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參數(shù)資料
| 型號： | LP2967 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Dual Micropower 150 mA Low-Dropout Regulator in micro SMD Package |
| 中文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PBGA8 |
| 封裝： | MICRO, BUMP, SMD-8 |
| 文件頁數(shù)： | 15/17頁 |
| 文件大?。?/td> | 612K |
| 代理商： | LP2967 |
Application Hints
(Continued)
MAXIMUM POWER DISSAIPATION CAPABILITY
Each output pin the LP2967 can deliver a current of up to
150mA over the full operating junction temperature range.
However, the maximum output current must be derated at
higher ambient temperature to ensure the junction tempera-
ture does not exceed 125C. Under all possible conditions,
the junction temperatures must be within the range specified
under operating conditions. The LP2967 is available in
MSOP-8 package and 8-bump micro SMD. The junction to
ambient temperature coefficient (
θ
) for an MSOP-8 pack-
age is 235C/W and the 8-bump micro SMD with minimum
copper area is 220C/W. The total power dissipation of the
device is given by:
PD = (V
IN
V
OUT
1) I
OUT
1 + (V
IN
V
OUT
2) I
OUT
2
The maximum power dissipation, PDmax, that the device
can tolerate can be calculated by using the formula:
PDmax = (T
JMAX
T
A
) /
θ
JA
where T
JMAX
is the maximum specified junction temperature
(125C), and T
A
is the maximum ambient temperature.
L
www.national.com
15
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