NEGATIVE ADJUSTABLE

VOLTAGE REGULATOR

Semelab Limited reserves the right to change test conditions, parameter limits and package dimensions without notice.

Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However

Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to

verify that datasheets are current before placing orders.

Semelab Limited

Semelab Limited

Semelab Limited

Semelab Limited

Coventry Road, Lutterworth, Leicestershire, LE17 4JB

Telephone +44 (0) 1455 556565

Fax +44 (0) 1455 552612

Document Number 8211

Issue 2

Page 1 of 5

IP137SMD

/ LM137SMD

IP137ASMD

/ LM137ASMD

IP137HVSMD / LM137HVSMD

IP137AHVSMD / LM137AHVSMD

C = 25°C unless otherwise stated)

Standard

40V

VI - VO

Input – Output Voltage Differential

HV Series

50V

IO

Output Current

Internally Limited

PD

Power Dissipation

Internally Limited

TJ

Operating Junction Temperature Range

-55 to +150°C

Tstg

Storage Temperature Range

-65 to +150°C

THERMAL PROPERTIES

Symbols

Parameters

Min.

Typ.

Max.

Units

RθJC

Thermal Resistance, Junction To Case

3.5

°C/W

** This datasheet supersedes document 2831

DESCRIPTION

The 137 Series regulators are adjustable 3 terminal voltage regulators capable of supplying in excess of -1.5A over an output

voltage range of -1.2V to -37V (HV Series, -47V). The regulators are exceptionally easy to apply requiring only 2 external

resistors to set the output voltage and 1 output capacitor for frequency compensation.

Every effort has been made to make these devices easy to use and difficult to damage. Internal current limiting and power

limiting coupled with true thermal limiting prevents damage due to overloads or shorts, even if the regulators are not fastened

to a heat sink.

FEATURES

•

1.5A Output Current Guaranteed

•

Internal Thermal Overload Protection

•

Output Short Circuit Protected

•

Hermetic Ceramic Surface Mount Package

•

Screening Options Available

APPLICATIONS

•

Adjustable Power Supplies

•

System Power Supplies

•

Precision Voltage / Current Regulators