ISL78235 Datasheet, PDF (11/20 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. (Continued)
PHASE 1V/DIV
PHASE 1V/DIV
5ns/DIV
FIGURE 29. JITTER AT NO LOAD (SYNC = VDD)
PHASE 5V/DIV
C_OUT = 4x22µF
V_OUT 20mV/DIV AC
5ns/DIV
FIGURE 30. JITTER AT 5A LOAD (SYNC = VDD)
PHASE 5V/DIV
C_OUT = 4x22µF
V_OUT 20mV/DIV AC
I_PHASE 1A/DIV AC
20ms/DIV
FIGURE 31. STEADY STATE AT NO LOAD (SYNC = GND)
PHASE 5V/DIV
I_PHASE 1A/DIV AC
200ns/DIV
FIGURE 32. STEADY STATE AT NO LOAD (SYNC = VDD)
C_OUT = 4x22µF
V_OUT 20mV/DIV AC
I_PHASE 1A/DIV AC
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200ns/DIV
FIGURE 33. STEADY STATE AT 5A (SYNC = VDD)
FN8713.2
July 1, 2015