isl9444 Intersil Corporation, isl9444 Datasheet - Page 15

• Manufacturer Part Number: isl9444
• Manufacturer: Intersil Corporation

Typical Performance Curves of ISL9444
Evaluation Board, V
FIGURE 20. PWM3 START-UP. MODE = CCM, LOAD = 0A
FIGURE 22. PWM1 OUTPUT RIPPLE, MODE = 0V (DEM)
VOUT1 @ 20mV/DIV. LOAD = 0mA
VOUT1 @ 20mV/DIV. LOAD = 100mA
VOUT1 @ 20mV/DIV. LOAD = 1000mA
TIME @ 5ms/DIV
VOUT1 @ 100mV/DIV
VOUT2 @ 100mV/DIV
VOUT3 @ 100mV/DIV
FIGURE 24. PWM LOAD TRANSIENT RESPONSE
2A
IN
= 12V, VOUT1 = 1.05V, VOUT2 = 3.3V, VOUT3 = 1.8V unless otherwise noted.
INDUCTOR CURRENT @ 2A/DIV
15
4A
PGOOD3 @ 5V/DIV
TIME @ 20µs/DIV
VOUT3 @ 1V/DIV
TKSS3 @ 2V/DIV
TIME @ 2ms/DIV
TIME @ 2µs/DIV
TIME @ 2µs/DIV
2A
ISL9444
FIGURE 25. PWM1 OCP RESPONSE. OUTPUT SHORT-CIRCUITED TO
FIGURE 21. PWM3 START-UP. MODE = DEM, LOAD = 0A
FIGURE 23. PWM1 OUTPUT RIPPLE, MODE = 5V (CCM)
VOUT1 @ 20mV/DIV. LOAD = 0mA
VOUT1 @ 20mV/DIV. LOAD = 100mA
VOUT1 @ 20mV/DIV. LOAD = 1000mA
Oscilloscope plots are taken using the ISL9444EVAL1Z
ENSS1 @ 5V/DIV
VOUT1 @ 1V/DIV
GROUND AND RELEASED.
(Continued)
PGOOD1 @ 5V/DIV
INDUCTOR CURRENT @ 2A/DIV
OUTPUT CURRENT @ 10A/DIV
PGOOD3 @ 5V/DIV
TIME @ 50ms/DIV
VOUT3 @ 1V/DIV
TIME @ 5ms/DIV
TKSS3 @ 2V/DIV
TIME @ 2µs/DIV
TIME @ 2µs/DIV
TIME @ 2µs/DIV
May 23, 2011
FN7665.0