ISL78213 Datasheet, PDF (10/15 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)
EN 5V/DIV
EN 5V/DIV
V_OUT 0.5V/DIV
IL 1A/DIV
PG 5V/DIV
FIGURE 27. SOFT-START AT FULL LOAD
V_OUT 0.5V/DIV
IL 1A/DIV
PG 5V/DIV
FIGURE 28. SOFT-DISCHARGE SHUTDOWN
LX 2V/DIV
SYNCH 2V/DIV
V_OUT RIPPLE 20mV/DIV
IL 1A/DIV
FIGURE 29. STEADY STATE OPERATION AT NO LOAD
WITH FREQUENCY = 2MHz
LX 2V/DIV
IL 1A/DIV
SYNCH 2V/DIV
V_OUT RIPPLE 20mV/DIV
FIGURE 30. STEADY STATE OPERATION AT FULL
LOAD WITH FREQUENCY = 2MHz
LX 2V/DIV
SYNCH 2V/DIV
IL 1A/DIV
V_OUT RIPPLE 20mV/DIV
FIGURE 31. STEADY STATE OPERATION AT NO LOAD
WITH FREQUENCY = 4MHz
10
LX 2V/DIV
IL 1A/DIV
SYNCH 2V/DIV
V_OUT RIPPLE 20mV/DIV
FIGURE 32. STEADY STATE OPERATION AT FULL
LOAD (PWM) WITH FREQUENCY = 4MHz
FN7550.1
March 16, 2010