ISL78322 Datasheet, PDF (8/18 Pages) Intersil Corporation – Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

ISL78322
Typical Operating Performance (Unless otherwise noted) operating conditions are:
T_A = +25°C, V_VIN = 2.8V to 5.5V, EN = V_IN, L₁ = L₂ = 1.2µH, C₁ = 10µF, C₂ = C₄ = 22µF, I_OUT1 = 0A to 2A, I_OUT2 = 0A to 1.7A. (Continued)
1.54
2.53
1.53
1.52
1.51
1.50
5V_IN PFM
5V_IN PWM
3.3V V_IN PFM
2.52
2.51
2.50
2.49
5V_IN PFM
5V_IN PWM
3.3V V_IN PFM
1.49
3.3V V_IN PWM
1.48
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT LOAD (A)
FIGURE 9. V_OUT REGULATION vs LOAD, 2.25MHz, 1.5V CHANNEL 2
2.48
3.3V V_IN PWM
2.47
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT LOAD (A)
FIGURE 10. V_OUT REGULATION vs LOAD, 2.25MHz, 2.5V CHANNEL 1
1.83
1.82
3.3V V_IN PFM
1.81
1.80
5 V_IN PFM
1.79
1.78 ^{3.3V VIN PWM}
5V_IN PWM
1.77
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT LOAD (A)
FIGURE 11. V_OUT REGULATION vs LOAD, 2.25MHz, 1.8V, CHANNEL 2
2.54
2.53
2.52
2.51
0A LOAD PFM
2A LOAD
2.50
2.49
0A LOAD PWM
1A LOAD
2.48
2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5
INPUT VOLTAGE (V)
FIGURE 12. OUTPUT VOLTAGE REGULATION vs V_IN 2.5V CHANNEL 1
1.83
1.82
1.81
1.80
0A LOAD PWM
0A LOAD PFM
1.79
0.8A LOAD
1.78
1.7A LOAD
1.77
2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5
INPUT VOLTAGE (V)
FIGURE 13. OUTPUT VOLTAGE REGULATION vs V_IN 1.8V CHANNEL 2
Submit Document Feedback
8
FN7908.2
August 26, 2014