ISL78213 Datasheet, PDF (8/15 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)
1.830
1.830
1.820
1.810
1.800
3A LOAD PWM
0A LOAD PWM
1.820
1.810
1.800
3A LOAD
0A LOAD
1.790
1.790
1.780
1.780
1.770
1.770
1.760
1.760
1.750
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
FIGURE 15. OUTPUT VOLTAGE REGULATION vs VIN
(PWM V_OUT = 1.8 )
1.750
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
FIGURE 16. OUTPUT VOLTAGE REGULATION vs VIN
(PFM V_OUT = 1.8V)
LX 2V/DIV
V_OUT RIPPLE 20mV/DIV
IL 0.5A/DIV
FIGURE 17. STEADY STATE OPERATION AT NO LOAD
(PWM)
LX 2V/DIV
V_OUT RIPPLE 20mV/DIV
IL 0.5A/DIV
FIGURE 18. STEADY STATE OPERATION AT NO LOAD
(PFM)
LX 2V/DIV
LX 2V/DIV
IL 1A/DIV
V_OUT RIPPLE 20mV/DIV
FIGURE 19. STEADY STATE OPERATION WITH FULL
LOAD
8
V_OUT RIPPLE 50mV/DIV
IL 1A/DIV
FIGURE 20. MODE TRANSITION CCM TO DCM
FN7550.1
March 16, 2010