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參數(shù)資料
| 型號： | TPS51206DSQT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO10 |
| 封裝： | 2 X 2 MM, GREEN, PLASTIC, SON-10 |
| 文件頁數(shù)： | 5/23頁 |
| 文件大?。?/td> | 603K |
| 代理商： | TPS51206DSQT |
(
)
=
-
DISS(src)
VLDOIN
VTT
VTT(src)
P
V
I
=
DISS(snk)
VTT
VTT(snk)
P
V
I
-
=
q
J(max)
A(max)
PKG
JA
T
P
SLUSAH1
– MAY 2011
THERMAL DESIGN
Because the TPS51206 is a linear regulator, the VTT current flows in both source and sink directions, thereby
dissipating power from the device. When the device is sourcing current, the voltage difference between VLDOIN
(1)
In this case, if the VLDOIN pin is connected to an alternative power supply lower than the VDDQ voltage, overall
power loss can be reduced. For the sink phase, VTT voltage is applied across the internal LDO regulator, and
the power dissipation can be calculated by Equation 2.
(2)
Maximum power dissipation allowed by the package is calculated by Equation 3.
where
TJ(max) is +125°C
TA(max) is the maximum ambient temperature in the system
θJA is the thermal resistance from junction to ambient
(3)
Copyright
2011, Texas Instruments Incorporated
13
Product Folder Link(s): TPS51206
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