cui.com

date

11/23/2011 │ page 4 of 6

CUI Inc

│ SERIES: V78-1000-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR

TYPICAL APPLICATION CIRCUIT

REFLOW SOLDERING PROFILE

APPLICATION EXAMPLE

DERATING CURVE

0

20

40

60

80

100

120

-40

0

40

85

120

71

Safe Operating Area

Operating Temperature (°C)

V7805-1000-SMT

1

7,9

5

Vin

GND

Vo u t

C2

C1

6

10

ON/OFF

R1

R2

GND

470pF

C4

7,9

5

Vin

GND

+Vo u t

1

C1

22

F

6

C4

470pF

L

C2

DC/DC

Converter

0

50

100

150

200

250

90

M a x

(>2 2 0 C)

Se c

220 C

10

M ax

Se c

P eak .Tem p 2 40 C

Time (seconds)

1. C1 and C2 are required for best performance and should

be fitted close to the converter pins.

2. See the capacitor values for C1 and C2 in the external

capacitor table below. These can be increased if required

and tantalum or low ESR electrolytic capacitors will also

suffice.

3. No parallel connection or plug and play.

To reduce output ripple, it is recommended to add a LC filter to the

output port.

L: Recommended parameter 10 ~ 47μH.

EXTERNAL CAPACITOR TABLE

MODEL

C1 (Ceramic)

C2 (Ceramic)

V7802-1000-SMT

10 μF / 25 V

22 μF / 16 V

V7803-1000-SMT

10 μF / 25 V

22 μF / 16 V

V7805-1000-SMT

10 μF / 25 V

22 μF / 16 V

V7806-1000-SMT

10 μF / 25 V

22 μF / 16 V