isl9440b Intersil Corporation, isl9440b Datasheet - Page 14

• Manufacturer Part Number: isl9440b
• Description: Triple Step-down Pwm And Single Linear Controller With Programmable Soft-start
• Manufacturer: Intersil Corporation

Typical Performance Curves
(Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board, V
FIGURE 22. PWM2 OUTPUT RIPPLE UNDER MAX LOAD
FIGURE 24. PWM3 OUTPUT RIPPLE UNDER MAX LOAD
FIGURE 26. PWM1 OVERCURRENT PROTECTION ENTRY
(V
BANDWIDTH)
(V
BANDWIDTH)
WAVEFORM
IN
IN
EN/SS1, 5.0V/DIV
V
PGOOD, 5.0V/DIV
I
OUT
= 23V, I
V
= 23V, I
OUT
OUT3
, 20A/DIV
, 5.0V/DIV
(AC), 50mV/DIV
V
O1
O1
OUT2
= I
= I
(AC), 50mV/DIV
14
O2
O2
= 15A, I
= 15A, I
O3
O3
(Continued)
= 12A, FULL
= 12A, FULL
2.0
2.0
µs
µs
ISL9440B, ISL9440C
/DIV
/DIV
IN
FIGURE 23. PWM2 LOAD TRANSIENT RESPONSE
FIGURE 25. PWM3 LOAD TRANSIENT RESPONSE
FIGURE 27. PWM1 OVERCURRENT PROTECTION
= 19V Unless Otherwise Noted).
(LOAD STEP FROM 3.75A TO 11.25A)
(LOAD STEP FROM 3A TO 9A)
RECOVERY WAVEFORM
V
V
OUT3
OUT2
I
STEP
I
STEP
(AC), 200mV/DIV
(AC), 100mV/DIV
, 5.0A/DIV
, 5.0A/DIV
V
I
EN/SS1, 5.0V/DIV
PGOOD, 5.0V/DIV
OUT
OUT
, 20A/DIV
, 5.0V/DIV
50
50
µs
µs
January 15, 2009
/DIV
/DIV
FN6799.0