LP2967IBP-1833 National Semiconductor, LP2967IBP-1833 Datasheet - Page 15

• Manufacturer Part Number: LP2967IBP-1833
• Description: Dual Micropower 150 mA Low-Dropout Regulator in micro SMD Package
• Manufacturer: National Semiconductor

Application Hints
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 125˚C. 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
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15
ambient temperature coefficient (θ
age is 235˚C/W and the 8-bump micro SMD with minimum
copper area is 220˚C/W. The total power dissipation of the
device is given by:
The maximum power dissipation, PDmax, that the device
can tolerate can be calculated by using the formula:
where T
(125˚C), and T
PD = (V
JMAX
IN
is the maximum specified junction temperature
A
PDmax = (T
− V
is the maximum ambient temperature.
OUT
1) I
OUT
JMAX
1 + (V
− T
JA
) for an MSOP-8 pack-
IN
A
) / θ
− V
JA
OUT
2) I
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OUT
2