MC35XS3400 FREESCALE [Freescale Semiconductor, Inc], MC35XS3400 Datasheet - Page 40

• Manufacturer Part Number: MC35XS3400
• Description: Quad High Side Switch (Quad 35m?)
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

ADDITIONAL DOCUMENTATION
THERMAL ADDENDUM (REV 1.0)
Introduction
technical data sheet. The addendum provides thermal performance
information that may be critical in the design and development of system
applications. All electrical, application and packaging information is
provided in the data sheet.
Package and Thermal Considerations
package independently heating with P
temperatures, T
reference temperature while only heat source 1 is heating with P
reference temperature while heat source 2 is heating with P
to R
one package to another in a standardized environment. This methodology is not meant to and will not predict the performance
of a package in an application-specific environment. Stated values were obtained by measurement and simulation according to
the standards listed below.
Standards
Table 24. Thermal Performance Comparison
40
35XS3400
ADDITIONAL DOCUMENTATION
THERMAL ADDENDUM (REV 1.0)
Notes:
This thermal addendum is provided as a supplement to the 35XS3400
This 35XS3400 is a dual die package. There are two heat sources in the
For m, n = 1, R
For m = 1, n = 2, R
The stated values are solely for a thermal performance comparison of
Resistance
1.
2.
3.
4.
5.
R
R
R
R
θJ21
Thermal
θ
θ
θ
θJCmn
JA mn
JB mn
JA mn
Per JEDEC JESD51-2 at natural convection, still air
condition.
2s2p thermal test board per JEDEC JESD51-7and
JESD51-5.
Per JEDEC JESD51-8, with the board temperature on the
center trace near the power outputs.
Single layer thermal test board per JEDEC JESD51-3 and
JESD51-5.
Thermal resistance between the die junction and the
exposed pad, “infinite” heat sink attached to exposed pad.
and R
(5)
(1)(2)
(2)(3)
(1)(4)
θJ22
T
T
J1
J1
J2
θJA11
and T
, respectively.
m = 1,
1 = Power Chip, 2 = Logic Chip
27.35
14.53
47.63
n = 1
1.48
=
θJA12
is the thermal resistance from Junction 1 to the
J2
R
R
, and a thermal resistance matrix with R
θJA11
θJA21
is the thermal resistance from Junction 1 to the
m = 1, n = 2
m = 2, n = 1
R
R
θJA12
θJA22
18.40
37.21
6.64
0.00
1
and P
.
2
P
P
. This results in two junction
1
2
[°C/W]
m = 2,
35.25
23.69
53.61
n = 2
0.95
2
. This applies
1
.
θJAmn
Figure 14. Detail of Copper Traces Under Device with
.
Note For package dimensions, refer to
the 35XS3400 data sheet.
35XS3400PNA
PNA SUFFIX (PB-FREE)
Analog Integrated Circuit Device Data
24-PIN PQFN (12 x 12)
Thermal Vias
98ARL10596D
24-PIN
PQFN
Freescale Semiconductor
0.2mm
0.5mm dia.
0.2mm