isl9440b Intersil Corporation, isl9440b Datasheet - Page 13

• 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 20. PWM1 OUTPUT RIPPLE UNDER MAX LOAD
FIGURE 16. PGOOD RISING AFTER START UP
FIGURE 18. PGOOD RISING TO RST RISING
(V
BANDWIDTH)
IN
= 23V, I
PGOOD, 5.0V/DIV
V
V
OUT2
V
OUT1
OUT1
O1
, 2.0V/DIV
, 2.0V/DIV
(AC), 50mV/DIV
= I
13
O2
= 15A, I
O3
V
OUT1
(Continued)
= 12A, FULL
PGOOD, 5.0V/DIV
RST, 5.0V/DIV
, 2.0V/DIV
V
2.0
OUT2
2.0µs/DIV
50ms/DIV
µs
, 2.0V/DIV
/DIV
ISL9440B, ISL9440C
FIGURE 19. VIN FALLING TO PGOOD FALLING DELAY TIME
IN
FIGURE 21. PWM1 LOAD TRANSIENT RESPONSE
= 19V Unless Otherwise Noted).
0.5ms/DIV
FIGURE 17. PGOOD FALLING TO RST FALLING
(LOAD STEP FROM 3.75A TO 11.25A)
V
OUT1
I
STEP
(AC), 100mV/DIV
RST , 5.0V/DIV
PGOOD, 5.0V/DIV
V
OUT1
VIN, 2.0V/DIV
, 5.0A/DIV
PGOOD, 5.0V/DIV
RST, 5.0V/DIV
V
OUT1
, 2.0V/DIV
, 2.0V/DIV
50
10
January 15, 2009
µs
µs
/DIV
/DIV
FN6799.0