ISL9444IRZ-T7A Intersil, ISL9444IRZ-T7A Datasheet - Page 12

• Manufacturer Part Number: ISL9444IRZ-T7A
• Description: ISL9444 Triple, Step- Down PWM Controller IMVP-6. 40 Ld MLFP
• Manufacturer: Intersil
• Series: -r

Specifications of ISL9444IRZ-T7A

• Pwm Type: Current Mode
• Number Of Outputs: 3
• Frequency - Max: 1.32MHz
• Duty Cycle: -
• Voltage - Supply: 4.5 V ~ 28 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: 40-VFQFN Exposed Pad
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Typical Performance Curves of ISL9444
Evaluation Board, V
FIGURE 6. NORMALIZED OUTPUT VOLTAGE vs VOLTAGE ON
120
100
33.0
32.5
32.0
31.5
31.0
30.5
30.0
FIGURE 2. SHUTDOWN CURRENT vs TEMPERATURE
80
60
40
20
6
5
4
3
2
1
0
0
0
-40
0
CHANNEL 2/3
FIGURE 4. VCC_5V vs LOAD REGULATION
SOFT-START PIN
0.5
IN
-20
50
= 12V, VOUT1 = 1.05V, VOUT2 = 3.3V, VOUT3 = 1.8V unless otherwise noted.
1.0
VCC_5V LOAD CURRENT (mA)
SOFT-START PIN VOLTAGE (V)
0
1.5
TEMPERATURE (°C)
100
12
2.0
20
2.5
CHANNEL 1
150
40
3.0
60
3.5
200
80
4.0
250
4.5
100
ISL9444
FIGURE 5. SOFT-START PIN CHARGING CURRENT vs VOLTAGE ON
FIGURE 7. PHASE NODE WAVEFORMS. ALL OUTPUT VOLTAGES
FIGURE 3. QUIESCENT CURRENT vs TEMPERATURE
5.3
5.1
4.9
4.7
4.5
4.3
2.0
1.6
1.2
0.8
0.4
Oscilloscope plots are taken using the ISL9444EVAL1Z
-40
0
0
SOFT-START PIN
SET AT 1.05V
0.5
-20
V
CHANNEL 3
1.0
SOFT-START PIN VOLTAGE (V)
IN
= 28V
0
TEMPERATURE (°C)
1.5
20
2.0
V
IN
2.5
40
= 4.5V
o
TIME @ 1µs/DIV
CHANNEL 1/2
3.0
60
PWM2
3.5
PWM1
PWM3
80
4.0
July 19, 2011
FN7665.1
100
4.5