ISL78236 Datasheet, PDF (10/24 Pages) Intersil Corporation – Dual 3A Current Sharing 2.5MHz High Efficiency Synchronous Buck Regulator

ISL78236
Typical Operating Performance for Dual PWM Operation
Unless otherwise noted, operating conditions are: T_A = +25°C; V_OUT1 = 1.8V; V_OUT2 = 1.8V; I_OUT1 = 0A to 3A; I_OUT2 = 0A to 3A, L1 = L2 = 0.6µH,
C_OUT1 = 2x22µF, C_OUT2 = 2x22µF, F_SW = 2.5MHz.
100
100
2.5V_OUT
2.5V_OUT
3.3V_OUT
90
90
80
1.2V_OUT
1.5V_OUT
1.8V_OUT
80
70
70
1.8V_OUT
60
60
50
50
40
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 5. EFFICIENCY, V_IN = 3.3V, T_A = +25°C
40
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 6. EFFICIENCY, V_IN = 5V, T_A = +25°C
1.8
1.6
T = +125°C
1.4
T = +105°C
1.2
T = +25°C
1.0
T = -40°C
0.8
0.6
0.4
0.2
0
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 7. POWER DISSIPATION, V_IN = 3.3V, V_OUT = 1.8V
1.8
1.6
T = +125°C
1.4
T = +105°C
1.2
T = +25°C
1.0
T = -40°C
0.8
0.6
0.4
0.2
0
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT LOAD (A)
FIGURE 8. POWER DISSIPATION, V_IN = 5V, V_OUT = 1.8V
0.20
V_OUT
0.15
REFERENCED FROM
V_OUT AT V_IN = 2.7V
0A LOAD
0.10
6A LOAD
0.05
3A LOAD
0.00
-0.05
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
INPUT VOLTAGE (V)
FIGURE 9. LINE REGULATION, V_OUT = 1.8V, T_A = +25°C
0
-1
-2
5V_IN
-3
-4
-5
V_OUT
-6 ^{REFERENCED FROM}
V_OUT AT I_OUT = 0A
3.3V_IN
-7
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT CURRENT (A)
FIGURE 10. LOAD REGULATION, V_OUT = 1.8V, T_A = +25°C
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FN8624.0
April 28, 2014