ISL78228ARZ INTERSIL [Intersil Corporation], ISL78228ARZ Datasheet - Page 8

• Manufacturer Part Number: ISL78228ARZ
• Description: Dual 800mA Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator
• Manufacturer: INTERSIL [Intersil Corporation]

Typical Operating Performance
V
0A to 800mA. (Continued)
IN
FIGURE 14. STEADY STATE OPERATION AT NO LOAD CHANNEL 1
FIGURE 18. STEADY STATE OPERATION WITH FULL LOAD
FIGURE 16. STEADY STATE OPERATION AT NO LOAD CHANNEL 1
= 2.75V to 5.5V, EN = V
500ns/DIV
500ns/DIV
500ns/DIV
(PWM)
(PFM)
CHANNEL 1
V
V
V
OUT1
OUT1
OUT1
IN
I
I
LX1 2V/DIV
LX1 2V/DIV
I
RIPPLE 20mV/DIV
L1
L1
, L
LX1 2V/DIV
RIPPLE 20mV/DIV
L1
RIPPLE 20mV/DIV
1
0.5A/DIV
0.5A/DIV
0.5A/DIV
8
= L
2
= 2.2µH, C
1
= 10µF, C
2
ISL78228
= C
4
= 10µF, V
Unless otherwise noted, operating conditions are: T
FIGURE 15. STEADY STATE OPERATION AT NO LOAD CHANNEL 2
FIGURE 19. STEADY STATE OPERATION WITH FULL LOAD
FIGURE 17. STEADY STATE OPERATION AT NO LOAD CHANNEL 2
OUT1
500ns/DIV
500ns/DIV
500ns/DIV
= 2.5V, V
(PWM)
(PFM)
CHANNEL 2
OUT2
V
= 1.8V, I
V
OUT2
V
OUT2
OUT2
I
I
LX2 2V/DIV
L2
I
RIPPLE 20mV/DIV
L2
LX2 2V/DIV
L2
RIPPLE 20mV/DIV
LX2 2V/DIV
OUT1
0.5A/DIV
RIPPLE 20mV/DIV
0.5A/DIV
0.5A/DIV
= I
OUT2
=
A
= +25°C,
May 2, 2011
FN7849.0