LM317

3-TERMINAL ADJUSTABLE REGULATOR

SLVS044H – SEPTEMBER 1997 – REVISED DECEMBER 2001

3

POST OFFICE BOX 655303

electrical characteristics over recommended ranges of operating virtual junction temperature

(unless otherwise noted)

PARAMETER

TEST CONDITIONS†

MIN

TYP

MAX

UNIT

Input voltage (line) regulation‡

VI VO =3Vto40V

TJ = 25°C

0.01

0.04

%/V

Input voltage (line) regulation‡

VI – VO = 3 V to 40 V

TJ = 0°C to 125°C

0.02

0.07

%/V

CADJ = 10 µF§,

VO ≤ 5 V

25

mV

Output voltage

IO = 10 mA to 1500 mA

ADJ

µ ,

TJ = 25°C

VO ≥ 5 V

0.1

0.5

%VO

g

(load) regulation

IO = 10 mA to 1500 mA

TJ =0°Cto125°C

VO ≤ 5 V

20

70

mV

TJ = 0°C to 125°C

VO ≥ 5 V

0.3

1.5

%VO

Thermal regulation

20-ms pulse,

TJ = 25°C

0.03

0.07

%VO/W

ADJUST terminal current

50

100

µA

Change in

ADJUST terminal current

VI – VO = 2.5 V to 40 V, PD ≤ 20 W, IO = 10 mA to 1500 mA

0.2

5

µA

Reference voltage (Vref)

(OUTPUT to ADJUST)

VI – VO = 3 V to 40 V, PD ≤ 20 W, IO = 10 mA to 1500 mA

1.2

1.25

1.3

V

Output-voltage

temperature stability

TJ = 0°C to 125°C

0.7

%VO

Minimum load current

to maintain regulation

VI – VO = 40 V

3.5

10

mA

Peak output current

VI – VO ≤ 15 V,

PD < PMAX (see Note 1)

1.5

2.2

A

Peak output current

VI – VO ≤ 40 V, PD < PMAX (see Note 1), TJ = 25°C

0.15

0.4

A

Output noise voltage (RMS)

TJ = 25°C

0.003

%VO

Ripple rejection

VO =10V

CADJ = 0 µF§

57

dB

Ripple rejection

VO = 10 V,

CADJ = 10 µF§

62

64

dB

Long-term stability

TJ = 25°C

0.3

1

%/1k Hrs

† Unless otherwise noted, the following test conditions apply: |VI – VO| = 5 V and IOMAX = 1.5 A, TJ = 0°C to 125°C. Pulse testing techniques are

used to maintain the junction temperature as close to the ambient temperature as possible.

‡ Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input.

§ CADJ is connected between the ADJUST terminal and GND.

NOTE 4: 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.