參數(shù)資料
型號(hào): LP2967IMMX-2626
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, PDSO8
封裝: MSOP-8
文件頁(yè)數(shù): 15/17頁(yè)
文件大小: 612K
代理商: LP2967IMMX-2626
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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