UTC LM317 Datasheet

UTC LM317 LINEAR INTEGRATED CIRCUIT

3-TERMINAL 1A POSITIVE
ADJUSTABLE VOLTAGE
REGULATOR

DESCRIPTION

The UTC LM317 is an adjustable 3-terminal positive
voltage regulator, designed to supply more than 1.5A of
output current with voltage adjustable from 1.3 to 37V.

FEATURES

*Output current up to 1.5A.
*Output voltage adjustable from 1.3V to 37V.

*Internal short circuit protection.
*Internal over temperature protection.
*Safe-Area compensation for output transistor.

BLOCK DIAGRAM

INPUT

1

TO-220

1

TO-263

1

TO-252

1:ADJ 2:Output 3:Input

PROTECTION

VREF

VAdj

CIRCUIT

OUTPUT

UTC UNISONIC TECHNOLOGIES CO., LTD. 1

QW-R101-009,B

UTC LM317 LINEAR INTEGRATED CIRCUIT

ABSOLUTE MAXIMUM RATINGS(Ta=25°C, UNLESS OTHERWISE SPECIFIED)

PARAMETER SYMBOL VALUE UNIT

Input - Output Voltage Difference VI-VO 40 V
Lead Temperature TLEAD 230 °C
Power Dissipation PD Internal limited
Operating Temperature Range TOPR 0~125 °C
Storage Temperature Range TSTG -65~150 °C

ELECTRICAL CHARACTERISTICS

(VI-VO=5V, 0°C <Tj<125°C,IO=500mA,IMAX=1.5A,PMAX=20W , unless otherwise specified)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Line Regulation ∆VO Ta=25°C,3V<=VI-VO<=40V 0.01 0.04 %/V

Ta=0 - 125°C,3V<=VI-VO<=40V 0.02 0.07 %/V

Ta=25°C VO<=6V 18 25 mV

Load Regulation ∆VO 10mA<=IO<=IMAX VO>=5V 0.4 0.5 %/VO

10mA<=IO<=IMAX VO<=5V 40 70 mV

VO>=6V 0.8 1.5 %/VO
Adjustable Pin Current IADJ 46 100 µA
Adjustable Pin Current
Change
Reference Voltage VREF 3V<=VI-VO<=40V,

Temperature Stability STT 0.7 %/VO
Minimum Load Current
for Regulation
Maximum Output
Current

RMS Noise v.s.
%of Vout
Ripple Rejection RR VO=10V,f=120HZ, 60 dB

Long-term Stability,
TJ=THIGH
Junction to Case
Thermal Resistance
Note: Testing with low duty pulse should be used to avoid heating effect.

∆IADJ 2.5V<=VI-VO<=40V,

10mA<=Io<=IMAX, PD<=PMAX

1.20 1.25 1.30 V

10mA<=IO<=IMAX,PD<=PMAX

IL(MIN) VI-VO=40V 3.5 10 mA

IO(MAX) VI-VO<=15V, PD<=PMAX 1.5 2.2 A

VI-VO<=15V, PD<=PMAX,Ta=25°C 0.15 0.4

eN TA=25°C,10HZ<=f<=10KHZ 0.003 0.01 %/VO

VO=10V,f=120HZ,CADJ=10µF 66 75

ST TA=25°C,1000 hr 0.3 1 %

R θ JC 5 °C/W

2.0 5 µA

UTC UNISONIC TECHNOLOGIES CO., LTD. 2

QW-R101-009,B