©2000 Fairchild Semiconductor International Rev. B, May 2000

LM

317T (K

A317)

LM317T (KA317)Adjustable Voltage Regulator (Positive)

3-TERMINAL POSITIVE ADJUSTABLE REGULATOR

This monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply 2.2A typical of load current with an output voltage adjustable over a 1.2 to 37V. It employs internal current limiting, thermal shut-down and safe area compensation.

FEATURES

• Output Current 2.2A Typical• Output Adjustable Between 1. 2V and 37V• Internal Thermal-Overload Protection• Internal Short-Circuit Current-Limiting• Output Transistor Sate-Area Compensation• TO-220 Package

ORDERING INFORMATION

Device Package Operating Temperature

LM317T (KA317) TO-220 0°C ~ +125°C

BLOCK DIAGRAM

Vin 3

1

Vadj

2 Vo

Rlimit

VoltageReference

ProductionCircuitry

+

-

TO-220

©2000 Fairchild Semiconductor International Rev. B, May 2000

LM

317T (K

A317)

ABSOLUTE MAXIMUM RATINGS

(T

A

= +25°C, unless otherwise specified)

ELECTRICAL CHARACTERISTICS

(V

I

- V

O

= 5V, I

O

= 0.5A, 0°C

≤

T

J

≤

+125°C, I

MAX

= 1.5A, P

MAX

= 20W, unless otherwise specified)

* Load and line regulation are specified at constant junction temperature. Change in V

D

due to heating effects must be taken into account separately. Pulse testingwith low duty is used. (P

MAX

= 20W)

Characteristic Symbol Value Unit

Input-Output Voltage Differential V

I

- V

O

40 V

Lead Temperature T

LEAD

230 °C

Power Dissipation P

D

Internally limited W

Operating Temperature Range T

OPR

0 ~ +125 °C

Storage Temperature Range T

STG

-65 ~ +125 °C

Temperature Coefficient of Output Voltage V

O

/T 0.02 %/°C

Characteristic Symbol Test Conditions Min Typ Max Unit

Line Regulation Rline T

A

= +25°C 3V

≤

V

I

- V

O

≤

40V 0.01 0.04 %/V

3V

≤

V

I

- V

O

≤

40V 0.02 0.07 %/V

Load Regulation Rload T

A

= +25°C, 10mA

≤

I

O

≤

I

MAX

V

O

< 5V V

O

≥

5V180.4

250.5

mV%/V

O

10mA

≤

I

O

≤

I

MAX

V

O

< 5V V

O

≥

5V400.8

701.5

mV%/V

O

Adjustable Pin Current I

ADJ

46 100 µA

Adjustable Pin Current Change

∆

I

ADJ

3V

≤

V

I

- V

O

≤

40V10mA

≤

I

O

≤

I

MAX

P

≤

P

MAX

2.0 5 µA

Reference Voltage V

REF

3V

≤

V

IN

- V

OUT

≤

40V10mA

≤

I

O

≤

I

MAX

P

D

≤

P

MAX

1.20 1.25 1.30 V

Temperature Stability ST

t

0.7 %/V

O

Minimum Load Current to Maintain Regulation

L

(MIN)

V

I

- V

O

= 40V 3.5 12 mA

Maximum Output Current I

O(MAX)

V

I

- V

O

≤

15V, P

D

≤

P

MAX

V

I

- V

O

≤

40V, P

D

≤

P

MAX

, T

A

= 25°C1.0 2.2

0.3A

RMS Noise, % of V

OUT

e

N

T

A

= +25°C, 10Hz

≤

f

≤

10KHz 0.003 0.01 %/V

O

Ripple Rejection RR V

O

= 10V, f = 120Hz without C

ADJ

C

ADJ

= 10µF 666075

dB

Long-Term Stability, T

J

= T

HIGH

ST T

A

= +25°C for end point measurements, 1000HR

0.3 1 %

Thermal Resistance Junction to Case

R

θ

JC

5 °C/W

©2000 Fairchild Semiconductor International Rev. B, May 2000

LM

317T (K

A317)

TYPICAL PERFORMANCE CHARACTERISTICS

Fig. 1 Load Regulation

Fig. 3 Dropout Voltage

Fig. 2 Adjustment Current

OUTP

UT V

OLTA

GE D

EVIA

TION

(%)

Adju

stm

ent C

urre

nt (µ

A)

TEMPERATURE (°C)

-1.0

-0.8

-0.6

-0.4

-0.2

0

0.2

0 25 50 12510075

Fig. 4 Reference Voltage

IL = 0.5A

IL = 1.5A

35

40

45

50

55

-50 -25 0 12510025 50 75

INPU

-OUT

PUT

VOLT

AGE

DIFF

EREN

TIAL

(V)

REFE

RENC

E VO

LTAG

E (V

)

TEMPERATURE (°C)

TEMPERATURE (°C)

TEMPERATURE (°C)

1

1.5

2

2.5

3

0 25 50 12510075

IL = 1.5A∆Vo = 100mV

IL = 1A

IL = 20mA

IL = 200mA

IL = 500mA

1.235

1.245

1.24

1.25

1.255

1.26

-50 -25 0 12510025 50 75

©2000 Fairchild Semiconductor International Rev. B, May 2000

LM

317T (K

A317)

Typical Application

Fig. 5 Programmable Regulator

C

i

is required when regulator is located at an appreciable distance from the power supply filter.C

o

improves transient response by reducing AC noise which is present at the output.Since I ADJ is controlled to less than 100µA, the error associated with this term is negligible in most applications.

VI

Vo = 1.25V (1 + R2/R1) + Iadj R2

KA317VI Vo

R1

Iadj

adj

0.1µF

R2

Co

0.1µFCi

Vadj

©2000 Fairchild Semiconductor International Rev. B, May 2000

LM

317T (K

A317)

Dimensions in Millimeters

August 1999, Rev B

TO-220 Package Dimensions

4.50 ±0.209.90 ±0.20

1.52 ±0.10

0.80 ±0.102.40 ±0.20

10.00 ±0.20

1.27 ±0.10

ø3.60 ±0.10

(8.70)

2.80

±0.

1015

.90

±0.2

0

10.0

8 ±0

.30

18.9

5MA

X.

(1.7

0)

(3.7

0)(3

.00)

(1.4

6)

(1.0

0)

(45°)

9.20

±0.

2013

.08

±0.2

0

1.30

±0.

10

1.30+0.10–0.05

0.50+0.10–0.05

2.54TYP[2.54 ±0.20]

2.54TYP[2.54 ±0.20]

TO-220 (FS PKG CODE AE)

©2000 Fairchild Semiconductor International Rev. E

TRADEMARKS

The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and isnot intended to be an exhaustive list of all such trademarks.

ACEx™Bottomless™CoolFET™CROSSVOLT™E

2

CMOS™FACT™FACT Quiet Series™FAST

®

FASTr™GTO™

HiSeC™ISOPLANAR™MICROWIRE™POP™PowerTrench

®

QFET™QS™Quiet Series™SuperSOT™-3SuperSOT™-6

SuperSOT™-8SyncFET™TinyLogic™UHC™VCX™

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANYPRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANYLIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORTDEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTORCORPORATION.As used herein:

1. Life support devices or systems are devices or systemswhich, (a) are intended for surgical implant into the body,or (b) support or sustain life, or (c) whose failure to performwhen properly used in accordance with instructions for useprovided in the labeling, can be reasonably expected toresult in significant injury to the user.

2. A critical component is any component of a life supportdevice or system whose failure to perform can bereasonably expected to cause the failure of the life supportdevice or system, or to affect its safety or effectiveness.

PRODUCT STATUS DEFINITIONS

Definition of Terms

Datasheet Identification Product Status Definition

Advance Information Formative or In Design

This datasheet contains the design specifications forproduct development. Specifications may change inany manner without notice.

Preliminary First Production This datasheet contains preliminary data, andsupplementary data will be published at a later date.Fairchild Semiconductor reserves the right to makechanges at any time without notice in order to improvedesign.

No Identification Needed Full Production This datasheet contains final specifications. FairchildSemiconductor reserves the right to make changes atany time without notice in order to improve design.

Obsolete Not In Production This datasheet contains specifications on a productthat has been discontinued by Fairchild semiconductor.The datasheet is printed for reference information only.