ISL78236 Datasheet, PDF (15/24 Pages) Intersil Corporation – Dual 3A Current Sharing 2.5MHz High Efficiency Synchronous Buck Regulator

ISL78236
Typical Performance for Current Sharing PWM Operation
Unless otherwise noted, operating conditions are: T_A = +25°C; V_OUT = 1.8V, I_OUT1 + I_OUT2 = 0A to 6A, L1 = L2 = 0.6µH, C_OUT = 4x22µF, F_SW = 2.5MHz.
100
100
3.3V_OUT
90
2.5V_OUT
80
1.5V_OUT
1.2V_OUT
70
1.8V_OUT
90
80
2.5V_OUT
70
1.8V_OUT
60
60
50
50
40
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 35. EFFICIENCY vs LOAD, V_IN = 3.3V, T_A = +25°C
40
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 36. EFFICIENCY vs LOAD, V_IN = 5V, T_A = +25°C
4.0
3.5
3.0
T = +125°C
2.5
T = +105°C
2.0
T = +25°C
T = -40°C
1.5
1.0
0.5
0
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 37. POWER DISSIPATION, V_IN = 3.3V, V_OUT = 1.8V
0.40
VOUT
0.35 ^{REFERENCED FROM}
V_OUT AT V_IN = 2.7V
0.30
0.25
0.20
6A LOAD
0A LOAD
0.15
3A LOAD
0.10
0.05
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
INPUT VOLTAGE (V)
FIGURE 39. LINE REGULATION, V_OUT = 1.8V, T_A = +25°C
4.0
3.5
3.0
T = +125°C
2.5
T = +105°C
2.0
T = +25°C
1.5
T = -40°C
1.0
0.5
0
0
1
2
3
4
5
6
OUTPUT LOAD (A)
FIGURE 38. POWER DISSIPATION, V_IN = 5V, V_OUT = 1.8V
0
-1
-2
3.3V_IN
-3
-4
5V_IN
-5
-6
V_OUT
-7 _{REFERENCED FROM}
V_OUT AT I_OUT = 0A
-8
0
1
2
3
4
5
6
OUTPUT CURRENT (A)
FIGURE 40. LOAD REGULATION, V_OUT = 1.8V, T_A = +25°C
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FN8624.0
April 28, 2014