LM317CM datasheet(2/6 Pages) VISHAY

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Part Number

Vishay Semiconductor

www.vishay.com

Document Number 74809

2

29-Nov-01

Electrical Characteristics – LM317

Vi -Vo =5V, Io = 0.5A, TJ = Tlow to Thigh (see Note 1), Imax and Pmax per Note 2, unless otherwise noted.

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Line Regulation (Fig. 1)(3)

REGline

TA = 25°C

–

0.01

0.04

%Vo/V

3.0V

≤ VI – Vo ≤ 40V

TJ = 0°C thru 125°C

–

0.02

0.07

Load Regulation (Fig. 2)(3)

REGload

Vo

≤ 5.0

–

525

mV

TJ = 25°C, 10mA

≤ Io ≤ 1.5A

Vo

≥ 5.0

–

0.1

0.5

%Vo

Load Regulation (Fig. 2)(3)

REGload

Vo

≤ 5.0

–

20

70

mV

10mA

≤ Io ≤ 1.5A

Vo

≥ 5.0

–

0.3

1.5

%Vo

Thermal Regulation

REGtherm

TJ = 25°C, 20ms Pulse

–

0.03

0.07

%Vo/W

Adjustment Pin Current (Fig. 3)

IAdj

–

50

100

µA

Adjustment Pin Current Change

∆IAdj

10mA

≤ IL ≤ 1.5A

–

0.2

5

µA

2.5V

≤ VI – Vo ≤ 40V

Reference Voltage (Fig. 3)(4)

Vref

10mA

≤ Io ≤ 1.5A

1.225

1.25

1.275

V

3V

≤ VI – Vo ≤ 40V

Temperature Stability (Fig. 3)

TS

Tlow

≤ TJ ≤ Thigh

–

1

–

%Vo

Min. Load Current to Maintain Regulation (Fig. 3)

ILmin

VI – Vo = 40V

–

3.5

10

mA

Maximum Output Current (Fig. 3)

Imax

VI – Vo

≤ 15V

1.5

2.2

–

A

VI – Vo = 40V, TJ = 25°C

0.15

0.4

–

RMS Noise, % of Vo

N

TJ = 25°C, 10HZ

≤ f ≤ 10KHZ

—

0.003

–

%Vo

Ripple Rejection (Fig. 4)

RR

Vo = 10V, f = 120HZ

(5)

—

65

–

dB

CAdj = 10

µF66

80

–

Long-Term Stability (after 1000 hr) Fig. 3

S

TJ = 125°C

(6)

, TJ = 25°C for

–

0.3

1.0

%

Endpoint Measurements

Thermal Resistance Junction to Case

R

θJC

Tlow

≤ TJ ≤ Thigh

–

5.0

–°C/W

Notes:

(1) Tlow = 0°C Thigh = 125°C

(2) Imax = 1.5A Pmax : TO-220 = 2W, TO-263 = 2W

(3) Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account separately.

Pulse testing with low duty cycle is used.

(4) Selected devices with tightened tolerance reference voltage available.

(5) CAdj, when used, is connected between the addjustment pin and ground.

(6) Since Long-Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability from lot to lot.

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