LM317D2T datasheet(2/12 Pages) ONSEMI

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LM317

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MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Input–Output Voltage Differential

VI–VO

Vdc

Power Dissipation

Case 221A

TA = +25°C

Internally Limited

Thermal Resistance, Junction–to–Ambient

θJA

°C/W

Thermal Resistance, Junction–to–Case

θJC

5.0

°C/W

Case 936 (D2PAK)

TA = +25°C

Internally Limited

Thermal Resistance, Junction–to–Ambient

θJA

°C/W

Thermal Resistance, Junction–to–Case

θJC

5.0

°C/W

Operating Junction Temperature Range

–40 to +125

°C

Storage Temperature Range

Tstg

–65 to +150

°C

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 6), 20 ms Pulse

Regtherm

–

0.03

0.07

% VO/W

Adjustment Pin Current

IAdj

–

100

µA

Adjustment Pin Current Change, 2.5 V

≤ VI–VO ≤ 40 V,

10 mA

≤ IL ≤ Imax, PD ≤ Pmax

1, 2

∆IAdj

–

0.2

5.0

µA

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 4)

Without CAdj

CAdj = 10 µF

–

Long–Term Stability, TJ = Thigh (Note 5), TA = +25°C for

Endpoint Measurements

–

0.3

1.0

%/1.0 k

Hrs.

Thermal Resistance Junction to Case, T Package

RθJC

–

5.0

–

°C/W

NOTES: 1. Tlow to Thigh = 0° to +125°C, for LM317T, D2T.

Tlow to Thigh = –40° to +125°C, for LM317BT, 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. CAdj, when used, is connected between the adjustment pin and ground.

5. 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.

6. 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.

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