ISL6237IRZ Intersil, ISL6237IRZ Datasheet - Page 20
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ISL6237IRZ
Manufacturer Part Number
ISL6237IRZ
Description
IC MAIN PWR CTRLR QUAD 32-QFN
Manufacturer
Intersil
Datasheet
1.ISL6237IRZ.pdf
(35 pages)
Specifications of ISL6237IRZ
Applications
Controller, Notebook Computers
Voltage - Input
5.5 ~ 25 V
Number Of Outputs
4
Operating Temperature
-40°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ISL6237IRZ
Manufacturer:
INTERSIL
Quantity:
14
Part Number:
ISL6237IRZ
Manufacturer:
INTERSIL
Quantity:
20 000
Part Number:
ISL6237IRZ-T
Manufacturer:
INTERSIL
Quantity:
20 000
.
(t
or OPEN), VOUT1
(t
VOUT2
(t
VOUT1
(t
or OPEN), VOUT2
ON
ON
ON
ON
= GND, REF,
= GND),
= VCC),
= VCC, REF,
SMPS
TABLE 2. APPROXIMATE K-FACTOR ERRORS
FREQUENCY
SWITCHING
(kHz)
400
500
200
300
20
K-FACTOR
(µs)
2.5
2.0
5.0
3.3
APPROXIMATE
ERROR (%)
K-FACTOR
±10
±10
±10
±10
ISL6237
For loads above the critical conduction point, the actual
switching frequency is:
where:
• V
• V
• t
f
=
inductor discharge path, including synchronous rectifier,
inductor, and PC board resistances
charging path, including high-side switch, inductor, and PC
board resistances
ON
DROP1
DROP2
------------------------------------------------------ -
t
ON
V
is the on-time calculated by the ISL6237
OUT
(
V
IN
is the sum of the parasitic voltage drops in the
+
is the sum of the parasitic voltage drops in the
+
V
V
DROP1
DROP2
)
March 18, 2008
FN6418.4
(EQ. 2)