
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
12V Input / Programmable Output / 30A VRM
High efficiency means less power dissipation
Remote on/off
2-Wire Remote sense
5 bit voltage programming scheme
Adaptive voltage positioning (Load Line)
Description
The V7NB-30A07A is a non-isolated step down DC/DC converter capable of supplying up to 30A of average
output current with output voltage selection via a 5-bit VID code. Standard features include remote on/off, over
current protection, remote sense and a power good signal. This product also makes use of adaptive positioning
to improve transient response performance. This model number can support multiple VID schemes by
terminating Pin 9 with specific resistor and reference combinations. Typical applications include file servers,
work stations and other computing applications.
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage Range
10.8 VDC
13.2 VDC
Input Current (disabled)
30mA
Input Current (full load)
8A
Reflected Ripple Current
150mA rms
With 100uF, 25mOhm
capacitor and 200nH of input
inductance.
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Current
0A
30A
Set Point Accuracy
1.62V
1.65
1.68V
no load, excluding adaptive
positioning, VID 01000 (08h),
pin 9 terminated to ground
through a 4.77K resistor.
Load Line Impedance
1.65 mOhm
50mV droop from 0 to 30A
Ripple and Noise
25mV
pk-pk, 0 to 20MHz Bandwidth
Full load with external 6 x
470uF 7mOhm Polymer
capacitors and 6 x 10uF X5R
ceramic capacitors.
Turn on Time
8mS
16mS
Transient Response
Deviation
Settling Time
50mV
175uS
di/dt = 2.5A/uS
Load step =50% of max load.
External Cout as specified for
ripple and noise.
Includes Load Line
Remote Sense Compensation
±0.3VDC
Output Capacitance
800uF
5,000uF
For applications requiring
higher or lower output
capacitance please consult
factory.
Note 1: Feedback compensation optimized for external 6 x 470uF, 7mOhm, polymer capacitors and 6 x 10uF X5R ceramic
capacitors.
VRNB-30A07A PRELIMINARY