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ISL78235R5668 Datasheet, PDF (8/20 Pages) Intersil Corporation – Automotive 5A Synchronous Buck Regulator
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ISL78235R5668
Typical Operating Performance Unless otherwise noted, operating conditions are: TA = +25°C, VIN = VDD = 3V,
VOUT = 1.0V, EN = VDD, SYNC = VDD, L = 0.33µH, fSW = 2MHz, CIN = 4 x 22µF, COUT = 4 x 47µF, IOUT = 0A to 8A.
100
100
90
90
80
80
70 VOUT = 1V; T = +25°C
VOUT = 1V; T = -40°C
60
VOUT = 1.2V; T = -40°C
50
VOUT = 1.2V; T = +25°C
70
60
VOUT = 1V; T = +105°C
VOUT = 1.2V; T = +105°C
50
40 0
1
2
3
4
5
6
7
8
OUTPUT LOAD (A)
FIGURE 5. EFFICIENCY vs LOAD (VIN = 2.7V)
40 0
1
2
3
4
5
6
7
8
OUTPUT LOAD (A)
FIGURE 6. EFFICIENCY vs LOAD (VIN = 3V)
7
VOUT = 1.2V; T = +25°C
6
VOUT = 1V; T = +25°C
5
VOUT = 1.2V; T = -40°C
4
3
VOUT = 1V; T = -40°C
2
1
0
0
1
2
3
4
5
6
7
8
OUTPUT LOAD (A)
FIGURE 7. POWER DISSIPATION vs LOAD (VIN = 2.7V)
7
6
VOUT = 1.2V; T = +105°C
5
VOUT = 1V; T = +105°C
4
3
2
1
00
1
2
3
4
5
6
7
8
OUTPUT LOAD (A)
FIGURE 8. POWER DISSIPATION vs LOAD (VIN = 3V)
100
90
80
VOUT = 1.2V; T = -40°C
70
VOUT = 1.2V; T = +25°C
60
VOUT = 1.2V; T = +105°C
50
40
0
1
2
3
4
5
6
7
8
OUTPUT LOAD (A)
FIGURE 9. EFFICIENCY vs LOAD (VIN = 5V)
4.0
3.5
VOUT = 1.2V; T = +105°C
3.0
2.5
VOUT = 1.2V; T = +25°C
2.0
VOUT = 1.2V; T = -40°C
1.5
1.0
0.5
0
0
1
2
3
4
5
6
7
8
OUTPUT LOAD (A)
FIGURE 10. POWER DISSIPATION vs LOAD (VIN = 5V)
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FN8769.1
January 21, 2016
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