LM317

3-TERMINAL ADJUSTABLE REGULATOR

SLVS044H – SEPTEMBER 1997 – REVISED DECEMBER 2001

2

POST OFFICE BOX 655303

AVAILABLE OPTIONS

PACKAGED DEVICES

TJ

HEAT-SINK

(DCY)†

HEAT-SINK

MOUNTED, TO-220

(KC)

PLASTIC FLANGE

MOUNTED, POWER FLEX

(KTE)‡

0

°C to 125°C

LM317DCY

LM317KC

LM317KTER

† The DCY package also is available taped and reeled, e.g., LM317DCYR.

‡ The KTE package has the same footprint as TO-263 and can be mounted on a TO-263

land pattern. The KTE package is only available taped and reeled.

schematic diagram

ADJUST

OUTPUT

INPUT

40 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

49

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . .

(see Notes 1 and 3): KC package

25

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . .

(see Notes 1 and 2): KTE package

23

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds

260

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

§ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable

ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.

2. The package thermal impedance is calculated in accordance with JESD 51-5.

3. The package thermal impedance is calculated in accordance with JESD 51-7.

recommended operating conditions

MIN

MAX

UNIT

VI – VO

Input-to-output voltage differential

3

37

V

IO

Output current

1.5

A

TJ

Operating virtual junction temperature

0

125

°C