ISL6326B Datasheet, PDF (7/30 Pages) Intersil Corporation – 4-Phase PWM Controller with 8-Bit DAC Code Capable of Precision DCR Differential Current Sensing

ISL6326B
Electrical Specifications Operating Conditions: VCC = 5V, Unless Otherwise Specified (Continued)
PARAMETER
TEST CONDITIONS
DAC Sink Current
REF Source Current
REF Sink Current
PIN-ADJUSTABLE OFFSET
Voltage at OFS Pin
Offset resistor connected to ground
Voltage below VCC, offset resistor connected to VCC
OSCILLATORS
Accuracy of Switching Frequency Setting R_T = 100kΩ
Adjustment Range of Switching Frequency (Note 4)
Soft-start Ramp Rate
R_S = 100kΩ (Notes 5, 6)
Adjustment Range of Soft-Start Ramp Rate (Note 4)
PWM GENERATOR
Sawtooth Amplitude
ERROR AMPLIFIER
Open-Loop Gain
Open-Loop Bandwidth
R_L = 10kΩ to ground (Note 4)
(Note 4)
Slew Rate
(Note 4)
Maximum Output Voltage
Output High Voltage @ 2mA
Output Low Voltage @ 2mA
REMOTE-SENSE AMPLIFIER
Bandwidth
(Note 4)
Output High Current
VSEN - RGND = 2.5V
Output High Current
VSEN - RGND = 0.6
PWM OUTPUT
PWM Output Voltage LOW Threshold
Iload = ±500μA
PWM Output Voltage HIGH Threshold
Iload = ±500μA
CURRENT SENSE AND OVERCURRENT PROTECTION
Sensed Current Tolerance (IOUT)
ISEN1 = ISEN2 = ISEN3 = ISEN4 = 60μA
Overcurrent Trip Level for Average Current
Peak Current Limit for Individual Channel
IOUT Trip Level for Overcurrent protection
THERMAL MONITORING AND FAN CONTROL
TM Input Voltage for VR_FAN Trip
TM Input Voltage for VR_FAN Reset
TM Input Voltage for VR_HOT Trip
TM Input Voltage for VR_HOT Reset
Leakage Current of VR_FAN
With externally pull-up resistor connected to VCC
VR_FAN Low Voltage
With 1.25k resistor pull-up to VCC, I_{VR_FAN} = 4mA
MIN TYP MAX UNITS
-
-
300 µA
45 50 55
µA
45 50 55
µA
380 400 420 mV
1.55 1.60 1.65 V
225 250
0.08 -
- 1.563
0.625 -
275
1.0
-
6.25
kHz
MHz
mV/µs
mV/µs
- 1.25 -
V
-
96
-
dB
-
80
-
MHz
-
25
-
V/µs
3.8 4.3 4.9
V
3.6
-
-
V
-
-
1.8
V
-
20
-500 -
-500 -
-
MHz
500 µA
500 µA
-
-
0.5
V
4.3
-
-
V
57 60 63
µA
72 85 98
µA
100 120 140 µA
1.85 2.0 2.15 V
1.55 1.65 1.75 V
1.85 1.95 2.05 V
1.30 1.40 1.50 V
1.55 1.65 1.75 V
-
-
30
µA
-
-
0.4
V
7
FN9286.0
April 21, 2006