ISL6334AR5368 Datasheet, PDF (9/31 Pages) Intersil Corporation – VR11.1, 4-Phase PWM Controller with Light Load Efficiency Enhancement and Load Current Monitoring Features

ISL6334AR5368
Electrical Specifications Operating Conditions: VCC = 5V Unless Otherwise Specified. Boldface limits apply over the operating
temperature ranges, -40°C to +85°C or 0°C to +70°C. (Continued)
PARAMETER
TEST CONDITIONS
MIN
MAX
(Note 6) TYP (Note 6) UNITS
PIN-ADJUSTABLE OFFSET
Voltage at OFS Pin
Offset resistor connected to ground
390 400 415
mV
Voltage below VCC, offset resistor connected to
1.574 1.60 1.635
V
VCC
OSCILLATORS
Accuracy of Switching Frequency Setting
Adjustment Range of Switching Frequency
R_T = 100kΩ
(Note 8)
225 250 275
kHz
0.08
-
1.0
MHz
Soft-start Ramp Rate
Adjustment Range of Soft-Start Ramp Rate
R_SS = 100kΩ (Notes 8, 9, 10)
(Note 8)
- 1.563
0.625
-
-
6.25
mV/µs
mV/µs
PWM GENERATOR
Sawtooth Amplitude
(Note 8)
-
1.5
-
V
ERROR AMPLIFIER
Open-Loop Gain
Open-Loop Bandwidth
R_L = 10kΩ to ground (Note 8)
(Note 8)
-
96
-
dB
-
80
-
MHz
Slew Rate
(Note 8)
-
25
-
V/µs
Maximum Output Voltage
3.8
4.4
4.9
V
Output High Voltage @ 2mA
3.6
-
-
V
Output Low Voltage @ 2mA
-
-
1.6
V
REMOTE-SENSE AMPLIFIER (Note 4)
Bandwidth
(Note 8)
-
20
-
MHz
Output High Current
VSEN - RGND = 2.5V
-500
-
500
µA
Output High Current
VSEN - RGND = 0.6
-500
-
500
µA
PWM OUTPUT
Sink Impedance
PWM = Low with 1mA Load
100 220 300
Ω
Source Impedance
PWM = High, Forced to 3.7V
200 320 400
Ω
PSI# INPUT
High Signal Threshold
-
-
0.8
V
Low Signal Threshold
0.4
-
-
V
CURRENT SENSE AND OVERCURRENT PROTECTION
Sensed Current Tolerance
ISEN1 = ISEN2 = ISEN3 = ISEN4 = 40µA;
36.5
-
42
µA
CS Offset and Mirror Error Included, R_ISENx = 200Ω
ISEN1 = ISEN2 = ISEN3 = ISEN4 = 80µA;
74
-
83
µA
CS Offset and Mirror Error Included, R_ISENx = 200Ω
Overcurrent Trip Level for Average Current At Normal CS Offset and Mirror Error Included, R_ISENx = 200Ω 88
97
106
µA
CCM PWM Mode
Overcurrent Trip Level for Average Current at PSI#
Mode
N = 4, Drop to 1 Phase
-
96
-
µA
Peak Current Limit for Individual Channel
115 129 146
µA
IMON Clamped and OCP Trip Level
1.085 1.11 1.14
V
THERMAL MONITORING AND FAN CONTROL
TM Input Voltage for VR_FAN Trip
38.7 39.1 39.6 %VCC
9
FN6839.2
September 7, 2010