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

2.4 Vdc - 5.5 Vdc Input

0.75 Vdc - 3.63 Vdc/3 A Output

Input Specifications

Parameter

Min

Typ

Max

Notes

Input Voltage

2.4 V

-

5.5 V

Vo, set

Input Current (full load)

Vo=3.3 V

Vo=2.5 V

Vo=2.0 V

Vo=1.8 V

Vo=1.5 V

Vo=1.2 V

Vo=0.75 V

-

-

-

-

-

-

-

2.11 A

1.61 A

1.32 A

1.20 A

1.01 A

0.83 A

0.55 A

-

-

-

-

-

-

-

Input Current (no load)

Vo=3.3 V

Vo=0.75 V

-

-

50 mA

20 mA

-

-

Remote Off Input Current

-

2 mA

-

Input Reflected Ripple Current (pk-pk)

-

45 mA

-

Input Reflected Ripple Current (rms)

-

12 mA

-

Tested with simulated source

impedance of 1 uH, 5 Hz to 20 MHz.

I

-

-

0.04 A

Turn-on Voltage Threshold

-

2.05 V

2.4 V

Turn-off Voltage Threshold

1.7 V

2.0 V

-

Output Specifications

Parameter

Min

Typ

Max

Notes

Output Voltage Set Point

-2% Vo,set

-

2% Vo,set

Vin=5 V, 50%lo max

Output Voltage Set Point

-3% Vo,set

-

3% Vo,set

Over all operating input voltage,

resistive load and temperature

conditions until end of life.

Adjustment Range Selected by

External Resistor or Voltage

0.7525 V

-

3.63 V

Load Regulation

-

0.2% Vo,set

-

Io=Iomin to 50% Iomax

Line Regulation

-

0.2% Vo,set

-

Vin=Vinmin to Vinmax

Regulation Over Temperature

(-40

°C to +85 °C)

-

0.4% Vo,set

-

Tref=Tamin to Tamax

Output Current

0 A

-

3 A

Current Limit Threshold

4 A

-

9.5 A

Short Circuit Surge Transient

-

0.32 A

-

Ripple and Noise (pk-pk)

-

30 mV

50 mV

Ripple and Noise (rms)

-

10 mV

15 mV

Tested with 0-20 MHz, with

10 uF tantalum capacitor & 1 uF

/10 V ceramic capacitor at the

output

Turn on Time

-

10 mS

14 mS

Overshoot at Turn on

-

-

1%

Output Capacitance

ESR

≥ 1 mohm

ESR

≥ 10 mohm

0 uF

0 uF

-

-

1000 uF

3000 uF

Transient Response

50% ~ 100% Max Load

-

150 mV

-

Settling Time

-

40 uS

-

100% ~ 50% Max Load

-

150 mV

-

Settling Time

3.63 V

-

40 uS

-

di/dt=2.5 A/uS; Vin=5 V; and

with 10 uF tantalum capacitor &

1 uF/10 V TDK ceramic

capacitor at the output

Note