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ISL78235 Datasheet, PDF (12/20 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)
VOUT 100mV/DIV AC
COUT = 4x22µF
VOUT 100mV/DIV AC
COUT = 4x22µF
I_LOAD 2A/DIV
RCOMP = 154kΩ
CCOMP = 220pF
I_LOAD 2A/DIV
RCOMP = 154kΩ
CCOMP = 220pF
500µs/DIV
FIGURE 34. LOAD TRANSIENT 0A TO 5A; 0.5A/µs (SYNC = GND)
500µs/DIV
FIGURE 35. LOAD TRANSIENT 0A TO 5A; 0.5A/µs (SYNC = VDD)
VOUT
PG
I_PHASE
PHASE
FIGURE 36. OUTPUT SHORT-CIRCUIT
CSS = 33nF
SS
I_PHASE
VOUT
I_LOAD
FIGURE 38. SHORT-CIRCUIT HICCUP WAVEFORM
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PHASE
PG
VOUT
I_PHASE
FIGURE 37. OUTPUT SHORT-CIRCUIT RECOVERY TO 1A LOAD
PHASE
LOAD = 4A TO 8A STEP
I_PHASE
VOUT
PG
FIGURE 39. OVERCURRENT PROTECTION
FN8713.2
July 1, 2015
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