ISL78233 Datasheet, PDF (10/18 Pages) Intersil Corporation – 3A and 4A Compact Synchronous Buck Regulators

ISL78233, ISL78234
Typical Operating Performance Unless otherwise noted, operating conditions are: T_A = +25°C, V_VIN = 5V,
EN = V_IN, SYNC = V_IN, L = 1.0µH, C₁ = 22µF, C₂ = 2 x 22µF, I_OUT = 0A to 4A. (Continued)
PHASE 1V/DIV
PHASE 1V/DIV
10ns/DIV
FIGURE 22. JITTER AT NO LOAD PWM (1MHz)
PHASE 5V/DIV
V_OUT RIPPLE 20mV/DIV
I_L 1A/DIV
500ns/DIV
FIGURE 24. STEADY STATE AT NO LOAD PWM
10ns/DIV
FIGURE 23. JITTER AT FULL LOAD PWM (1MHz)
PHASE 5V/DIV
V_OUT RIPPLE 20mV/DIV
I_L 1A/DIV
20ms/DIV
FIGURE 25. STEADY STATE AT NO LOAD PFM
PHASE 5V/DIV
V_OUT RIPPLE 20mV/DIV
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I_L 2A/DIV
500ns/DIV
FIGURE 26. STEADY STATE AT 4A PWM
FN8359.5
April 23, 2015