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ISL78214_15 Datasheet, PDF (6/15 Pages) Intersil Corporation – 4A Low Quiescent Current High Efficiency Synchronous Buck Regulator
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ISL78214
Typical Operating Performance Unless otherwise noted, operating conditions are: TA = +25°C, VVIN = 2.5V to 5.5V,
EN = VIN, SYNCH = 0V, L = 1.5µH, C1 = 2x22µF, C2 = 2x22µF, IOUT = 0A to 4A.
100
100
90
80
2.5VOUT-PWM
1.8VOUT-PWM
70
1.5VOUT-PWM
1.2VOUT-PWM
60
90
80
2.5VOUT-PFM
1.8VOUT-PFM 1.5VOUT-PFM 1.2VOUT-PFM
70
60
50
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)
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
70
2.5VOUT-PWM
3.3VOUT-PWM
1.8VOUT-PWM
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 5. EFFICIENCY vs LOAD (1MHz 5VIN PWM)
100
90
80
70
2.5VOUT-PFM
3.3VOUT-PFM
60
1.5VOUT-PFM1.2VOUT-PFM
1.8VOUT-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
5VIN-PWM
3.3VIN-PFM
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)
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6
FN7551.3
May 12, 2015
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