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ISL78235R5668 Datasheet, PDF (9/20 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. (Continued)
1.200
1.204
1.198
1.196
1.194
1.192
1.190
1.188
1.186
1.202
1.200
1.198
1.196
1.194
1.192
1.184
0
1
2
3
4
5
6
7
8
OUTPUT LOAD (A)
FIGURE 11. VOUT REGULATION vs LOAD (VIN = 3V)
1.190
0
1
2
3
4
5
6
7
8
OUTPUT LOAD (A)
FIGURE 12. VOUT REGULATION vs LOAD (VIN = 5V)
75
70
T = +125°C
65
60
T = +25°C
55
T = -40°C
50
3.0
3.5
4.0
4.5
5.0
5.5
VIN (V)
FIGURE 13. PHASE MINIMUM ON-TIME vs VIN
PHASE 5V/DIV
VOUT 1V/DIV
SS = GND
COUT = 4 x 22µF
EN 2V/DIV
PG 5V/DIV
500µs/DIV
FIGURE 14. EN START-UP AT NO LOAD (SYNC = GND)
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PHASE 5V/DIV
VOUT 1V/DIV
EN 2V/DIV
SS = GND
COUT = 4 x 22µF
PG 5V/DIV
500µs/DIV
FIGURE 15. EN START-UP AT NO LOAD (SYNC = VDD)
FN8769.1
January 21, 2016
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