isl6622 Intersil Corporation, isl6622 Datasheet - Page 10

• Manufacturer Part Number: isl6622
• Description: Vr11.1, 4-phase Pwm Controller With Light Load Efficiency Enhancement And Load Current Monitoring
• Manufacturer: Intersil Corporation

components such as lead inductances and PCB
capacitances are also not taken into account. Figure 8
provides a visual reference for this phenomenon and its
potential solution.
ISL6622
ISL6622A
ISL6622B
FIGURE 8. GATE TO SOURCE RESISTOR TO REDUCE
UVCC
POWER RAILS
20kΩ
UPPER MOSFET MILLER COUPLING
UGATE
PHASE
SOIC
SOIC
SOIC
DFN
DFN
DFN
BOOT
10
C
BOOT
G
R
G
C
GD
Programmable
C
PSI = LOW
TABLE 2. ISL6622 FAMILY BIAS OPTIONS
GS
5.75V
VIN
Q
S
D
UPPER
Programmable
C
DS
Own Rail
Own Rail
LVCC
5.75V
ISL6622
PSI = HIGH
Gate Drive Voltage Options
Intersil provides various gate drive voltage options in the
ISL6622 product family, as shown in Table 2.
The ISL6622 can drop the low-side MOSFET’s gate drive
voltage when operating in DEM, while the high-side FET’s
gate drive voltage of the DFN package can be connected to
VCC or LVCC.
The ISL6622A allows the low-side MOSFET(s) to operate
from an externally-provided rail as low as 5V, eliminating the
LDO losses, while the high-side MOSFET’s gate drive
voltage of the DFN package can be connected to VCC or
LVCC.
The ISL6622B sets the low-side MOSFET’s gate drive
voltage at a fixed, programmable LDO level, while the
high-side FETs’ gate drive voltage of the DFN package can
be connected to VCC or LVCC.
11.2V
11.2V
Own Rail
Own Rail
Own Rail
UVCC
VCC
VCC
VCC
Operating Voltage Ranges
from 6.8V to 13.2V
VCC
October 30, 2008
FN6470.2