ISL78228ARZ INTERSIL [Intersil Corporation], ISL78228ARZ Datasheet - Page 12

• 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
I
10µs/DIV
= 2.75V to 5.5V, EN = V
L1
PHASE1 5V/DIV
0.5A/DIV
FIGURE 38. OUTPUT SHORT CIRCUIT CHANNEL 1
FIGURE 40. OUTPUT SHORT CIRCUIT CHANNEL 2
IN
, L
V
OUT1
1
12
PG 5V/DIV
= L
1V/DIV
2
= 2.2µH, C
2.4
2.0
1.6
1.2
0.8
0.4
0
-50
FIGURE 42. OUTPUT CURRENT LIMIT vs TEMPERATURE
V
IN
PHASE2 5V/DIV
V
1
OUT2
3.5V I
-30
I
= 10µF, C
L2
PG 5V/DIV
10µs/DIV
0.5A/DIV
1V/DIV
OUT2
-10
2
V
ISL78228
OC
= C
IN
TEMPERATURE (°C)
10
4
6V I
= 10µF, V
Unless otherwise noted, operating conditions are: T
OUT1
20
OC
OUT1
FIGURE 39. OUTPUT SHORT CIRCUIT RECOVERY CHANNEL 1
FIGURE 41. OUTPUT SHORT CIRCUIT RECOVERY CHANNEL 2
500µs/DIV
500µs/DIV
V
IN
50
= 2.5V, V
3.5V I
V
IN
70
6V I
OUT1
OUT2
OUT2
= 1.8V, I
OC
90
OC
110
OUT1
= I
OUT2
=
A
V
OUT2
= +25°C,
V
OUT1
I
I
LX2 5V/DIV
L2
L1
LX1 5V/DIV
PG 5V/DIV
PG 5V/DIV
0.5V/DIV
0.5A/DIV
0.5A/DIV
1V/DIV
May 2, 2011
FN7849.0