VI - VO = 5 V, IO = 500 mA, IMAX = 1.5 A and PMAX = 20 W, TJ = 0 to 125 °C, unless otherwise specified.

Table 4. Electrical characteristics for LM317

Symbol

Parameter

Test conditions

Min.

Typ.

Max. Unit

ΔVO

Line regulation

VI - VO = 3 to 40 V

TJ = 25°C

0.01

0.04

%/V

0.02

0.07

ΔVO

Load regulation

VO ≤ 5 V

IO = 10 mA to IMAX

TJ= 25°C

5

25

mV

20

70

VO ≥ 5 V,

IO = 10 mA to IMAX

TJ = 25°C

0.1

0.5

%

0.3

1.5

IADJ

Adjustment pin current

50

100

µA

ΔIADJ

Adjustment pin current

VI - VO = 2.5 to 40 V

IO = 10 mA to IMAX

0.2

5

µA

VREF

Reference voltage (between pin 3 and pin 1)

VI - VO = 2.5 to 40 V

IO = 10 mA to IMAX

PD ≤ PMAX

1.2

1.25

1.3

V

ΔVO/VO

Output voltage temperature stability

1

%

IO(min)

Minimum load current

VI - VO = 40 V

3.5

10

mA

IO(max)

Maximum load current

VI - VO ≤ 15 V, PD < PMAX

1.5

2.2

A

VI - VO = 40 V, PD < PMAX, TJ = 25°C

0.4

eN

Output noise voltage (percentage of VO)

B = 10 Hz to 100 kHz, TJ = 25°C

0.003

%

SVR

Supply voltage rejection (1)

TJ = 25°C, f = 120 Hz

CADJ = 0

65

dB

CADJ = 10 µF

66

80

1. CADJ is connected between adjust pin and ground.

LM217, LM317

Electrical characteristics

DS0433 - Rev 22

page 6/34