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ISL6315 Datasheet(PDF) 5 Page - Intersil Corporation

Part No. ISL6315
Description  Two-Phase Multiphase Buck PWM Controller with Integrated MOSFET Drivers
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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 5 page
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5
FN9222.0
February 10, 2006
Timing Diagram
Functional Pin Description
VCC (Pin 8)
Bias supply for the IC’s small-signal circuitry. Connect this
pin to a 5V supply and locally decouple using a quality 0.1
µF
ceramic capacitor.
PVCC (Pin 16)
Power supply pin for the MOSFET drives. Connect this pin to
a 5V supply and locally decouple using a quality 1
µF
ceramic capacitor.
GND and PGND (Pins 25 and 14)
Connect these pins to the circuit ground using the shortest
possible paths. All internal small-signal circuitry is
referenced to the GND pin. LGATE drive is referenced to the
PGND pin.
VID0-4 (Pins 2, 1, 24-22)
Voltage identification inputs from microprocessor. These pins
respond to TTL logic thresholds. The ISL6315 decodes the
VID inputs to establish the output voltage; see VID Tables for
correspondence between DAC codes and output voltage
settings. These pins are internally pulled high, to
approximately 1.2V, by 40
µA (typically) internal current
PROTECTION
Overvoltage Threshold while IC Disabled
VRM9.0 configuration
1.90
1.95
2.00
V
Hammer and VRM10.0 configurations
1.60
1.65
1.70
V
Overvoltage Threshold
FB Rising
-
VID
+200mV
-V
Overvoltage Hysteresis
-
100
-
mV
SWITCHING TIME
UGATE Rise Time (Note 3)
tRUGATE; VVCC = 5V, 3nF Load
-
8
-
ns
LGATE Rise Time (Note 3)
tRLGATE; VVCC = 5V, 3nF Load
-
8
-
ns
UGATE Fall Time (Note 3)
tFUGATE; VVCC = 5V, 3nF Load
-
8
-
ns
LGATE Fall Time (Note 3)
tFLGATE; VVCC = 5V, 3nF Load
-
4
-
ns
UGATE Turn-On Non-overlap (Note 3)
tPDHUGATE; VVCC = 5V, 3nF Load
-
8
-
ns
LGATE Turn-On Non-overlap (Note 3)
tPDHLGATE; VVCC = 5V, 3nF Load
-
8
-
ns
OUTPUT
Upper Drive Source Resistance
100mA Source Current
-
1.0
2.5
Upper Drive Sink Resistance
100mA Sink Current
-
1.0
2.5
Lower Drive Source Resistance
100mA Source Current
-
1.0
2.5
Lower Drive Sink Resistance
100mA Sink Current
-
0.4
1.0
NOTES:
3. Parameter magnitude guaranteed by design.
Electrical Specifications
Test Conditions: VCC = 5V, TJ = 0°C to 85°C, Unless Otherwise Specified (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
UGATE
LGATE
tFLGATE
tPDHUGATE
tRUGATE
tFUGATE
tPDHLGATE
tRLGATE
ISL6315
ISL6315




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