LM338 datasheet(3/6 Pages) SEME-LAB

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IP138A SERIES

IP338A SERIES

LM138 SERIES

Prelim. 4/96

Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.

E-mail: sales@semelab.co.uk

Website: http://www.semelab.co.uk

1) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to

heating effects are covered under thermal regulation specifications. Load regulation is measured from the bottom of the package

for the TO–3 package and at the junction of the wide and narrow portion of the output lead for the TO–218 package.

2) Test Conditions unless othewise stated: VIN – VOUT = 5V , TJ = 25°C , IOUT = 2.5A.

Although power dissipation is internally limited, these specifications apply for dissipations of 50W and IMAX = 5A.

VREF

Reference Voltage

DVOUT

Line Regulation 1

DVIN

DVOUT

Load Regulation 1

DIOUT

Thermal Regulation

Ripple Rejection

IADJ

Adjust Pin Current

DIADJ Adjust Pin Current

Change

IMIN

Minimum Load

Current

ISC

Current Limit

DVOUT Temperature

DTEMP Stability

DVOUT

Long Term Stability

DTIME

RMS Output Noise

(% of VOUT)

RqJC

Thermal Resistance

Junction to Case

IOUT = 10mA

IOUT = 10mA to 5A

VIN – VOUT = 3V to 35V

£ 50W

TJ = 0 to +125°C

VIN – VOUT = 3V to 35V

TJ = 0 to +125°C

IOUT = 10mA to 5A

VOUT £ 5V

VOUT ³ 5V

IOUT = 10mA to 5A

VOUT £ 5V

TJ = 0 to +125°C

VOUT ³ 5V

tp = 20ms

CADJ = 0

VOUT = 10V

TJ = 0 to +125°C

f = 120Hz

CADJ = 10mF

TJ = 0 to +125°C

IOUT = 10mA to 5A

VIN – VOUT = 3V to 35V

TJ = 0 to +125°C

VIN – VOUT = 35V

TJ = 0 to +125°C

VIN – VOUT £ 10V

TJ = 0 to +125°C

0.5ms Peak

VIN – VOUT = 30V

TJ = 0 to +125°C

TA = 125°C

t = 1000 Hrs

f = 10 Hz to 10 kHz

K Package (TO–3)

V Package (TO–218)

1.238

1.25

1.262

1.225

1.250

1.270

0.005

0.010

0.020

0.040

515

0.1

0.3

0.6

0.002

0.020

100

0.2

3.5

612

0.25

0.3

0.001

1.190

1.240

1.290

0.005

0.030

0.020

0.060

525

0.1

0.5

0.3

0.002

0.020

100

0.2

3.5

612

0.3

0.003

% / V

%/W

°C/W

LM338

IP338A

IP338

Parameter

Test Conditions

Min.

Typ.

Max.

Min.

Typ.

Max. Units

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