ISL6266AIRZ Intersil, ISL6266AIRZ Datasheet - Page 29

• Manufacturer Part Number: ISL6266AIRZ
• Description: IC CORE CTRLR 2PHASE 48-QFN
• Manufacturer: Intersil

Specifications of ISL6266AIRZ

• Applications: Converter, Intel IMVP-6
• Voltage - Input: 5 ~ 25 V
• Number Of Outputs: 1
• Voltage - Output: 0.3 ~ 1.5 V
• Operating Temperature: -40°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 48-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

V
drives will turn off and PGOOD will go low.
The selection of R
overcurrent trip level, I
specification of the load line slope, R
R
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
R
OC
OC
OC
. Once the droop voltage is greater than V
is calculated by Equation 37.
=
OC
I
---------------------------------- -
OC
VDIFF
INTERNAL TO
ISL6266A
10μA
•
R
FIGURE 42. EQUIVALENT MODEL FOR DROOP AND DIE SENSING USING DISCRETE RESISTOR SENSING
droop
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-
+
OC
+
+
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
=
10µA
is given in Equation 37. Assuming an
OC
55 0.0021
------------------------------
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10 10
1
1
, of 55A, and knowing from the Intel
•
•
+
-
+
-
29
RTN
–
6
VSEN
=
DROOP
11.5kΩ
droop
+
-
DROOP
= 0.0021 (V/A),
OCSET
VSUM
DFB
OC
VO'
, the PWM
ISL6266, ISL6266A
(EQ. 37)
+Voc -Roc
VSUM
Cn
VO'
+
-
Note, if the droop load line slope is not -0.0021 (V/A) in the
application, the overcurrent setpoint will differ from
predicted. In addition, due to the saturation limitations of the
DROOP amplifier, there is a maximum way-overcurrent
(WOC) set point for each VID code. The maximum OC set
point that will ensure WOC can be reached is expressed in
Equation 38:
The WOC limitation is only problematic at very high VID
settings (~1.350V and above).
I
VN
OC
=
------------------------------------- -
2.5 R
1.75 VID
⋅
DROOP
–
Vrsense EQV
RS
EQV
RO
=
EQV
RS
--------
=
2
I OUT
=
RO
-------- -
2
×
Rsense
---------------------- -
2
June 14, 2010
(EQ. 38)
+
-
FN6398.3