Datasheet LM317T, KA317 Datasheet (Fairchild Semiconductor)

LM317T (KA317)

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 shut­down and safe area compensation.

TO-220

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

BLOCK DIAGRAM

Vin 3

ORDERING INFORMATION

Device Package Operating Temperature

LM317T (KA317) TO-220 0°C ~ +125°C

+

-

Voltage

Reference

1

Vadj

©2000 Fairchild Semiconductor International Rev. B, May 2000

Production

Circuitry

Rlimit

2

Vo

≤

≤

≤

≤

≥

≤

≥

∆

≤

≤

P ≤

≤

≤

≤

≤

≤

≤

≤

θ

LM317T (KA317)

ABSOLUTE MAXIMUM RATINGS (T

Characteristic Symbol Value Unit

Input-Output Voltage Differential V

Lead Temperature T

Power Dissipation P

Operating Temperature Range T

Storage Temperature Range T

Temperature Coefficient of Output Voltage V

ELECTRICAL CHARACTERISTICS

(V

- V

= 5V, I

I

O

Line Regulation Rline T

Load Regulation Rload T

Adjustable Pin Current I

Adjustable Pin Current Change

Reference Voltage V

Temperature Stability ST

Minimum Load Current to
Maintain Regulation

Maximum Output Current I

RMS Noise, % of V

Ripple Rejection RR V

Long-Term Stability, T

Thermal Resistance Junction to
Case

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

with low duty is used. (P

= 0.5A, 0°C ≤ T

O

+125°C, I

J

Characteristic Symbol Test Conditions Min Typ Max Unit

ADJ

I

L

(MIN)

O(MAX)

OUT

= T

J

HIGH

e

ST T

R

= 20W)

MAX

= +25°C, unless otherwise specified)

A

- V

I

O

LEAD

D

OPR

STG

/T 0.02 %/°C

O

ADJ

REF

N

t

= 1.5A, P

MAX

= +25°C 3V ≤ V

A

= +25°C, 10mA ≤ I

A

V

< 5V

O

V

5V

O

10mA ≤ I
V

< 5V

O

V

5V

O

3V ≤ V
10mA ≤ I

P

MAX

3V ≤ V
10mA ≤ I
P

P

D

V

- V

I

O

V

- V

I

O

V

- V

I

O

T

= +25°C, 10Hz ≤ f ≤ 10KHz 0.003 0.01 %/V

A

= 10V, f = 120Hz

O

without C
C

= 10µF 66

ADJ

= +25°C for end point

A

= 20W, unless otherwise specified)

MAX

- V

I

3V ≤ V

- V

I

I

O

MAX

I

O

MAX

- V

40V

I

O

I

O

MAX

IN

MAX

- V

40V

OUT

I

O

MAX

= 40V 3.5 12 mA

15V, P

40V, P

ADJ

P

D

MAX

P

MAX

, T

D

measurements, 1000HR

JC

due to heating effects must be taken into account separately. Pulse testing

D

40 V

230 °C

Internally limited W

0 ~ +125 °C

-65 ~ +125 °C

40V 0.01 0.04 %/V

O

40V 0.02 0.07 %/V

O

18

0.4250.5mV%/V

40

0.8701.5mV%/V

46 100 µA

2.0 5 µA

1.20 1.25 1.30 V

0.7 %/V

1.0 2.2

= 25°C

A

0.3

60
75

0.3 1 %

5 °C/W

O

O

O

A

O

dB

©2000 Fairchild Semiconductor International Rev. B, May 2000

TYPICAL PERFORMANCE CHARACTERISTICS

LM317T (KA317)

Fig. 1 Load Regulation

0.2

0

-0.2

-0.4

-0.6

-0.8

OUTPUT VOLTAGE DEVIATION (%)

-1.0
0 25 50 12510075

TEMPERATURE (°C)

Fig. 3 Dropout Voltage

3

∆Vo = 100mV

2.5

2

1.5

1

INPU-OUTPUT VOLTAGE DIFFERENTIAL (V)

0 25 50 12510075

TEMPERATURE (°C)

IL = 1.5A

IL = 1A

I

L

IL = 0.5A

IL = 1.5A

= 500mA

IL = 200mA

IL = 20mA

Fig. 2 Adjustment Current

55

50

45

40

Adjustment Current (µA)

35

-50 -25 0 12510025 50 75

TEMPERATURE (°C)

Fig. 4 Reference Voltage

1.26

1.255

1.25

1.245

1.24

REFERENCE VOLTAGE (V)

1.235

-50 -25 0 12510025 50 75

TEMPERATURE (°C)

©2000 Fairchild Semiconductor International Rev. B, May 2000

Typical Application

LM317T (KA317)

VI

Ci

0.1µF

Fig. 5 Programmable Regulator

C

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

i

C

improves transient response by reducing AC noise which is present at the output.

o

Since I ADJ is controlled to less than 100µA, the error associated with this term is negligible in most applications.

VI Vo

KA317

Vadj

R1

Iadj

R

2

adj

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

Co

0.1µF

©2000 Fairchild Semiconductor International Rev. B, May 2000

TO-220 Package Dimensions

TO-220 (FS PKG CODE AE)

LM317T (KA317)

(1.70)

9.20 ±0.2013.08 ±0.20

1.30 ±0.10

(1.46)

(1.00)

1.27 ±0.10

9.90 ±0.20

(8.70)

ø3.60 ±0.10

(3.70)(3.00)

(45°)

1.52 ±0.10

2.80 ±0.1015.90 ±0.20

18.95MAX.

4.50 ±0.20

+0.10

1.30

–0.05

10.08 ±0.30

2.54TYP

±0.20]

[2.54

0.80 ±0.10

2.54TYP

±0.20]

[2.54

0.50

+0.10
–0.05

2.40 ±0.20

10.00 ±0.20

Dimensions in Millimeters

August 1999, Rev B

©2000 Fairchild Semiconductor International Rev. B, May 2000

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As used herein:

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which, (a) are intended for surgical implant into the body,
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when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
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2. A critical component is any component of a life support
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PRODUCT STATUS DEFINITIONS

Definition of Terms

Datasheet Identification Product Status Definition

Advance Information Formative or In

Design

Preliminary First Production This datasheet contains preliminary data, and

No Identification Needed Full Production This datasheet contains final specifications. Fairchild

Obsolete Not In Production This datasheet contains specifications on a product

©2000 Fairchild Semiconductor International Rev. E

This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.

supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.

Semiconductor reserves the right to make changes at
any time without notice in order to improve design.

that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.