UTC UTCLM317L Datasheet

U T C LM317L LINEAR INTEGRATED CIRCUIT

LOW CURRENT 1.25V TO 37V
ADJUSTABLE VOLTAGE
REGULATOR

DESCRIPTION

The UTC LM317L is a monolithic integrated
circuit, designed for use as positive adjustable voltage
regulator. It is designed to supply until 100mA of load
current with an output voltage adjustable over a 1.25V
to 37V range.

FEATURES

*Output voltage range: 1.25V to 37V
*Output current in excess of 100mA
*Line regulation typ. 0.01%
*Load regulation typ. 0.1%
*Thermal overload protection
*Short circuit protection
*Output transistor safe area compensation
*Floating operation for high voltage applications

PIN CONFIGURATIONS

3

21

ADJUST

TO-92 Plastic Package

Bottom View

OUT

IN

1

VIN

2

VOUT

VOUT

ADJ

LM317L

3

4

SOP-8 PACKAGE

UTC

SOP-8

1

TO-92

8

NC

VOUT

7

VOUT

6

5

NC

ABSOLUTE MAXIMUM RATING

PARAMETER SYMBOL VALUE UNIT

Input-Output Differential Voltage Vi-Vo 40 V
Power Dissipation Pd Internally Limited
Operating Junction Temperature Range Topr 0~125 °C
Storage Temperature Range Tstr -55 ~ 150 °C

UTC UNISONIC TECHNOLOGIES CO., LTD. 1

QW-R101-008,A

U T C LM317L LINEAR INTEGRATED CIRCUIT

SCHEMATIC DIAGRAM

INPUT

R16

Q22

D2

R19

Q25

R17

R21

C3

R20

R18

R22

Q26

R23

D3

R24

R25

R26

OUTPUT
ADJUST

R1 R2 R3 R4 R5

Q1

Q2

R6 Q4

D1

Q3

Q8

R7Q6R8

Q9

Q7

Q5

R10 R11 R12

R9

Q10

Q11 Q12

Q13

R13

Q15

Q14

C1

Q18

Q16

Q17

C2

Q20

Q19

Q21

R15

R14

TEST CIRCUIT

Vi Vo

3 2

LM317L

R1

Cout

1µF

Cin

0.1µF

1

Vref

Iadj

R2

UTC UNISONIC TECHNOLOGIES CO., LTD. 2

QW-R101-008,A