2

LT138A/LT338A

LM138/LM338

138afb

A

G

A

U

A

R

BSOLUTEXI

TI

S

Power Dissipation .............................. Internally Limited

Input-to-Output Voltage Differential ........................ 35V

Operating Junction Temperature Range

LT138A/LM138 ............................... – 55

°C to 150°C

LT338A/LM338 ................................... 0

°C to 125°C

Storage Temperature Range ................ – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300

°C

100% Thermal Limit Burn-In

(Note 1)

LT138A

LM138

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

Reference Voltage

1.238

1.250

1.262

V

3V

q

1.225

1.250

1.270

1.19

1.24

1.29

V

10mA

Line Regulation

3V

0.005

0.01

0.005

0.01

%/V

q

0.02

0.04

0.02

0.04

%/V

Load Regulation

10mA

5

15

5

15

mV

0.1

0.3

0.1

0.3

%

q

20

30

20

30

mV

q

0.3

0.6

0.3

0.6

%

Thermal Regulation

20ms Pulse

0.002

0.01

0.002

0.01

%/W

Ripple Rejection

q

60

60

dB

q

60

75

60

75

dB

Adjust Pin Current

q

45

100

45

100

µA

Adjust Pin Current Change

10mA

q

0.2

5

0.2

5

µA

3V

Minimum Load Current

q

3.5

5

3.5

5

mA

PACKAGE/ORDER I FOR ATIO

ORDER

PART NUMBER

LT138AK

LT338AK

LM138K

LM338K

ORDER

PART NUMBER

LM338P

ADJ

3

2

1

FRONT VIEW

P PACKAGE

3-LEAD PLASTIC TO-3P

2

1

CASE

IS OUTPUT

ADJ

K PACKAGE

2-LEAD TO-3 METAL CAN

BOTTOM VIEW

Consult LTC Marketing for parts specified with wider operating temperature ranges.

OBSOLETE PACKAGE

Consider the P Package for Alternate Source