Fairchild Semiconductor LM317T, KA317 Datasheet

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