A.
100
100
90
80
1.2VOUT
1.5VOUT 1.8VOUT
70
2.5VOUT
90
1.2VOUT
80
1.5VOUT 1.8VOUT
70
2.5VOUT
60
60
50
50
40
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
IOUT (A)
FIGURE 5. EFFICIENCY vs LOAD (1MHz 3.3 VIN PWM)
40
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
IOUT (A)
FIGURE 6. EFFICIENCY vs LOAD (1MHz 3.3 VIN PFM)
100
90
80
1.2VOUT 1.5VOUT
1.8VOUT
2.5VOUT
3.3VOUT
70
60
50
40
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
IOUT (A)
FIGURE 7. EFFICIENCY vs LOAD (1MHz 5VIN PWM)
1.08
0.90
0.72
0.54
3.3VIN PWM MODE
0.36
5VIN PWM MODE
0.18
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
IOUT (A)
FIGURE 9. POWER DISSIPATION vs LOAD (1MHz, VOUT = 1.8V)
100
90
80 1.2VOUT
70
1.5VOUT 1.8VOUT 2.5VOUT 3.3VOUT
60
50
40
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
IOUT (A)
FIGURE 8. EFFICIENCY vs LOAD (1MHz 5VIN PFM)
1.244
1.238
1.232
1.226
1.220
3.3VIN PFM MODE
5VIN PFM MODE
1.214
3.3VIN PWM MODE
1.208
0.0 0.5 1.0 1.5 2.0
IOUT (A)
5VIN PWM MODE
2.5 3.0 3.5 4.0
FIGURE 10. VOUT REGULATION vs LOAD (1MHz, VOUT = 1.2V)
8
FN7812.2
May 17, 2012
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