ISL78235 Datasheet, PDF (7/20 Pages) Intersil Corporation – 5A Automotive Synchronous Buck Regulator

ISL78235
Typical Operating Performance Unless otherwise noted, operating conditions are: T_A = +25°C, V_IN = V_DD = 5V,
V_OUT = 1.8V, EN = V_DD, SYNC = V_DD, L = 0.68µH, f_SW = 2MHz, C_IN = 2 x 22µF, C_OUT = 2 x 22µF, I_OUT = 0A to 5A.
100
100
90
2.5V_OUT
80
1.8V_OUT
70
1.5V_{OUT 1.2VOUT}
1.0V_OUT
60
90
2.5V_OUT
80
1.8V_OUT
1.5V_OUT
1.2V_OUT
70
0.9V_OUT
60
50
50
40
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT LOAD (A)
FIGURE 5. EFFICIENCY vs LOAD (3.3V_IN; SYNC = VDD)
40
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT LOAD (A)
FIGURE 6. EFFICIENCY vs LOAD (3.3V_IN; SYNC = GND)
100
90
80
2.5V_OUT
3.3V_OUT
70
1.8V_OUT 1.5V_{OUT 1.2VOUT}
60
50
40
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT LOAD (A)
FIGURE 7. EFFICIENCY vs LOAD (5V_IN; SYNC = VDD)
100
90
80
2.5V_OUT
3.3V_OUT
1.8V_OUT
70
1.5V_{OUT 1.2VOUT}
60
50
400 _{0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0}
OUTPUT LOAD (A)
FIGURE 8. EFFICIENCY vs LOAD (5V_IN; SYNC = GND)
2.5
2.5V_OUT
2.0
1.8V_OUT
1.5
1.2V_OUT
1.0V_OUT
1.0
0.5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT LOAD (A)
FIGURE 9. POWER DISSIPATION vs LOAD (3.3V_IN; SYNC = VDD)
2.5
3.3V_OUT
2.0
2.5V_OUT
1.5
1.8V_OUT
1.2V_OUT
1.0
0.5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT LOAD (A)
FIGURE 10. POWER DISSIPATION vs LOAD (5V_IN; SYNC = GND)
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FN8713.2
July 1, 2015