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| ISL78235 Datasheet, PDF (10/20 Pages) Intersil Corporation – 5A Automotive Synchronous Buck Regulator | |||
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ISL78235
Typical Operating Performance Unless otherwise noted, operating conditions are: TA = +25°C, VIN = VDD = 5V,
VOUT = 1.8V, EN = VDD, SYNC = VDD, L = 0.68µH, fSW = 2MHz, CIN = 2 x 22µF, COUT = 2 x 22µF, IOUT = 0A to 5A. (Continued)
IOUT 5A/DIV
IOUT 5A/DIV
VOUT 1V/DIV
SS = GND
COUT = 4x22µF
VOUT 1V/DIV
SS = GND
COUT = 4x22µF
EN 2V/DIV
PG 5V/DIV
500µs/DIV
FIGURE 23. EN START-UP AT 5A LOAD (SYNC = GND)
EN 2V/DIV
PG 5V/DIV
500µs/DIV
FIGURE 24. EN START-UP AT 5A LOAD (SYNC = VDD)
IOUT 5A/DIV
VOUT 1V/DIV
SS = GND
COUT = 4x22µF
VIN 5V/DIV
PG 5V/DIV
500µs/DIV
FIGURE 25. VIN START-UP AT 5A LOAD (SYNC = GND)
IOUT 5A/DIV
VOUT 1V/DIV
EN 2V/DIV
SS = GND
COUT = 4x22µF
PG 5V/DIV
100µs/DIV
FIGURE 27. EN SHUT-DOWN AT 5A LOAD (SYNC = GND)
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IOUT 5A/DIV
VOUT 1V/DIV
SS = GND
COUT = 4x22µF
VIN 5V/DIV
PG 5V/DIV
500µs/DIV
FIGURE 26. VIN START-UP AT 5A LOAD (SYNC = VDD)
IOUT 5A/DIV
VOUT 1V/DIV
EN 2V/DIV
SS = GND
COUT = 4x22µF
PG 5V/DIV
100µs/DIV
FIGURE 28. EN SHUT-DOWN AT 5A LOAD (SYNC = VDD)
FN8713.2
July 1, 2015
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