ISL6326 Datasheet, PDF (8/30 Pages) Intersil Corporation – 4-Phase PWM Controller with 8-Bit DAC Code Capable of Precision rDS ON or DCR Differential Current Sensing

ISL6326
Electrical Specifications Operating Conditions: VCC = 5V, Unless Otherwise Specified. (Continued)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
VR_FAN Low Voltage
Leakage Current of VR_HOT
I_{VR_FAN} = 4mA
With externally pull-up resistor connected to VCC
-
-
0.4
V
-
-
30
µA
VR_HOT Low Voltage
I_{VR_HOT} = 4mA
VR READY AND PROTECTION MONITORS
-
-
0.4
V
Leakage Current of VR_RDY
With externally pull-up resistor connected to VCC
-
-
30
µA
VR_RDY Low Voltage
Undervoltage Threshold
I_{VR_RDY} = 4mA
VDIFF Falling
-
-
0.4
V
48 50 52 %VID
VR_RDY Reset Voltage
VDIFF Rising
58 60 62 %VID
Overvoltage Protection Threshold
Before valid VID
1.250 1.275 1.300 V
After valid VID, the voltage above VID
150 175 200 mV
Overvoltage Protection Reset Hysteresis
- 100 -
mV
NOTES:
3. These parts are designed and adjusted for accuracy with all errors in the voltage loop included.
4. Spec limits established by characterization and are not production tested.
5. During soft-start, VDAC rises from 0V to 1.1V first and then ramp to VID voltage after receiving valid VID.
6. Soft-start ramp rate is determined by the adjustable soft-start oscillator frequency at the speed of 6.25mV per cycle.
8
FN9262.1
May 5, 2008