ISL78233 Datasheet, PDF (11/18 Pages) Intersil Corporation – 3A and 4A Compact Synchronous Buck Regulators

ISL78233, ISL78234
Typical Operating Performance Unless otherwise noted, operating conditions are: T_A = +25°C, V_VIN = 5V,
EN = V_IN, SYNC = V_IN, L = 1.0µH, C₁ = 22µF, C₂ = 2 x 22µF, I_OUT = 0A to 4A. (Continued)
V_OUT RIPPLE 100mV/DIV
I_LOAD 2A/DIV
200µs/DIV
FIGURE 27. LOAD TRANSIENTS (PWM)
I_LOAD 2A/DIV
V_OUT RIPPLE 100mV/DIV
200µs/DIV
FIGURE 28. LOAD TRANSIENTS (PFM)
V_OUT 1V/DIV
PHASE 5V/DIV
I_L 2A/DIV
PG 5V/DIV
4µs/DIV
FIGURE 29. OUTPUT SHORT CIRCUIT
V_OUT 1V/DIV
I_L 5A/DIV
PG 5V/DIV
40µs/DIV
FIGURE 30. OVERCURRENT PROTECTION
PHASE 5V/DIV
V_OUT 2V/DIV
I_L 5A/DIV
PG 5V/DIV
20µs/DIV
FIGURE 31. OVERVOLTAGE PROTECTION
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V_OUT 1V/DIV
PG 2V/DIV
20ms/DIV
FIGURE 32. OVER-TEMPERATURE PROTECTION
FN8359.5
April 23, 2015