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

5.0V Input

0.9V to 3.3V/12A Output

•

Non-Isolated

•

Remote On/Off

•

Fixed frequency (300kHz)

•

Input Under-voltage Lockout (UVLO)

•

Low profile package (8.5mm)

•

OCP/SCP

•

Remote Sense

•

Wide Trim Range/output

Description

The S7DB-12B1Ax is part of the low cost non-isolated DC/DC power converter series. The module uses a DIP

package for ease of layout and space savings, with a low profile of 8.5mm. The output is widely trimmed from

0.9V to 3.3V, and the efficiency of 3.3V output module is typically 92% at full load. Features include remote

sense, remote on/off, short circuit protection, over current protection and input under-voltage lockout.

Part Selection

Output

Voltage

Input

Voltage

Max. Output

Current

Max. Output

Power

Typical

Efficiency

Model Number

Active High

Model Number

Active Low

0.9 – 3.3V

5V

12A

39.6W

92%

S7DB-12B1AH

S7DB-12B1A0

Note:

Add “R” suffix at the end of the model number to indicate “Reel Packaging”, and “G” for “Tray

Packaging”.

Absolute Maximum Ratings

Parameter

Min

Typ

Max

Notes

Input Voltage (continuous)

-0.3V

-

6V

Output Enable Terminal Voltage

-0.3V

-

6V

Ambient Temperature

-40

°C

-

85

°C

Storage Temperature

-55

°C

-

100

°C

Input Specifications

Parameter

Min

Typ

Max

Notes

Input Voltage

4.5V

5.0V

5.5V

Input Current (full load)

Vo=3.3V

Vo=2.5V

Vo=1.8V

Vo=1.5V

Vo=1.2V

Vo=1.0V

Vo=0.9V

-

-

-

-

-

-

-

-

-

-

-

-

-

-

11.2A

8.7A

6.6A

5.5A

4.5A

3.5A

3.2A

Input Current (no load)

-

70mA

100mA

Remote Off Input Current

10mA

20mA

Input Reflected Ripple Current

(pk-pk)

-

140mA

280mA

Input Reflected Ripple Current

(RMS)

-

40mA

80mA

Tested with simulated source

impedance of 500Hz to 20MHz &

two 270uF/10V Oscon capacitors

with ESR=0.018 ohm max. at

100KHz

I

-

0.1A

0.2A

Turn-on Voltage Threshold

-

4.3V

4.5V

Turn-off Voltage Threshold

-

3.85V

4.49V

Note:

S7DB-12B1Ax