1

137afb

LT137A/LM137

LT337A/LM337

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Negative Adjustable

Regulator

deliver up to 1.5A output current over an output voltage

range of –1.2V to –37V. Linear Technology has made

significant improvements in these regulators compared to

previous devices, such as better line and load regulation,

and a maximum output voltage error of 1%.

Every effort has been made to make these devices easy

to use and difficult to damage. Internal current and power

limiting coupled with true thermal limiting prevents device

damage due to overloads or shorts, even if the regulator

is not fastened to a heat sink.

Maximum reliability is attained with Linear Technology’s

advanced processing techniques combined with a 100%

burn-in in the thermal limit mode. This assures that all

device protection circuits are working and eliminates field

failures experienced with other regulators that receive only

standard electrical testing.

Negative Regulator

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

Output Voltage Error

LT137A

ADJ

R2*

*R2 = R1

R2

R1

137A TA01

+

R1

121Ω

C3

1μF

SOLID

TANTALUM

+

C2

5μF

SOLID

TANTALUM

– 1

1.25V

OUTPUT VOLTAGE (V)

12

4

6 8

20

40

12

11

10

9

8

7

6

5

4

3

2

1

0

10

100

137A TA01b

LM337

LT337A

1% RESISTORS

2% RESISTORS