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ISL6322_14 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 | |||
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ISL6322
Electrical Specifications Recommended Operating Conditions, Unless Otherwise Specified. (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNITS
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
ROFS = 10kΩ from OFS to GND
ROFS = 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
RL = 10k to ground, (Note 3)
CL = 100pF, RL = 10k to ground, (Note 3)
CL = 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, RS = 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, RISEN
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
Overvoltage Hysteresis
VSEN falling
100
mV
SWITCHING TIME (Note 3)
UGATE Rise Time
LGATE Rise Time
UGATE Fall Time
LGATE Fall Time
tRUGATE; VPVCC = 12V, 3nF load, 10% to 90%
tRLGATE; VPVCC = 12V, 3nF load, 10% to 90%
tFUGATE; VPVCC = 12V, 3nF load, 90% to 10%
tFLGATE; VPVCC = 12V, 3nF load, 90% to 10%
26
ns
18
ns
18
ns
12
ns
8
FN6328.2
August 2, 2007
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