ISL6315 Datasheet, PDF (5/20 Pages) Intersil Corporation – Two-Phase Multiphase Buck PWM Controller with Integrated MOSFET Drivers

ISL6315
Electrical Specifications Test Conditions: V_CC = 5V, T_J = 0°C to 85°C, Unless Otherwise Specified (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
PROTECTION
Overvoltage Threshold while IC Disabled
VRM9.0 configuration
1.90
1.95
Hammer and VRM10.0 configurations
1.60
1.65
Overvoltage Threshold
FB Rising
-
VID
+200mV
Overvoltage Hysteresis
-
100
SWITCHING TIME
UGATE Rise Time (Note 3)
LGATE Rise Time (Note 3)
UGATE Fall Time (Note 3)
LGATE Fall Time (Note 3)
UGATE Turn-On Non-overlap (Note 3)
LGATE Turn-On Non-overlap (Note 3)
OUTPUT
t_RUGATE; V_VCC = 5V, 3nF Load
t_RLGATE; V_VCC = 5V, 3nF Load
t_FUGATE; V_VCC = 5V, 3nF Load
t_FLGATE; V_VCC = 5V, 3nF Load
t_PDHUGATE; V_VCC = 5V, 3nF Load
t_PDHLGATE; V_VCC = 5V, 3nF Load
-
8
-
8
-
8
-
4
-
8
-
8
Upper Drive Source Resistance
100mA Source Current
-
1.0
Upper Drive Sink Resistance
100mA Sink Current
-
1.0
Lower Drive Source Resistance
100mA Source Current
-
1.0
Lower Drive Sink Resistance
100mA Sink Current
-
0.4
NOTES:
3. Parameter magnitude guaranteed by design.
MAX UNITS
2.00
V
1.70
V
-
V
-
mV
-
ns
-
ns
-
ns
-
ns
-
ns
-
ns
2.5
Ω
2.5
Ω
2.5
Ω
1.0
Ω
Timing Diagram
t_PDHUGATE
t_RUGATE
t_FUGATE
UGATE
LGATE
t_FLGATE
t_PDHLGATE
t_RLGATE
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 0.1µF
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 1µF
ceramic capacitor.
5
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 40µA (typically) internal current
FN9222.0
February 10, 2006