ISL6312 Datasheet, PDF (7/35 Pages) Intersil Corporation – Four-Phase Buck PWM Controller with Integrated MOSFET Drivers for Intel VR10,VR11, and AMD Applications

ISL6312
Electrical Specifications Recommended Operating Conditions, Unless Otherwise Specified. (Continued)
PARAMETER
TEST CONDITIONS
MIN
MAX
(Note 6) TYP (Note 6) 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
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
R_L = 10k to ground, (Note 5)
C_L = 100pF, R_L = 10k to ground, (Note 5)
CL = 100pF, Load = ±400mA, (Note 5)
-
96
-
dB
-
20
-
MHz
-
8
-
V/μs
Maximum Output Voltage
Load = 1mA
3.90
4.20
-
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
- mV/µs
2.063
mV/µs
Adjustment Range of Soft-Start Ramp Rate (Note 5)
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 NOTES:)
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)
VR10/VR11, OVPSEL tied to ground, VSEN rising VDAC + VDAC + VDAC + V
150mV 175mV 200mV
AMD, OVPSEL tied to ground, VSEN rising
VDAC + VDAC + VDAC + V
225mV 250mV 275mV
Overvoltage Threshold (Alternate)
OVPSEL tied to +5V, VSEN rising
VDAC + VDAC + VDAC + V
325mV 350mV 375mV
Overvoltage Hysteresis
VSEN falling
-
100
-
mV
SWITCHING TIME (Note 5)
UGATE Rise Time
t_RUGATE; V_PVCC = 12V, 3nF load, 10% to 90%
-
26
-
ns
7
FN9289.5
February 25, 2010