English
Language : 

ISL78228_15 Datasheet, PDF (6/18 Pages) Intersil Corporation – Dual 800mA Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator
◁
ISL78228
Typical Operating Performance Unless otherwise noted, operating conditions are: TA = +25°C, VIN = 2.75V to
5.5V, EN = VIN, L1 = L2 = 2.2µH, C1 = 10µF, C2 = C4 = 10µF, VOUT1 = 2.5V, VOUT2 = 1.8V, IOUT1 = IOUT2 = 0A to 800mA.
100
100
90
90
80
2.5VOUT
70
60
1.2VOUT
50
1.5VOUT
1.8VOUT
80
2.5VOUT
70
1.2VOUT
60
50
1.8VOUT
1.5VOUT
40 0.0 0.1 0.2
0.3
0.4
0.5
0.6
0.7
0.8
OUTPUT LOAD (A)
FIGURE 2. EFFICIENCY vs LOAD 2.25MHz 3.3VIN PWM
400.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
OUTPUT LOAD (A)
FIGURE 3. EFFICIENCY vs LOAD 2.25MHz 3.3VIN PFM
100
90
80
2.5VOUT
70
3.3VOUT
1.5VOUT
60
1.2VOUT
1.8VOUT
50
40
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
OUTPUT LOAD (A)
FIGURE 4. EFFICIENCY vs LOAD 2.25MHz 5VIN PWM
100
90
80
70
1.5VOUT
60
1.2VOUT
1.8VOUT
50
3.3VOUT
2.5VOUT
40
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
OUTPUT LOAD (A)
FIGURE 5. EFFICIENCY vs LOAD 2.25MHz 5VIN PFM
0.30
0.25
0.20
3.3VIN - PWM
5VIN - PWM
0.15
0.10
5VIN - PFM
0.05
3.3VIN - PFM
0.00
0.0
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT LOAD (A)
0.7 0.8
FIGURE 6. POWER DISSIPATION vs LOAD 2.25MHz, 1.8VOUT PWM
1.23
1.22
5VIN PFM
1.21
5VIN PWM
1.20
1.19
1.18
3.3V VIN PWM
3.3V VIN PFM
1.17
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
OUTPUT LOAD (A)
FIGURE 7. VOUT REGULATION vs LOAD 2.25MHz, 1.2VOUT PFM
Submit Document Feedback
6
FN7849.3
April 13, 2015
 ▷