ISL9440AIRZ Intersil, ISL9440AIRZ Datasheet - Page 11

• Manufacturer Part Number: ISL9440AIRZ
• Description: IC CTRLR PWM OUT-OF-PHASE 32-QFN
• Manufacturer: Intersil

Specifications of ISL9440AIRZ

• Pwm Type: Current Mode
• Number Of Outputs: 4
• Frequency - Max: 678kHz
• Duty Cycle: 86%
• 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: 678kHz
• Rohs Compliant: YES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Performance Curves
(Oscilloscope Plots are Taken Using the ISL9440EVAL1Z Evaluation Board, VIN = 12V Unless Otherwise Noted.)
FIGURE 10. VIN FALLING TO PGOOD FALLING DELAY TIME
CH1
CH3
CH4
0.2ms/DIV
5.10
5.10
5.09
5.09
5.08
5.08
5.07
5.07
5.06
5.06
5.05
100µs/DIV
FIGURE 8. PWM SOFT-START WAVEFORMS
0.0
FIGURE 6. PWM3 LOAD REGULATION
PGOOD, 5V/DIV, CH4
RST, 5V/DIV, CH3
1.0
LOAD CURRENT (A)
11
2.0
VIN, 1V/DIV, CH1
(Continued)
V
3.0
OUT4
ISL9440, ISL9440A, ISL9441
V
V
V
OUT1
OUT3
OUT2
(LDO) 1V/DIV
1V/DIV
1V/DIV
1V/DIV
4.0
CH3
CH4
CH1
FIGURE 7. PWM3 EFFICIENCY vs LOAD (V
FIGURE 9. OUTPUT RIPPLE UNDER MAXIMUM LOAD
100
5µs/DIV
FIGURE 11. PGOOD FALLING TO RST FALLING
95
90
85
80
75
70
65
60
10µs/DIV
0. 0
1 DUAL SO-8 MOSFET (IRF7907) FOR UPPER
AND LOWER MOSFETS
(I
O1
= I
V
V
OUT4
V
V
O1
OUT3
OUT1
OUT2
1.0
50mV/DIV, AC COUPLED
= 6A, I
50mV/DIV, AC COUPLED
50mV/DIV, AC COUPLED
50mV/DIV, AC COUPLED
LOAD CURRENT (A)
O3
= 2A, I
2.0
PGOOD, 5V/DIV, CH4
VIN, 1V/DIV, CH1
RST, 5V/DIV, CH3
O4
= 0.5A)
O
3.0
= 5V), V
December 5, 2007
IN
FN6383.1
= 12V,
4. 0