ISL6308A Datasheet, PDF (5/28 Pages) Intersil Corporation – Three-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers

ISL6308A
Absolute Maximum Ratings
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V
Supply Voltage, PVCC . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +15V
Absolute Boot Voltage, V_BOOT . . . . . . . . GND - 0.3V to GND + 36V
Phase Voltage, V_PHASE . . . . . . . . GND - 0.3V to 15V (PVCC = 12)
GND - 8V (<400ns, 20µJ) to 24V (<200ns, V_BOOT-PHASE = 12V)
Upper Gate Voltage, V_UGATE . . . . V_PHASE - 0.3V to V_BOOT + 0.3V
V_PHASE - 3.5V (<100ns Pulse Width, 2µJ) to V_BOOT + 0.3V
Lower Gate Voltage, V_LGATE. . . . . . . . GND - 0.3V to PVCC + 0.3V
GND - 5V (<100ns Pulse Width, 2µJ) to PVCC+ 0.3V
Input, Output, or I/O Voltage . . . . . . . . . GND - 0.3V to VCC + 0.3V
Thermal Information
Thermal Resistance
θ_JA (°C/W) θ_JC (°C/W)
QFN Package (Notes 1, 2) . . . . . . . . . .
32
3.5
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
VCC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V ±5%
PVCC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . +5V to 12V ±5%
Ambient Temperature (ISL6308ACRZ) . . . . . . . . . . . . 0°C to +70°C
Ambient Temperature (ISL6308AIRZ) . . . . . . . . . . . .-40°C to +85°C
CAUTION: Stress above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational section of this specification is not implied.
NOTES:
1. θ_JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2. For θ_JC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
Recommended Operating Conditions, Unless Otherwise Specified. Parameters with MIN and/or MAX limits are
100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are
not production tested.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNITS
BIAS SUPPLY AND INTERNAL OSCILLATOR
Input Bias Supply Current
Gate Drive Bias Current
VCC POR (Power-On Reset) Threshold
I_VCC; ENLL = high
I_PVCC; ENLL = high; all gate outputs open,
F_sw = 250kHz
VCC Rising
12
15
18
mA
0.4
0.8
1.2
mA
4.25
4.38
4.47
V
VCC Falling
3.75
3.88
4.00
V
PVCC POR (Power-On Reset) Threshold
PVCC Rising
4.25
4.38
4.47
V
PVCC Falling
3.75
3.88
4.00
V
Oscillator Frequency
Fsw
225
250
275 kHz
Oscillator Ramp Amplitude (Note 3)
Maximum Duty Cycle (Note 3)
V_P-P
-
1.50
-
V
-
66.6
-
%
CONTROL THRESHOLDS
ENLL Rising Threshold
0.595 0.630 0.670 V
ENLL Hysteresis
28
35
43
mV
ENLL Pull-Up current
ENLL = 1V
-0.5
-1.4
-3.0 µA
COMP Shutdown Threshold
COMP Falling
0.1
0.25
0.4
V
REFERENCE AND DAC
System Accuracy (DAC = 0.6V, 0.9V)
DROOP connected to IREF
-0.8
-
0.8
%
System Accuracy (DAC = 1.2V, 1.50V)
DROOP connected to IREF
-0.5
-
0.5
%
DAC Input Low Voltage (REF0, REF1)
-
-
0.4
V
DAC Input High Voltage (REF0, REF1)
0.8
-
-
V
Minimum External Reference (Note 4)
REF pin input
-
0.6
-
V
5
FN6669.0
September 9, 2008