ISL9440BIRZ-T Intersil, ISL9440BIRZ-T Datasheet - Page 14

• Manufacturer Part Number: ISL9440BIRZ-T
• Description: IC CTRLR PWM OUT-OF-PHASE 32-QFN
• Manufacturer: Intersil

Specifications of ISL9440BIRZ-T

• Pwm Type: Current Mode
• Number Of Outputs: 4
• Frequency - Max: 340kHz
• Duty Cycle: 93%
• Voltage - Supply: 4.5 V ~ 24 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Frequency-max: 340kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Performance Curves
(Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board, V
FIGURE 24. PWM3 OUTPUT RIPPLE UNDER MAX LOAD
FIGURE 26. PWM1 OVERCURRENT PROTECTION ENTRY
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2.45
0
FIGURE 28. LDO LOAD REGULATION
(V
BANDWIDTH)
WAVEFORM
V
IN
IN
= 24V
EN/SS1, 5.0V/DIV
V
PGOOD, 5.0V/DIV
I
OUT
V
= 23V, I
OUT
0.2
OUT3
, 20A/DIV
, 5.0V/DIV
V
(AC), 50mV/DIV
IN
O1
LOAD CURRENT (A)
V
= 4.5V
IN
= I
0.4
= 12V
14
O2
= 15A, I
0.6
O3
(Continued)
= 12A, FULL
0.8
2.0
µs
ISL9440B, ISL9440C
/DIV
1.0
IN
FIGURE 25. PWM3 LOAD TRANSIENT RESPONSE
FIGURE 27. PWM1 OVERCURRENT PROTECTION
FIGURE 29. LDO LOAD TRANSIENT
= 19V Unless Otherwise Noted).
(LOAD STEP FROM 3A TO 9A)
RECOVERY WAVEFORM
(LOAD STEP FROM 0.1A TO 0.6A)
V
OUT3
I
STEP
V
OUT
(AC), 200mV/DIV
I
STEP
, 5.0A/DIV
(AC), 20mV/DIV
, 0.5A/DIV
V
I
EN/SS1, 5.0V/DIV
PGOOD, 5.0V/DIV
OUT
OUT
, 20A/DIV
, 5.0V/DIV
100
50
µs
µs
/DIV
/DIV
June 24, 2010
FN6799.3