ISL78228ARZ INTERSIL [Intersil Corporation], ISL78228ARZ Datasheet - Page 6

• 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.
IN
100
FIGURE 6. POWER DISSIPATION vs LOAD 2.25MHz 1.8V
= 2.75V to 5.5V, EN = V
100
0.30
0.25
0.20
0.15
0.10
0.05
0.00
90
80
70
60
50
40
90
80
70
60
50
40
FIGURE 2. EFFICIENCY vs LOAD 2.25MHz 3.3V
0.0
FIGURE 4. EFFICIENCY vs LOAD 2.25MHz 5V
0.0
0.0
3.3V
2.5V
0.1
3.3V
0.1
IN
0.1
- PWM MODE
OUT
1.2V
OUT
2.5V
5V
0.2
5V
0.2
0.2
- PWM
IN
OUT
IN
- PWM
OUT
OUTPUT LOAD (A)
OUTPUT LOAD (A)
- PFM MODE
1.2V
OUTPUT LOAD (A)
- PWM MODE
IN
0.3
0.3
- PWM
0.3
, L
- PWM
OUT
1
6
= L
1.5V
0.4
0.4
0.4
- PWM
2
OUT
= 2.2µH, C
1.5V
0.5
0.5
0.5
- PWM
3.3V
OUT
1.8V
1.8V
0.6
0.6
IN
0.6
- PWM
1
OUT -
OUT
= 10µF, C
- PFM
IN
0.7
PWM
IN
0.7
0.7
- PWM
PWM
PWM
OUT
2
0.8
0.8
ISL78228
0.8
= C
PWM
4
= 10µF, V
Unless otherwise noted, operating conditions are: T
OUT1
FIGURE 7. V
100
100
1.23
1.22
1.21
1.20
1.19
1.18
1.17
90
80
70
60
50
40
90
80
70
60
50
40
FIGURE 3. EFFICIENCY vs LOAD 2.25MHz 3.3V
0.0
= 2.5V, V
FIGURE 5. EFFICIENCY vs LOAD 2.25MHz 5V
0.0
0.0
1.5V
2.5V
1.8V
5V
OUT
0.1
1.2V
0.1
OUT
IN
0.1
OUT
OUT2
OUT
3.3V V
- PFM
PFM MODE
OUT
REGULATION vs LOAD 2.25MHz 1.2V
- PFM
0.2
0.2
- PFM
= 1.8V, I
0.2
- PFM
IN
OUTPUT LOAD (A)
1.2V
OUTPUT LOAD (A)
0.3
0.3
PWM
OUTPUT LOAD (A)
5V
0.3
OUT1
1.8V
OUT
IN
0.4
0.4
OUT
PWM MODE
- PFM
= I
0.4
2.5V
OUT2
- PFM
0.5
0.5
OUT
0.5
3.3V V
=
- PFM
1.5V
A
3.3V
0.6
0.6
= +25°C,
0.6
IN
OUT
OUT
IN
PFM
IN
0.7
0.7
PFM
- PFM
- PFM
OUT
PFM
0.7
May 2, 2011
FN7849.0
PFM
0.8
0.8
0.8