LM317LZ-AP View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

LM317LZ-AP

Low current 1.2 to 37 V adjustable voltage regulators

STMicroelectronics 

LM217L, LM317L

3

Maximum ratings

Maximum ratings

Table 2. Absolute maximum ratings

Symbol

Parameter

Value

Unit

VI-VO

PD

TOP

TSTG

Input-output differential voltage

Power dissipation

Operating junction temperature range

Storage temperature range

for LM217L

for LM317L

40

V

Internally limited

mW

-40 to 125

°C

0 to 125

-55 to 150

°C

Symbol

Table 3. Thermal data

Parameter

SO-8 TO-92 Unit

RthJC

RthJA

Thermal resistance junction-case (max)

Thermal resistance junction-ambient (max)

20

°C/W

55(1)(2)

200

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

2. 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.

Figure 3. Test circuit

,Q

2XW

$GM

*,3*59

DocID2168 Rev 7

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