ISL6323B Datasheet, PDF (7/35 Pages) Intersil Corporation – Monolithic Dual PWM Hybrid Controller Powering AMD SVI Split-Plane and PVI Uniplane Processors

ISL6323B
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
VDDPWRGD Sink Current
Open drain, V_VDDPWRGD = 400mV
4
mA
PWM Channel Disable Threshold
V_ISEN3-, V_ISEN4-, V_ISEN2-
4.4
V
PIN_ADJUSTABLE OFFSET
OFS Source Current Accuracy (Positive Offset)
OFS Sink Current Accuracy (Negative Offset)
REFERENCE AND DAC
R_OFS = 10kΩ (±0.1%) from OFS to GND
R_OFS = 30kΩ (±0.1%) from OFS to VCC
27.5
31
34.5
µA
50.5
53.5
56.5
µA
System Accuracy (VDAC > 1.000V)
-0.6
0.6
%
System Accuracy (0.600V < VDAC < 1.000V)
-1.0
1.0
%
System Accuracy (VDAC < 0.600V)
-2.0
2.0
%
DVC Voltage Gain
VDAC = 1V
2.0
V
APA Current Tolerance
ERROR AMPLIFIER
V_APA = 1V
90
100
108
µA
DC Gain
Gain-Bandwidth Product (Note 3)
Slew Rate (Note 3)
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
3.80
4.20
dB
MHz
V/µs
V
Minimum Output Voltage
Load = -1mA
1.3
1.6
V
SOFT-START RAMP
Soft-Start Ramp Rate
2.2
3.0
4.0
mV/µs
PWM OUTPUTS
PWM Output Voltage LOW Threshold
PWM Output Voltage HIGH Threshold
CURRENT SENSING - CORE CONTROLLER
I_LOAD = ±500µA
I_LOAD = ±500µA
0.5
V
4.5
V
Sensed Current Tolerance
CURRENT SENSING - NB CONTROLLER
V_ISENn--V_ISENn+ = 23.2mV, R_SET = 37.6kΩ,
68
4 Phases, T_A = +25°C
88
µA
Sensed Current Tolerance
DROOP CURRENT
V_{ISEN_NB-} - V_{ISEN_NB+} = 23.2mV,
68
R_SET = 37.6kΩ, 4 Phases, T_A = +25°C
89
µA
Tolerance
OVERCURRENT PROTECTION
V_ISENn- - V_ISENn+ = 23.2mV, R_SET = 37.6kΩ,
68
4 Phases, T_A = +25°C
88
µA
Overcurrent Trip Level - Average Channel
Normal Operation, R_SET = 28.2kΩ
Dynamic VID Change (Note 3)
87
100
120
µA
130
µA
Overcurrent Limiting - Individual Channel
Normal Operation, R_SET = 28.2kΩ
Dynamic VID Change (Note 3)
142
µA
190
µA
POWER GOOD
Core Overvoltage Threshold
VSEN Rising
VDAC VDAC + VDAC
+225mV 250mV +275mV
7
FN6879.0
March 23, 2009