ISL6244CR Intersil, ISL6244CR Datasheet - Page 9
![IC CTRLR PWM 2-4-PHASE 32-QFN](/photos/6/88/68833/32-qfn_pkg_sml.jpg)
ISL6244CR
Manufacturer Part Number
ISL6244CR
Description
IC CTRLR PWM 2-4-PHASE 32-QFN
Manufacturer
Intersil
Datasheet
1.ISL6244CRZ.pdf
(25 pages)
Specifications of ISL6244CR
Pwm Type
Voltage/Current Mode
Number Of Outputs
4
Frequency - Max
4MHz
Duty Cycle
75%
Voltage - Supply
4.75 V ~ 5.25 V
Buck
Yes
Boost
No
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Operating Temperature
0°C ~ 70°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Frequency-max
4MHz
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ISL6244CRZ
Manufacturer:
HARRIS
Quantity:
24
Theory of Operation
Multi-Phase Power Conversion
Microprocessor load current profiles have changed to the
point where the multi-phase power conversion advantage is
pronounced. The technical challenges associated with
producing a single-phase converter which is both cost-
COMP
VDIFF
RGND
VSEN
IOUT
VID4
VID3
VID2
VID1
VID0
OFS
FB
AVERAGE
DYNAMIC
100µA
diff
9
DAC
VID
x 0.2
e/a
2.2V
PGOOD
UV
OV
+
-
85µA
FIGURE 12. BLOCK DIAGRAM
1/N
OC
SOFT START
ISL6244
+
+
POR
AND
VCC
GND
+
+
-
+
+
6V
+
+
effective and thermally viable have forced a change to the
cost-saving approach of multi-phase. The ISL6244 controller
helps reduce the complexity of implementation by integrating
vital functions and requiring minimal output components.
The block diagram in Figure 12 provides a top level view of
multi-phase power conversion using the ISL6244 controller.
-
+
EN
+
1.23V
-
+
+
OSCILLATOR
SAWTOOTH
-
AND
N PHASES
FS
I1
I2
I3
I4
CURRENT
DETECT
SENSE
PHASE
&
VFF
PWM1
ISEN1
ISEN2
ISEN3
ISEN4
PWM2
PWM3
PWM4
December 28, 2004
FN9106.3