Bel Fuse Inc.

206 Van Vorst Street, Jersey City, NJ 07302

• Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com

NON-ISOLATED DC/DC CONVERTERS

3 Vdc - 3.6 Vdc Input

12 Vdc/0.8 A & 15 Vdc/0.6 A Output

General Specifications

Parameter

Min

Typ

Max

Notes

Efficiency

82%

81%

86%

85%

-

-

Measured at Vin=3.3 V, full load

Switching Frequency

500 kHz

550 kHz

650 kHz

Output Trim Range

-

MTBF

13,296,605 hours

Calculated Per Bell Core SR-332

°C)

Dimensions (surface mount)

Inches (L × W × H)

Millimeters (L × W × H)

0.78 x 0.7 x 0.32

19.81 x 17.78 x 8.13

Dimensions (vertical)

Inches (L × W × H)

Millimeters (L × W × H)

0.7 x 0.308 x 0.65

17.78 x 7.82 x 16.51

Weight

-

5.2 g

-

Note

Output Trim Equations

Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal

output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between

the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of

the resistors should be used for any given application.

B

V

V

A

R

adj

nom

down

trim

−

−

=

−

D

V

V

C

R

nom

adj

up

trim

−

−

=

−

Vnom

A

B

C

D

12

164.640

21.850

11.760

7.150

15.055

209.542

20.600

11.760

5.900

Vout

Trim

GND

Rtrim-down

Module

Vout

Trim

GND

Rtrim-up

Module