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Specifications subject to change without notice.

K78LXX-500

B/0-2012

Page 2 of 5

TYPICAL TEMPERATURE CURVE

EXTERNAL CAPACITOR TABLE

Operating Temp.(

)

C

Temperature Derating Graph

(figure 1)

Part

Number

C1

(ceramic capacitor)

C2

(ceramic capacitor)

K78L03-500

10

μF/50V

22

μF/16V

K78L05-500

10

μF/50V

22

μF/16V

K78LX6-500

10

μF/50V

10

μF/16V

K78L09-500

10

μF/50V

10

μF/16V

K78L12-500

10

μF/50V

10

μF/25V

K78L15-500

10

μF/50V

10

μF/25V

STANDARD APPLICATION CIRCUIT

1.C 1 an d C2 ar e re quir ed and should b e fi tted clo se to the co nve rter pins.

2.T he c apacitance of C1 , C2 s ees ext ernal ca pac itor table,it can be incr eas ed

pr op er ly if requi r ed, and.

3.

tantalu m o r low ES R e lectrolytic c apacitor s m ay also suffice

N o paral lel c onn ecti on or plug and p lay.

4.O utp ut c an n ot s hor t-cir cuit,or i t ma y cause per manent dam ag e to the dev ice.

Note:

+Vin

G ND

G ND

K 78 LX X-5 00

1

2

3

+ Vout

C1

C2

+

+

(figure 2)

TEST CONFIGURATIONS (TA=25

°C)

1

Efficiency and Output Voltage Ripple Test

Sc ope

C e ram ic

3

+Vin

GND

+V out

C2

C1

25 .4mm

1

DC/DC

Converter

2

25 .4 mm

1 2.7 mm

1F

μ

1 0F

μ

Ta nta lum

Coppe r strip

Co pper s trip

(figure 3)

2

Start-up and Load Transient Response Test

3

+Vin

G ND

+V out

C2

C1

50 .8 mm

1

DC/DC

Con verter

2

Sc ope

Cop pe r strip

Cop pe r strip

(figure 4)