Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302

2

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 13.8 Vdc Input

0.591 Vdc - 5.1 Vdc/20 A Output

Apr. 14, 2011

Bel Power Inc., a subsidiary of Bel Fuse Inc.

Absolute Maximum Ratings

Parameter

Min

Typ

Max

Unit

Notes

Input Voltage (continuous)

-0.3

-

15

V

Output Enable Terminal Voltage

-0.3

-

15

V

Ambient Temperature

0

-

70

C

Storage Temperature

-40

-

125

C

Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may

permanently damage the device.

Input Specifications

Parameter

Min

Typ

Max

Unit

Notes

Input Voltage

Vo<3.45V

Vo>=3.45V

4.5

1.3*Vo

12

12

13.8

13.8

V

V

Input Current (full load)

-

-

20

A

An input line fuse must always be

used.

Input Current (no load)

-

150

300

mA

Remote Off Input Current

-

50

-

mA

Input Reflected Ripple Current

(pk-pk)

-

50

100

mA

Input Reflected Ripple Current

(rms)

-

20

40

mA

Use a 1000uF AL-Cap on the input.

I

-

-

1

A

Turn-on Voltage Threshold

-

4.2

-

V

Turn-off Voltage Threshold

-

3.9

-

V

A 30.1K resistor is connected from

Enable to Vin.

Note: All specifications are typical at 25

C unless otherwise stated.

Output Specifications

Parameter

Min

Typ

Max

Unit

Notes

Output Voltage Set Point Accuracy

-1.5

-

1.5

%Vo,set

Vin=12V, lout=half load

Load regulation

-

-

1

%Vo,set

Line Regulation

-

-

0.5

%Vo,set

Regulation Over Temperature

(0

C to +70 C)

-

-

1

%Vo,set

Output Current

0

-

20

A

Current Limit Threshold

-

150

-

% Iomax

Output Ripple and Noise (pk-pk)

-

40

80

mV

Output Ripple and Noise (rms)

-

20

40

mV

0-20MHz BW, with a 1µF ceramic

capacitor and a 10uF Tantalum

cap at output.

Short Circuit Surge Transient

-

1

3

A