LM317LB datasheet(2/12 Pages) ONSEMI

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LM317, NCV317

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MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Input−Output Voltage Differential

VI−VO

−0.3 to 40

Vdc

Power Dissipation

Case 221A

TA = +25C

Internally Limited

Thermal Resistance, Junction−to−Ambient

qJA

C/W

Thermal Resistance, Junction−to−Case

qJC

5.0

C/W

Case 936 (D2PAK−3)

TA = +25C

Internally Limited

Thermal Resistance, Junction−to−Ambient

qJA

C/W

Thermal Resistance, Junction−to−Case

qJC

5.0

C/W

Operating Junction Temperature Range

−55 to +150

C

Storage Temperature Range

Tstg

−65 to +150

C

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

ELECTRICAL CHARACTERISTICS

(VI−VO = 5.0 V; IO = 0.5 A for D2T and T packages; TJ = Tlow to Thigh (Note 1); Imax and Pmax (Note 2); unless otherwise noted.)

Characteristics

Figure

Symbol

Min

Typ

Max

Unit

Line Regulation (Note 3), TA = +25C, 3.0 V  VI−VO  40 V

Regline

−

0.01

0.04

%/V

Load Regulation (Note 3), TA = +25C, 10 mA  IO  Imax

VO  5.0 V

VO  5.0 V

Regload

−

5.0

0.1

0.5

% VO

Thermal Regulation, TA = +25C (Note 4), 20 ms Pulse

−

Regtherm

−

0.03

0.07

% VO/W

Adjustment Pin Current

IAdj

−

100

Adjustment Pin Current Change, 2.5 V  VI−VO  40 V,

10 mA  IL  Imax, PD  Pmax

1, 2

DIAdj

−

0.2

5.0

Reference Voltage, 3.0 V  VI−VO  40 V, 10 mA  IO  Imax, PD  Pmax

Vref

1.2

1.25

1.3

Line Regulation (Note 3), 3.0 V  VI−VO  40 V

Regline

−

0.02

0.07

% V

Load Regulation (Note 3), 10 mA  IO  Imax

VO  5.0 V

VO  5.0 V

Regload

−

0.3

1.5

% VO

Temperature Stability (Tlow  TJ  Thigh)

−

0.7

−

% VO

Minimum Load Current to Maintain Regulation (VI−VO = 40 V)

ILmin

−

3.5

Maximum Output Current

VI−VO  15 V, PD  Pmax, T Package

VI−VO = 40 V, PD  Pmax, TA = +25C, T Package

Imax

1.5

0.15

2.2

0.4

−

RMS Noise, % of VO, TA = +25C, 10 Hz  f  10 kHz

−

0.003

−

% VO

Ripple Rejection, VO = 10 V, f = 120 Hz (Note 5)

Without CAdj

CAdj = 10 mF

−

Thermal Shutdown (Note 6)

−

180

−

C

Long−Term Stability, TJ = Thigh (Note 7), TA = +25C for

Endpoint Measurements

−

0.3

1.0

%/1.0

kHrs.

Thermal Resistance Junction−to−Case, T Package

−

RqJC

−

5.0

−

C/W

1. Tlow to Thigh = 0 to +125C, for LM317T, D2T. Tlow to Thigh = −40 to +125C, for LM317BT, BD2T, Tlow to Thigh = −55 to +150C, for

NCV317BT, BD2T.

2. Imax = 1.5 A, Pmax = 20 W

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. Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die.

These effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these

temperature gradients on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.

5. CAdj, when used, is connected between the adjustment pin and ground.

6. Thermal characteristics are not subject to production test.

7. 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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