7
FN9044.2
August 9, 2006
PROTECTION
Thermal Shutdown Rising - 150 - °C
Hysteresis - 20 - °C
NOTES:
2. Specifications at -40°C and 85°C are guaranteed by design, not production tested.
3. In normal operation, where the device is supplied with voltage on the V
IN
pin, the VCC_5V pin provides a 5V output capable of 60mA (min).
When the VCC_5V pin is used as a 5V supply input, the internal LDO regulator is disabled and the V
IN
input pin must be connected to the
VCC_5V pin. (Refer to the Pin Descriptions section for more details.)
4. This is the total shutdown current with V
IN
= VCC_5V = PVCC = 5V.
5. Operating current is the supply current consumed when the device is active but not switching. It does not include gate drive current.
6. The peak-to-peak sawtooth amplitude is production tested at 12V only; at 5V this parameter is guaranteed by design.
7. Guaranteed by design; not production tested.
8. Not production tested; guaranteed by characterization only.
9. Guaranteed by design. The full scale current of 32µA is recommended for optimum current sample and hold operation. See the Feedback Loop
Compensation Section below.
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
Schematic. V
IN
= 5.6V to 24V, or VCC_5V = 5V ±10%, T
A
= -40°C to 85°C (Note 2),
Typical values are at T
A
= 25°C (Continued)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
ISL6443
8
FN9044.2
August 9, 2006
Typical Performance Curves
(Oscilloscope Plots are Taken Using the ISL6443EVAL Evaluation Board, VIN = 12V Unless Otherwise Noted.)
FIGURE 1. PWM1 LOAD REGULATION FIGURE 2. PWM2 LOAD REGULATION
FIGURE 3. REFERENCE VOLTAGE VARIATION OVER
TEMPERATURE
FIGURE 4. SOFT-START WAVEFORMS WITH PGOOD
FIGURE 5. PWM1 WAVEFORMS FIGURE 6. PWM2 WAVEFORMS
3.3
3.32
3.33
3.35
3.38
3.39
3.4
01 2.53.5
LOAD CURRENT (A)
PWM1 OUTPUT VOLTAGE (V)
4.50.5 1.5 2 3 4
3.37
3.36
3.34
3.31
3.3
3.32
3.33
3.35
3.38
3.39
3.4
01 2.53.5
LOAD CURRENT (A)
PWM2 OUTPUT VOLTAGE (V)
4.50.5 1.5 2 3 4
3.37
3.36
3.34
3.31
-40 -20 20 40 80
0.75
0.81
0.85
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
0.78
0.83
0.8
0.77
0
60
0.84
0.82
0.79
0.76
PGOOD
5V/DIV
V
OUT3
2V/DIV
V
OUT2
2V/DIV
V
OUT1
2V/DIV
V
OUT1
20mV/DIV, AC COUPLED
I
L1
0.5A/DIV, AC COUPLED
PHASE1
10V/DIV
V
OUT2
20mV/DIV, AC COUPLED
I
L2
0.5A/DIV, AC COUPLED
PHASE2
10V/DIV
ISL6443
9
FN9044.2
August 9, 2006
FIGURE 7. LOAD TRANSIENT RESPONSE VOUT1 (3.3V) FIGURE 8. LOAD TRANSIENT RESPONSE VOUT2 (3.3V)
FIGURE 9. PWM SOFT-START WAVEFORM
FIGURE 10. OVERCURRENT HICCUP MODE OPERATION
FIGURE 11. PWM1 EFFICIENCY vs LOAD (3.3V), VIN = 12V FIGURE 12. PWM2 EFFICIENCY vs LOAD (3.3V), VIN = 12V
Typical Performance Curves (Continued)
(Oscilloscope Plots are Taken Using the ISL6443EVAL Evaluation Board, VIN = 12V Unless Otherwise Noted.)
V
OUT1
200mV/DIV
I
OUT1
1A/DIV
AC COUPLED
V
OUT2
200mV/DIV
AC COUPLED
I
OUT2
1A/DIV
VCC_5V 1V/DIV
V
OUT1
1V/DIV
V
OUT1
2V/DIV
I
L1
2A/DIV
SS1 2V/DIV
60
70
80
90
100
01
LOAD CURRENT (A)
PWM1 EFFICIENCY (%)
234
60
70
80
90
100
01
LOAD CURRENT (A)
PWM2 EFFICIENCY (%)
234
ISL6443

ISL6443IRZ-TK

Mfr. #:
Manufacturer:
Renesas / Intersil
Description:
Switching Controllers DL PWM CNTRLR LINEAR CONT 300KHZ 5
Lifecycle:
New from this manufacturer.
Delivery:
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