ISL78213 Datasheet, PDF (9/15 Pages) Intersil Corporation – 3A Low Quiescent Current, High Efficiency Synchronous Buck Regulator

ISL78213
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 3A. (Continued)
LX 2V/DIV
V_OUT RIPPLE 50mV/DIV
IL 1A/DIV
FIGURE 21. MODE TRANSITION DCM TO CCM
V_OUT RIPPLE 50mV/DIV
IL 1A/DIV
FIGURE 22. LOAD TRANSIENT (PWM)
LX 2V/DIV
V_OUT RIPPLE 50mV/DIV
IL 1A/DIV
FIGURE 23. LOAD TRANSIENT (PFM)
EN 5V/DIV
V_OUT 0.5V/DIV
IL 1A/DIV
PG 5V/DIV
FIGURE 24. SOFT-START WITH NO LOAD (PWM)
EN 5V/DIV
V_OUT 0.5V/DIV
IL 1A/DIV
PG 5V/DIV
FIGURE 25. SOFT-START AT NO LOAD (PFM)
9
EN 5V/DIV
V_OUT 0.5V/DIV
IL 5A/DIV
PG 5V/DIV
FIGURE 26. SOFT-START WITH PRE-BIASED 1V
FN7550.1
March 16, 2010