ISL85415 Datasheet, PDF (13/23 Pages) Intersil Corporation – Wide VIN 500mA Synchronous Buck Regulator

ISL85415
Typical Performance Curves V_IN = 24V, V_OUT = 3.3V, F_SW = 800kHz, T_A = +25°C. (Continued)
LX 20V/DIV
V_OUT 2V/DIV
LX 20V/DIV
V_OUT 2V/DIV
EN 20V/DIV
PG 2V/DIV
500ms/DIV
FIGURE 34. SHUTDOWN IN NO LOAD, PFM
EN 20V/DIV
PG 2V/DIV
500ms/DIV
FIGURE 35. SHUTDOWN AT NO LOAD, PWM
LX 20V/DIV
V_OUT 2V/DIV
I_L 500mA/DIV
PG 2V/DIV
5ms/DIV
FIGURE 36. START-UP AT 500mA, PWM
LX 20V/DIV
V_OUT 2V/DIV
I_L 500mA/DIV
PG 2V/DIV
5ms/DIV
FIGURE 38. START-UP AT 500mA, PWM
LX 20V/DIV
V_OUT 2V/DIV
I_L 500mA/DIV
PG 2V/DIV
50µs/DIV
FIGURE 37. SHUTDOWN AT 500mA, PWM
LX 20V/DIV
V_OUT 2V/DIV
I_L 500mA/DIV
PG 2V/DIV
50µs/DIV
FIGURE 39. SHUTDOWN AT 500mA, PFM
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FN8373.0
July 15, 2013