ISL8014 Просмотр технического описания (PDF) - Renesas Electronics
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ISL8014 Datasheet PDF : 17 Pages
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ISL8014
Typical Operating Performance
100
90
80
2.5VOUT-PWM
1.8VOUT-PWM
70
1.5VOUT-PWM
1.2VOUT-PWM
60
50
40
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LOAD (A)
FIGURE 3. EFFICIENCY vs LOAD (1MHz 3.3 VIN PWM)
(Unless otherwise noted, operating conditions are: TA = +25°C,
VVIN
C1 =
= 2.5V to 5.5V, EN = VIN, SYNCH =
2x22µF, C2 = 2x22µF, IOUT = 0A to
0V, L
4A).
=
1.5µH,
100
90
80
2.5VOUT-PFM
1.8VOUT-PFM 1.5VOUT-PFM1.2VOUT-PFM
70
60
50
40
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT LOAD (A)
FIGURE 4. EFFICIENCY vs LOAD (1MHz 3.3 VIN PFM)
100
90
80
2.5VOUT-PWM1.8VOUT-PWM 1.5VOUT-PWM
70 3.3VOUT-PWM
1.2VOUT-PWM
60
50
400.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LOAD (A)
FIGURE 5. EFFICIENCY vs LOAD (1MHz 5VIN PWM)
100
90
80
70
2.5VOUT-PFM 1.8VOUT-PFM1.5VOUT1-P.2FVMOUT-PFM
60 3.3VOUT-PFM
50
40
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT LOAD (A)
FIGURE 6. EFFICIENCY vs LOAD (1MHz 5VIN PFM)
2.00
1.75
3.3VIN-PWM
1.50
1.25
1.00
5VIN-PFM
0.75
0.50
0.25
3.3VIN-PFM
5VIN-PWM
0.00
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LOAD (A)
FIGURE 7. POWER DISSIPATION vs LOAD (1MHz,
VOUT = 1.8V)
125
100
75
50
25
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
FIGURE 8. POWER DISSIPATION WITH NO LOAD vs
VIN (PWM VOUT = 1.8V)
FN6576 Rev 4.00
November 23, 2009
Page 6 of 17
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