CS8183YDWFR20

CS8183
http://onsemi.com
7
I
OUT1(max)
is the maximum output current, for the
application,
I
OUT2(max)
is the maximum output current, for the
application,
I
Q
is the quiescent current the regulator consumes at
I
OUT(max)
.
Once the value of PD(max) is known, the maximum
permissible value of R
q
JA
can be calculated:
R
qJA
+
150
C * T
A
P
D
(2)
The value of R
q
JA
can then be compared with those in the
package section of the data sheet. Those packages with
R
q
JA
s less than the calculated value in equation 2 will keep
the die temperature below 150°C.
In some cases, none of the packages will be sufficient to
dissipate the heat generated by the IC, and an external heat
sink will be required.
Figure 15. Dual Output Regulator with Key
Performance Parameters Labeled
I
IN
I
OUT
I
Q
SMART
V
OUT
V
IN
REGULATOR
Control
Features
Heatsinks
A heatsink effectively increases the surface area of the
package to improve the flow of heat away from the IC and
into the surrounding air.
Each material in the heat flow path between the IC and the
outside environment will have a thermal resistance. Like
series electrical resistances, these resistances are summed to
determine the value of R
q
JA:
R
qJA
+ R
qJC
) R
qCS
) R
qSA
(3)
where:
R
q
JC
= the junctiontocase thermal resistance,
R
q
CS
= the casetoheatsink thermal resistance, and
R
q
SA
= the heatsinktoambient thermal resistance.
R
q
JC
appears in the package section of the data sheet. Like
R
q
JA
, it is a function of package type. R
q
CS
and R
q
SA
are
functions of the package type, heatsink and the interface
between them. These values appear in heat sink data sheets
of heat sink manufacturers.
CS8183
http://onsemi.com
8
PACKAGE DIMENSIONS
20
1
11
10
B20X
H10X
C
L
18X
A1
A
SEATING
PLANE
q
h X 45
_
E
D
M
0.25
M
B
M
0.25
S
A
S
B
T
e
T
B
A
DIM MIN MAX
MILLIMETERS
A 2.35 2.65
A1 0.10 0.25
B 0.35 0.49
C 0.23 0.32
D 12.65 12.95
E 7.40 7.60
e 1.27 BSC
H 10.05 10.55
h 0.25 0.75
L 0.50 0.90
q 0 7
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE PROTRUSION
SHALL BE 0.13 TOTAL IN EXCESS OF B
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
__
SO20 WB
CASE 751D05
ISSUE G
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CS8183YDWFR20

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
LDO Voltage Regulators 2.8-45V ADJ 200mA
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