ISL6322G Datasheet, PDF (6/39 Pages) Intersil Corporation – Two-Phase Buck PWM Controller with Integrated MOSFET Drivers, I2C Interface and Phase Dropping

ISL6322G
Absolute Maximum Ratings
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V
Supply Voltage, PVCC . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +15V
BOOT Voltage, V_BOOT . . . . . . . . . . . . . . GND - 0.3V to GND + 36V
BOOT to PHASE Voltage, V_{BOOT - PHASE} . . . . . -0.3V to 15V (DC)
-0.3V to 16V (<10ns, 10µJ)
PHASE Voltage, V_PHASE . . . . . . . GND - 0.3V to 15V (PVCC = 12)
GND - 8V (<400ns, 20µJ) to 24V (<200ns, V_{BOOT - PHASE} = 12V)
UGATE 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
LGATE 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) . . . . . . . . . .
27
2.5
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
ISL6322GCRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
ISL6322GIRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
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.
3. Limits established by characterization and are not production tested.
Electrical Specifications Recommended Operating Conditions, 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 SUPPLIES
Input Bias Supply Current
Gate Drive Bias Current - PVCC Pin
VCC POR (Power-On Reset) Threshold
I_VCC; EN = high
I_PVCC; EN = high
VCC rising
15
20
25
mA
2
4.3
6
mA
4.25
4.38
4.50
V
VCC falling
3.75
3.88
4.00
V
PVCC POR (Power-On Reset) Threshold
PVCC rising
4.25
4.38
4.50
V
PVCC falling
3.60
3.88
4.00
V
PWM MODULATOR
Oscillator Frequency Accuracy, f_SW
Adjustment Range of Switching Frequency
R_T = 100kΩ (±0.1%)
(Note 3)
225
250
275 kHz
0.08
1.0 MHz
Oscillator Ramp Amplitude, V_P-P
CONTROL THRESHOLDS
(Note 3)
1.50
V
EN Rising Threshold
0.85
V
EN Hysteresis
110
mV
EN_PH2 Input High Voltage
3.0
V
EN_PH2 Input Low Voltage
2.0
V
COMP Shutdown Threshold
COMP falling
0.1
0.2
0.3
V
REFERENCE AND DAC
System Accuracy (1.000V to 1.600V)
-0.5
0.5
%
System Accuracy (0.600V to 1.000V)
-1.0
1.0
%
System Accuracy (0.375V to 0.600V)
-2.0
2.0
%
DAC Input Low Voltage (VR10, VR11)
0.4
V
6
FN6715.0
May 22, 2008