ISL78214_15 Datasheet, PDF (7/15 Pages) Intersil Corporation – 4A Low Quiescent Current High Efficiency Synchronous Buck Regulator

ISL78214
Typical Operating Performance Unless otherwise noted, operating conditions are: T_A = +25°C, V_VIN = 2.5V to 5.5V,
EN = V_IN, SYNCH = 0V, L = 1.5µH, C₁ = 2x22µF, C₂ = 2x22µF, I_OUT = 0A to 4A. (Continued)
0.25
1.24
0.20
0.15
0.10
0.05
1.23
1.22 _3.3VIN-PFM
1.21
1.20
1.19
1.18
1.17
5V_IN-PWM
5V_IN-PFM
3.3V_IN-PWM
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
V_IN (V)
1.16
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LOAD (A)
FIGURE 9. POWER DISSIPATION WITH NO LOAD vs V_IN
(PFM V_OUT = 1.8V)
FIGURE 10. V_OUT REGULATION vs LOAD (1MHz, V_OUT = 1.2V)
1.55
1.54
3.3V_IN-PFM
1.53
3.3V_IN-PWM
1.52
1.51
1.50
1.49
5V_IN-PWM
5V_IN-PFM
1.48
1.47
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LOAD (A)
FIGURE 11. V_OUT REGULATION vs LOAD (1MHz, V_OUT = 1.5V)
1.83
1.82 _3.3VIN-PFM
1.81
3.3V_IN-PWM
1.80
1.79
1.78
1.77
1.76
5V_IN-PFM
5V_IN-PWM
1.75
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LOAD (A)
FIGURE 12. V_OUT REGULATION vs LOAD (1MHz, V_OUT = 1.8V)
2.52
2.51
3.3V_IN-PFM
2.50
3.3V_IN-PWM
2.49
2.48
2.47
2.46
5V_IN-PWM
2.45 5VIN-PFM
2.44
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LOAD (A)
FIGURE 13. V_OUT REGULATION vs LOAD (1MHz, V_OUT = 2.5V)
3.36
3.35
3.34
5V_IN-PWM
4.5V_IN-PWM
3.33
3.32
3.31
4.5V_IN-PFM
3.30 5V_IN-PFM
3.29
3.28
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LOAD (A)
FIGURE 14. V_OUT REGULATION vs LOAD (1MHz, V_OUT = 3.3V)
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FN7551.3
May 12, 2015