ISL6313B Datasheet, PDF (7/33 Pages) Intersil Corporation – Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for Intel VR11 and AMD Applications

ISL6313B
Electrical Specifications
Recommended Operating Conditions, Unless Otherwise Specified. Parameters with MIN and/or MAX limits are
100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are
not production tested. (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
DAC Input High Voltage (INTEL)
0.8
-
-
V
DAC Input Low Voltage (AMD)
-
-
0.8
V
DAC Input High Voltage (AMD)
1.4
-
-
V
PIN-ADJUSTABLE OFFSET
OFS Sink Current Accuracy (Negative R_OFS = 32.4kΩ from OFS to VCC
Offset)
47.0
50.0
53.0
µA
OFS Source Current Accuracy
(Positive Offset)
R_OFS = 6.04kΩ from OFS to GND
47.0
50.0
53.0
µA
ERROR AMPLIFIER
DC Gain
Gain-Bandwidth Product
R_L = 10k to ground, (Note 3)
C_L = 100pF, R_L = 10k to ground,
(Note 3)
-
96
-
dB
-
40
-
MHz
Slew Rate
Maximum Output Voltage
C_L = 100pF, Load = ±400µA, (Note 3)
-
20
Load = 1mA
3.90
4.20
-
V/µs
-
V
Minimum Output Voltage
Load = -1mA
-
1.30
1.52
V
SOFT-START RAMP
Soft-Start Ramp Rate
R_S = 100kΩ
Adjustment Range of Soft-Start Ramp
Rate (Note 3)
-
1.26
0.156
-
-
mV/µs
6.25
mV/µs
CURRENT SENSING
IOUT Current Sense Offset
R_SET = 40.2kΩ, V_ISEN1+ = V_ISEN2+ = 0V
-2.5
0
2.5
µA
IOUT Current Sense Gain
R_SET = 40.2kΩ, V_ISEN1 = V_ISEN2 = 24mV
76
80
84
µA
(ISL6313BCRZ)
IOUT Current Sense Gain
R_SET = 40.2kΩ, V_ISEN1 = V_ISEN2 = 24mV
73
80
84
µA
(ISL6313BIRZ)
OVERCURRENT PROTECTION
Overcurrent Trip Level - Average
Channel
Normal operation (ISL6313BCRZ)
Normal operation (ISL6313BIRZ)
88
100
112
µA
82
100
118
µA
Dynamic VID change
114
140
166
µA
Overcurrent Trip Level - Individual
Channel
Normal operation
Dynamic VID change
114
140
166
µA
166
196
226
µA
IOUT Pin Overcurrent Trip Level
1.97
2.02
2.07
V
PROTECTION
Undervoltage Threshold
VSEN falling
VDAC - 325mV VDAC - 350mV VDAC - 375mV V
Undervoltage Hysteresis
VSEN rising
85
100
125
mV
Overvoltage Threshold During Soft-
Start
VR11 and AMD
1.220
1.260
1.300
V
Overvoltage Threshold
VR11, VSEN rising
VDAC + 150mV VDAC + 175mV VDAC + 200mV V
AMD, VSEN rising
VDAC + 200mV VDAC + 225mV VDAC + 250mV V
Overvoltage Hysteresis
VSEN falling
-
100
-
mV
7
FN6809.0
November 6, 2008