ISL6327A Datasheet, PDF (7/29 Pages) Intersil Corporation – Enhanced 6-Phase PWM Controller with 8-Bit VID Code and Differential Inductor DCR or Resistor Current Sensing

ISL6327A
Electrical Specifications
Operating Conditions: VCC = 5V, 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 Sink Current
-
-
300 µA
REF Source Current
45 50 55
µA
REF Sink Current
45 50 55
µA
PIN-ADJUSTABLE OFFSET
Voltage at OFS Pin
Offset resistor connected to ground
380 400 420 mV
Voltage below VCC, offset resistor connected to VCC
1.55 1.60 1.65 V
OSCILLATORS
Accuracy of Switching Frequency Setting R_T = 100kΩ
Adjustment Range of Switching Frequency (Note 4)
225 250 275 kHz
0.08 -
1.0 MHz
Soft-Start Ramp Rate (Note 5)
R_SS = 100kΩ
Adjustment Range of Soft-Start Ramp Rate (Note 4)
- 1.563 - mV/µs
0.625 - 6.25 mV/µs
PWM GENERATOR
Sawtooth Amplitude
- 1.25 -
V
ERROR AMPLIFIER
Open-Loop Gain
Open-Loop Bandwidth
Slew Rate
Maximum Output Voltage
R_L = 10kΩ to ground (Note 4)
C_L = 100pF, R_L = 10kΩ to ground (Note 4)
C_L = 100pF (Note 4)
-
96
-
dB
-
80
-
MHz
-
25
-
V/µs
3.8 4.3 4.9
V
Output High Voltage @ 2mA
3.6
-
-
V
Output Low Voltage @ 2mA
-
-
1.8
V
REMOTE-SENSE AMPLIFIER
Bandwidth
(Note 4)
-
20
-
MHz
Output High Current
VSEN - RGND = 2.5V
-500 -
500 µA
Output High Current
VSEN - RGND = 0.6V
-500 -
500 µA
PWM OUTPUT
PWM Output Voltage LOW Threshold
I_LOAD = ±500µA
PWM Output Voltage HIGH Threshold
I_LOAD = ±500µA
CURRENT SENSE AND OVERCURRENT PROTECTION
-
-
0.5
V
4.3
-
-
V
Sensed Current Tolerance
ISEN1 = ISEN2 = ISEN3 = ISEN4 = ISEN5 = ISEN6 = 60µA
57 60 63
µA
Overcurrent Trip Level for Average Current
72 85 98
µA
Peak Current Limit for Individual Channel
100 120 140 µA
Maximum Voltage at IDROOP and IOUT
Pins
1.97 2.0 2.03 V
THERMAL MONITORING
TM Input Voltage for VR_FAN Trip
1.55 1.65 1.75 V
TM Input Voltage for VR_FAN Reset
1.85 1.95 2.05 V
TM Input Voltage for VR_HOT Trip
1.3 1.4 1.5
V
TM Input Voltage for VR_HOT Reset
1.55 1.65 1.75 V
Leakage Current of VR_HOT
With external pull-up resistor connected to VCC
-
-
30
µA
7
FN6833.0
February 17, 2009