LM317T datasheet(2/6 Pages) FAIRCHILD | Adjustable Voltage Regulator (Positive)

2 page

Rev. B, May 2000

ABSOLUTE MAXIMUM RATINGS (TA= +25°C, unless otherwise speciﬁed)

ELECTRICAL CHARACTERISTICS

(VI - VO = 5V, IO = 0.5A, 0°C ≤ TJ ≤ +125°C, IMAX = 1.5A, PMAX = 20W, unless otherwise specified)

Load and line regulation are specified at constant junction temperature. Change in VD due to heating effects must be taken into account separately. Pulse testing

with low duty is used. (PMAX = 20W)

Characteristic

Symbol

Value

Unit

Input-Output Voltage Differential

VI - VO

Lead Temperature

TLEAD

230

°C

Power Dissipation

Internally limited

Operating Temperature Range

TOPR

0 ~ +125

°C

Storage Temperature Range

TSTG

-65 ~ +125

°C

Temperature Coefﬁcient of Output Voltage

VO/T

0.02

%/°C

Characteristic

Symbol

Test Conditions

Min

Typ

Max

Unit

Line Regulation

Rline

TA = +25°C

≤ VI - VO ≤ 40V

0.01

0.04

%/V

≤ VI - VO ≤ 40V

0.02

0.07

%/V

Load Regulation

Rload

TA = +25°C, 10mA ≤ IO ≤ IMAX

VO < 5V

VO ≥ 5V

0.4

0.5

%/VO

10mA

≤ IO ≤ IMAX

VO < 5V

VO ≥ 5V

0.8

1.5

%/VO

Adjustable Pin Current

IADJ

100

µA

Adjustable Pin Current Change

∆IADJ

≤ VI - VO ≤ 40V

10mA

≤ IO ≤ IMAX

≤ PMAX

2.0

µA

Reference Voltage

VREF

≤ VIN - VOUT ≤ 40V

10mA

≤ IO ≤ IMAX

PD ≤ PMAX

1.20

1.25

1.30

Temperature Stability

STt

0.7

%/VO

Minimum Load Current to

Maintain Regulation

L(MIN)

VI - VO = 40V

3.5

Maximum Output Current

IO(MAX)

VI - VO ≤ 15V, PD ≤ PMAX

VI - VO ≤ 40V, PD ≤ PMAX, TA = 25°C

1.0

2.2

0.3

RMS Noise, % of VOUT

TA= +25°C, 10Hz ≤ f ≤ 10KHz

0.003

0.01

%/VO

Ripple Rejection

VO = 10V, f = 120Hz

without CADJ

CADJ = 10µF

Long-Term Stability, TJ = THIGH

TA = +25°C for end point

measurements, 1000HR

0.3

Thermal Resistance Junction to

Case

RθJC

°C/W

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