rev.

page

date

DESCRIPTION: dc/dc converter

2 of 3

02/2008

20050

phone

phone 503.612.2300 fax

fax 503.612.2382

PART NUMBER: VWRAS2 series

Recommended circuit

It is best to test with full load and not to test

without load. To further reduce output ripple,

you may increase the external capacitor,

choose a capacitor with low ESR, or add

external inductor to the circuit as shown on

the left.

General:

Cin: 5V, 12V 100µF

24V, 48V 10µF ~ 47µF

Cout:100µF(typ)

Lin: 4.7µH ~ 120 µH

Lout: 2.2µH ~ 10µH

General Specifications

Output short circuit protection

Continuous

Temperature rise at full load

15°C typ., 35°C max.

Cooling

Free air convection

No-load power consumption

100mW (typical)

Operating temperature range

-40°C to +85°C

Storage temperature range

-50°C to +125°C

Soldering temperature

300°C (1.5mm from case for 10sec.)

Storage humidity range

<95%

Case material

Plastic (UL94-V0)

MTBF

>1,000,000 hrs.

Isolation Specifications

Item

Test Conditions

Min.

Typ.

Max.

Units

Isolation Voltage

Flash tested for 1 min.

1500

Vdc

Isolation Resistance

Test at 500 Vdc

1000

M

Ω

Isolation Capacitance

Input/Output

80

PF

Typical Characteristics

+Vo

0V

Cou t

Cin

Vin

GND

2

1

6

8

3

R

R:KΩ

＝

Vc

R

Li n

7

Cou t

L

L

-Vo

FOOTPRINT DETAILS

RECOMMENDED FOOTPRINT

diameter:1.00mm

Note:

Unit:mm(inch)

Pin section:0.50*0.30mm(0.020*0.012inch)

Pin tolerances: 0.10mm( 0.004inch)

General tolerances: 0.25mm( 0.010inch)

+

+

+

+

Dual Output & Single Output

Pin

Dual

1

2

3

5

GND

Vin

+Vo

NC

OV

7

8

6

CTRL

-Vo

(0.866)

23

5

26 7 8

1

NC:No Connection

First Angle Projection

35

Outline Dimensions &

Recommended Layout Pattern