LP2967 datasheet(15/17 Pages) NSC

Part #	LP2967

Description	Dual Micropower 150 mA Low-Dropout Regulator in micro SMD Package

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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15 / 17 page

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 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

ambient temperature coefficient (

JA) for an MSOP-8 pack-

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:

PD=(V

IN −VOUT1) IOUT1+(VIN −VOUT2) IOUT2

The maximum power dissipation, PDmax, that the device

can tolerate can be calculated by using the formula:

PDmax = (T

JMAX −TA)/

where T

JMAX is the maximum specified junction temperature

(125˚C), and T

A is the maximum ambient temperature.

LP2967 Datasheet(PDF) 15 Page - National Semiconductor (TI)