參數(shù)資料
型號(hào)： TPS9125PW
廠商： Texas Instruments, Inc.
英文描述： 5 V/3 V SIM SUPPLY AND LEVEL SHIFTERS
中文描述： 5伏/ 3伏SIM卡供應(yīng)及電平轉(zhuǎn)換器
文件頁(yè)數(shù)： 12/24頁(yè)
文件大小： 338K
代理商： TPS9125PW
TPS9125
5 V/3 V SIMSUPPLY AND LEVEL SHIFTERS
SLVS244A – SEPTEMBER 1999 – REVISED NOVEMBER 1999
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
THERMAL INFORMATION
Implementation of integrated circuits in low profile and fine-pitch surface-mount packages requires special
attention to power dissipation. Many system-dependent issues such as thermal coupling, airflow, added heat
sinks and convection surfaces, as well as the presence of other heat-generating components, affect the
power-dissipation limits of a given component.
Three basic approaches for enhancing thermal performance are listed below.
Improving the power dissipation capability of the PWB design
Improving the thermal coupling of the component to the PWB
Introducing airflow in the system
Using the given R
θ
JA
for this IC, the maximum power dissipation can be calculated with the equation:
TJ(MAX)
R
JA
PD(MAX)
TA
5.030
5.025
5.050
–10
0
10
TA – Free-Air Temperature –
°
C
20
30
40
50
5
5.035
5 V MODE SIMVCC OUTPUT
vs
FREE-AIR TEMPERATURE
5.040
60
70
80
90
Figure 10
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