L78L datasheet(4/40 Pages) STMICROELECTRONICS

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Maximum ratings

Table 1. Absolute maximum ratings

Symbol

Parameter

Value

Unit

DC Input voltage

VO = 3.3 to 9 V

VO = 12 to 15 V

VO = 18 to 24 V

Output current

100

Power dissipation

Internally limited (1)

TSTG

Storage temperature range

-65 to 150

°C

TOP

Operating junction temperature range

for L78LxxAC / L78LxxC

0 to 125

°C

for L78LxxAB

-40 to 125

1. Our SO-8 package used for voltage regulators is modified internally to have pins 2, 3, 6 and 7 electrically

communed to the die attach flag. This particular frame decreases the total thermal resistance of the

package and increases its ability to dissipate power when an appropriate area of copper on the printed

circuit board is available for heat-sinking. The external dimensions are the same as for the standard SO-8.

Table 2. Thermal data

Symbol

Parameter

SO-8

TO-92

SOT-89

Unit

RthJC

Thermal resistance junction-case (max)

°C/W

RthJA

Thermal resistance junction-ambient (max)

55 (1)

200

55 (1)

°C/W

1. Considering 6 cm² of copper Board heat-sink.

L78L

Maximum ratings

DS0424 - Rev 28

page 4/40

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