ISL6364 Datasheet, PDF (9/44 Pages) Intersil Corporation – Dual 4-Phase + 1-Phase PWM Controller for VR12/IMVP7 Applications

ISL6364
Electrical Specifications Recommended Operating Conditions, V_CC = 5V, Unless Other wise specified. Boldface limits apply over the
operating temperature range. (Continued)
PARAMETER
TEST CONDITIONS
MIN
MAX
(Note 7) TYP (Note 7) UNITS
OSCILLATORS
Accuracy of VR0 Switching Frequency Setting
Accuracy of VR1 Switching Frequency Setting
Maximum Switching Frequency
R_FS = 125kΩ
R_FSS = 125kΩ
360 400 440 kHz
360 400 440 kHz
1.0
-
-
MHz
Minimum Switching Frequency
-
-
0.08 MHz
Soft-start Ramp Rate for VR0
FDVID = 10mV/µs
FDVID = 20mV/µs
2.5 2.8 3.2 mV/µs
5.0 5.55 6.2 mV/µs
Soft-start Ramp Rate for VR1
2.5 2.8 3.2 mV/µs
Maximum Duty Cycle Per PWM for VR0
Maximum Duty Cycle for VR1
400kHz, V_RAMP <1.8V
400kHz
95
97
99
%
69
83
96
%
PWM GENERATOR (Note 7)
Sawtooth Amplitude for VR0
Sawtooth Amplitude for VR0
Sawtooth Amplitude for VR0
Maximum Adjustable Ramp for VR0
R_{RAMP_ADJ} = Open, all Switching Frequency
R_{RAMP_ADJ} = 2.4 MΩ to 12V, 500kHz
R_{RAMP_ADJ} = 1.2 MΩ to 12V, 500kHz
Applicable to VR0 Only
-
1
-
V
-
0.5
-
V
-
1
-
V
-
3
-
V
Minimum Adjustable Ramp for VR0
Applicable to VR0 Only
-
0.3
-
V
Sawtooth Amplitude for VR1
Applicable to VR1 Only
2.0
V
ERROR AMPLIFIER
Open-Loop Gain
Open-Loop Bandwidth
R_L = 10kΩ to ground
-
96
-
dB
-
80
-
MHz
Slew Rate
-
25
-
V/µs
Maximum Output Voltage
No Load
4.1 4.4 4.6
V
Output High Voltage @ 2mA
2mA Load
3.8 4.1 4.6
V
Output Low Voltage @ 2mA
2mA Load
0.85 0.96 1.2
V
PWM OUTPUT (PWM[4:1] and PWMS)
Sink Impedance
PWM = Low with 1mA Load
-
170
-
Ω
Source Impedance
PWM = High, Forced to 3.7V
-
150
-
Ω
PWM PSI2/3/Decay Mid-Level
0.4mA Load
38
40
44 %VCC
CURRENT SENSE AND OVERCURRENT PROTECTION
Sensed Current Tolerance of VR0
ISEN1-4= 40µA;
36.5 40.7 44
µA
CS Offset and Mirror Error Included, R_SET = 12.8kΩ
ISEN1-4 = 80µA;
75.5 80.7 85.5 µA
CS Offset and Mirror Error Included, R_SET = 12.8kΩ
Sensed Current Tolerance of VR1
ISENS= 40µA; R_ISENS = 100Ω;
33
37
41
µA
ISENS = 80µA; R_ISENS= 100Ω
69.5 75
81
µA
VR0 Average Overcurrent Trip Level at Normal CCM PWM CS Offset and Mirror Error Included, R_SET = 12.8kΩ
-
100
-
µA
Mode
VR0 Average Overcurrent Trip Level at PSI1/2/3 Mode N = 4 Drop to 1-Phase
-
99
-
µA
VR0 Average Overcurrent Trip Level at PSI1 Mode
N = 4 Drop to 2-Phase
-
100
-
µA
9
FN6861.0
December 22, 2010