ISL78228ARZ INTERSIL [Intersil Corporation], ISL78228ARZ Datasheet - Page 7

• 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 12. OUTPUT VOLTAGE REGULATION vs V
1.56
1.55
1.54
1.53
1.52
1.51
1.50
= 2.75V to 5.5V, EN = V
2.55
2.54
2.53
2.52
2.51
2.50
2.49
1.83
1.82
1.81
1.80
1.79
1.78
1.77
FIGURE 10. V
FIGURE 8. V
0.0
2.0
0.0
5V
IN
PWM MODE
2.5
0.1
0.1
5 V
PWM MODE
OUT
OUT
5V V
3.3V V
IN
3.3V V
3.3V V
3.0
0.2
0.8A LOAD PWM
0.2
REGULATION vs LOAD 2.25MHz 1.5V
PFM MODE
REGULATION vs LOAD 2.25MHz 2.5V
IN
3.3V V
IN
IN
INPUT VOLTAGE (V)
IN
PFM
OUTPUT LOAD (A)
IN
OUTPUT LOAD (A)
, L
3.5
0.3
0.3
PFM
PWM
1
PWM
7
= L
IN
4.0
2
PFM
0.4
0.4
0A LOAD PWM
= 2.2µH, C
5V V
4.5
0.5
0.5
IN
0.4A LOAD PWM
PWM
1
5.0
IN
= 10µF, C
0.6
0.6
1.8V
5.5
OUT
0.7
0.7
OUT
OUT
2
ISL78228
= C
6.0
0.8
0.8
4
= 10µF, V
Unless otherwise noted, operating conditions are: T
FIGURE 13. OUTPUT VOLTAGE REGULATION vs V
OUT1
1.84
1.83
1.82
1.81
1.80
1.79
1.78
3.42
3.40
3.38
3.36
3.34
3.32
3.30
1.83
1.82
1.81
1.80
1.79
1.78
1.77
FIGURE 11. V
FIGURE 9. V
= 2.5V, V
0.0
0.0
2.0
3.3V V
PFM MODE
0.1
0.1
2.5
3.3V V
OUT2
5V
5 V
OUT
IN
OUT
5V V
5V V
IN
IN
PWM
0.2
= 1.8V, I
0.2
REGULATION vs LOAD 2.25MHz 1.8V
3.0
IN
REGULATION vs LOAD 2.25MHz 3.3V
PWM MODE
IN
PFM MODE
IN
PFM
0A LOAD
INPUT VOLTAGE (V)
PFM
OUTPUT LOAD (A)
OUTPUT LOAD (A)
0.8A LOAD
PWM
0.3
0.3
3.5
OUT1
= I
0.4
0.4
4.0
OUT2
0.5
0.5
4.5
=
A
= +25°C,
0.4A LOAD
IN
0.6
0.6
5.0
1.8V
OUT
0.7
5.5
0.7
May 2, 2011
OUT
OUT
FN7849.0
0.8
6.0
0.8