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ISL8018 Datasheet, PDF (9/21 Pages) Intersil Corporation – 8A Low Quiescent Current High Efficiency Synchronous Buck Regulator
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ISL8018
Typical Operating Performance Unless otherwise noted, operating conditions are: TA = +25°C, VIN = 5V, EN = 3.3V,
SYNCIN = VIN, L = 1µH, C1 = 2x22µF, C2 = 4x22µF, VOUT = 1.8V, IOUT = 0A to 8A.
100
100
2.5VOUT
2.5VOUT
90
90
1.2VOUT
80
1.5VOUT
1.2VOUT
80
1.5VOUT
70
1.8VOUT
70
1.8VOUT
60
60
50
40
0
1
2
3
4
5
6
7
8
IOUT (A)
FIGURE 4. EFFICIENCY vs LOAD (1MHz 3.3VIN PWM)
50
40
0
1
2
3
4
5
6
7
8
IOUT (A)
FIGURE 5. EFFICIENCY vs LOAD (1MHz 3.3VIN PFM)
100
3.3VOUT
2.5VOUT
90
1.2VOUT
1.5VOUT
80
1.8VOUT
70
60
50
40
0
1
2
3
4
5
6
7
8
IOUT (A)
FIGURE 6. EFFICIENCY vs LOAD (1MHz 5VIN PWM)
100
3.3VOUT
2.5VOUT
90
1.2VOUT
1.5VOUT
80
1.8VOUT
70
60
50
40
0
1
2
3
4
5
6
7
8
IOUT (A)
FIGURE 7. EFFICIENCY vs LOAD (1MHz 5VIN PFM)
3.5
3.0
2.5
5VIN PWM MODE
2.0
3.3VIN PWM MODE
1.5
1.0
0.5
00
1
2
3
4
5
6
7
8
IOUT (A)
FIGURE 8. POWER DISSIPATION vs LOAD (1MHz, VOUT = 1.8V)
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9
1.815
1.810
1.805
0A LOAD
1.800
1.795
1.790
4A LOAD
1.785
1.780
8A LOAD
1.775
2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5
IOUT (A)
FIGURE 9. VOUT REGULATION vs VIN (PWM VOUT = 1.8V)
FN7889.0
September 30, 2015
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