ISL78322 Datasheet, PDF (11/18 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)
EN1 2V/DIV
V_OUT1 1V/DIV
IL1 0.5A/DIV
PG 5V/DIV
TB = 500µs/DIV
FIGURE 26. SOFT-START AT NO LOAD CHANNEL 1 (PFM)
EN2 2V/DIV
V_OUT2 1V/DIV
IL2 0.5A/DIV
PG 5V/DIV
TB = 500µs/DIV
FIGURE 27. SOFT-START AT NO LOAD CHANNEL 2 (PFM)
EN1 2V/DIV
V_OUT1 1V/DIV
IL1 1A/DIV
PG 5V/DIV
TB = 500µs/DIV
FIGURE 28. SOFT-START AT FULL LOAD CHANNEL 1
EN1 2V/DIV
V_OUT1 1V/DIV
IL1 0.2A/DIV
PG 5V/DIV
TB = 200µs/DIV
FIGURE 30. SOFT-DISCHARGE SHUTDOWN CHANNEL 1
EN2 2V/DIV
V_OUT2 1V/DIV
IL2 1A/DIV
PG 5V/DIV
TB = 500µs/DIV
FIGURE 29. SOFT-START AT FULL LOAD CHANNEL 2
EN2 2V/DIV
V_OUT2 1V/DIV
IL2 0.2A/DIV
PG 5V/DIV
TB = 200µs/DIV
FIGURE 31. SOFT-DISCHARGE SHUTDOWN CHANNEL 2
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August 26, 2014