ISL6622A Datasheet, PDF (9/11 Pages) Intersil Corporation – VR11.1 Compatible Synchronous Rectified Buck MOSFET Drivers

ISL6622A
UVCC
BOOT
UGATE
DU
DL
C_BOOT
G
PHASE
VIN
D
C_GD
C_DS
R_GI
C_GS
S
Q_UPPER
FIGURE 5. GATE-TO-SOURCE RESISTOR TO REDUCE
UPPER MOSFET MILLER COUPLING
Gate Drive Voltage Options
Intersil provides various gate drive voltage options in
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.
TABLE 1. ISL6622 FAMILY OPTIONS
LVCC
POWER RAILS
PSI = LOW
PSI = HIGH
UVCC
VCC
ISL6622
SOIC
5.75V
11.2V
VCC
Operating Voltage Ranges from 6.8V to 13.2V
DFN
Programmable
11.2V
Own Rail
ISL6622A SOIC
Own Rail
VCC
DFN
Own Rail
Own Rail
ISL6622B SOIC
5.75V
VCC
DFN
Programmable
Own Rail
9
FN6601.2
March 19, 2009