ISL78322 Datasheet, PDF (10/18 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)
V_OUT1 RIPPLE 50mV/DIV
V_OUT2 RIPPLE 50mV/DIV
PG 5V/DIV
PG 5V/DIV
IL1 1A/DIV
TB = 200µs/DIV
FIGURE 20. LOAD TRANSIENT CHANNEL 1 (PWM)
IL2 1A/DIV
TB = 200µs/DIV
FIGURE 21. LOAD TRANSIENT CHANNEL 2 (PWM)
LX2 2V/DIV
V_OUT1 RIPPLE 50mV/DIV
IL1 1A/DIV
TB = 1ms/DIV
FIGURE 22. LOAD TRANSIENT CHANNEL 1 (PFM)
LX2 2V/DIV
V_OUT2 RIPPLE 50mV/DIV
IL2 1A/DIV
TB = 1ms/DIV
FIGURE 23. LOAD TRANSIENT CHANNEL 2 (PFM)
EN1 2V/DIV
V_OUT1 1V/DIV
IL1 0.5A/DIV
PG 5V/DIV
TB = 500µs/DIV
FIGURE 24. SOFT-START WITH NO LOAD CHANNEL 1 (PWM)
EN2 2V/DIV
V_OUT2 1V/DIV
IL2 0.5A/DIV
PG 5V/DIV
TB = 500µs/DIV
FIGURE 25. SOFT-START WITH NO LOAD CHANNEL 2 (PWM)
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FN7908.2
August 26, 2014