ISL6322_07 Datasheet, PDF (8/41 Pages) Intersil Corporation – Four-Phase Buck PWM Controller with Integrated MOSFET Drivers and I2C Interface for Intel VR10, VR11, and AMD Applications

ISL6322
Electrical Specifications Recommended Operating Conditions, Unless Otherwise Specified. (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNITS
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 - 0.600V)
-2.0
2.0
%
DAC Input Low Voltage (VR10, VR11)
0.4
V
DAC Input High Voltage (VR10, VR11)
0.8
V
DAC Input Low Voltage (AMD)
0.6
V
DAC Input High Voltage (AMD)
1.0
V
PIN-ADJUSTABLE OFFSET
OFS Sink Current Accuracy (Negative Offset)
OFS Source Current Accuracy (Positive Offset)
ERROR AMPLIFIER
R_OFS = 10kΩ from OFS to GND
R_OFS = 30kΩ from OFS to VCC
37.0
40.0
43.0 μA
50.5
53.5
56.5 μA
DC Gain
Gain-Bandwidth Product
Slew Rate
Maximum Output Voltage
R_L = 10k to ground, (Note 3)
C_L = 100pF, R_L = 10k to ground, (Note 3)
C_L = 100pF, Load = ±400μA, (Note 3)
Load = 1mA
96
20
8
3.90
4.20
dB
MHz
V/μs
V
Minimum Output Voltage
Load = -1mA
1.30
1.5
V
SOFT-START RAMP
Soft-Start Ramp Rate
VR10/VR11, R_S = 100kΩ
AMD
1.563
2.063
mV/µs
mV/µs
Adjustment Range of Soft-Start Ramp Rate (Note 3)
0.625
6.25 mV/µs
PWM OUTPUT
PWM Output Voltage LOW Threshold
Iload = ±500μA
0.5
V
PWM Output Voltage HIGH Threshold
Iload = ±500μA
4.5
V
CURRENT SENSING
Current Sense Resistance, R_ISEN
Sensed Current Tolerance
T = +25°C
ISEN1+ = ISEN2+ = ISEN3+ = ISEN4+ = 80μA
297
300
303
Ω
76
80
84
μA
OVERCURRENT PROTECTION
Overcurrent Trip Level - Average Channel
Normal operation
110
125
140
μA
Dynamic VID change
143
163
183
μA
Overcurrent Trip Level - Individual Channel
Normal operation
150
177
204
μA
Dynamic VID change (Note 3)
209.4
238
266.6 μA
PROTECTION
Undervoltage Threshold
VSEN falling
55
60
65 %VID
Undervoltage Hysteresis
VSEN rising
10
%VID
Overvoltage Threshold During Soft-Start
VR10/VR11
1.24
1.28
1.32
V
AMD
2.13
2.20
2.27
V
Overvoltage Threshold (Default)
VSEN rising
VDAC + VDAC + VDAC + V
225mV 250mV 275mV
Overvoltage Threshold (Alternate)
VSEN rising
VDAC + VDAC + VDAC + V
150mV 175mV 200mV
8
FN6328.1
February 15, 2007