ISL6556A Intersil Corporation, ISL6556A Datasheet - Page 7

• Manufacturer Part Number: ISL6556A
• Description: Optimized Multi-Phase PWM Controller with 6-Bit DAC for VR10.X Application
• Manufacturer: Intersil Corporation

Electrical Specifications
NOTES:
Functional Pin Description
VCC
Supplies all the power necessary to operate the chip. The
controller starts to operate when the voltage on this pin
exceeds the rising POR threshold and shuts down when the
voltage on this pin drops below the falling POR threshold.
Connect this pin directly to a +5V supply or through a series
300
GND
Bias and reference ground for the IC.
OSCILLATOR
Accuracy
Adjustment Range
Sawtooth Amplitude
Max Duty Cycle
ERROR AMPLIFIER
Open-Loop Gain
Open-Loop Bandwidth
Slew Rate
Maximum Output Voltage
Output High Voltage @ 2mA
Output Low Voltage @ 2mA
REMOTE-SENSE AMPLIFIER
Bandwidth
Output High Current
Output High Current
PWM OUTPUT
PWM Output Voltage LOW Threshold
PWM Output Voltage HIGH Threshold
SENSE CURRENT
Sensed Current Tolerance
Over-Current Trip Level
POWER GOOD AND PROTECTION MONITORS
PGOOD Low Voltage
Under-Voltage Offset From VID
Over-Voltage Threshold
Over-Voltage Reset Voltage
OVP Drive Voltage
Minimum VCC for OVP
4. When using the internal shunt regulator, VCC is clamped to 6.02V (max). Current must be limited to 25mA or less.
5. These parts are designed and adjusted for accuracy with all errors in the voltage loop included.
6. During soft start, VDAC rises from 0 to VID. The over-voltage trip level is the higher of 1.7V and VDAC + 0.2V.
resistor to a +12V supply.
PARAMETER
7
Operating Conditions: VCC = 5V or ICC < 25mA (Note 3), T
R
R
C
C
VSEN - RGND = 2.5V
VSEN - RGND = 0.6
Iload = +/-500 A
Iload = +/-500 A
ISEN1=ISEN2=ISEN3=ISEN4=80 A, 0°C to 105°C
I
VSEN Falling
Voltage above VID, After Soft Start (Note 5)
Before Enable
VCC < POR Threshold
VCC
VCC < POR Threshold
I
PGOOD
OVP
T
L
L
L
= 10k
= 100pF, R
= 100pF
= 100 k
= -100mA, VCC = 5V
POR Threshold, VSEN Falling
= 4mA
to ground
L
= 10k to ground
ISL6556A
TEST CONDITIONS
EN
This pin is a threshold-sensitive enable input for the
controller. Connecting the 12V supply to EN through an
appropriate resistor divider provides a means to synchronize
power-up of the controller and the MOSFET driver ICs.
When EN is driven above 1.24V, the ISL6556A is active
depending on status of ENLL, the internal POR, and pending
fault states. Driving EN below 1.14V will clear all fault states
and prime the ISL6556 to soft start when re-enabled.
J
= 0
o
C to 105
o
C. Unless Otherwise Specified . (Continued)
-500
-500
MIN
0.08
180
-10
4.5
4.0
3.7
4.3
1.7
1.4
74
95
72
-
-
-
-
-
-
-
-
-
-
-
-
TYP
66.7
1.63
110
200
1.5
6.0
4.3
1.8
0.6
1.5
1.9
80
18
20
81
74
-
-
-
-
-
-
-
-
-
-
MAX
1.35
1.87
500
500
130
220
1.5
7.5
0.3
0.4
10
91
76
-
-
-
-
-
-
-
-
-
-
-
-
-
UNITS
%VID
MHz
MHz
MHz
A
V/ s
mV
dB
%
%
V
V
V
V
V
V
V
V
V
V
V
V
V
A
A
A