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 9.0 Compatible
High efficiency means less power dissipation
Remote
on/off
2-Wire
Remote
sense
Optional 5 bit voltage programming schemes
o Intel VRM 9.x compatible 1.1V to 1.85V
o Motorola compatible 1.0V to 1.68V
Adaptive voltage positioning
Description
The V7NB-30A Series are non-isolated step down DC/DC converters providing up to 30A of output current and
designed to be compatible to the Intel VRM 9.0 / 9.1 VID codes. 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. These products are specifically design to power a wide variety of
high performance microprocessors but may be used almost anywhere low-voltage silicon is being employed and
a nominal 12V source is available. 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)
6A
Reflected Ripple Current
100mA rms
With 100uF, 25mOhm
capacitor and 200nH of input
inductance.
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Current
0A
30A
Set Point Accuracy
1.81V
1.83
1.85
no load, excluding Adaptive
positioning, VID 00000
Adaptive Positioning
(Droop Impedance)
3.33
mOhm
Ripple and Noise
20mV
pk-pk, 0 to 20MHz Bandwidth
Full load with two external
560uF oscon capacitors on
output.
Turn on Time
8mS
16mS
Transient Response
Deviation
Settling Time
90mV
175uS
di/dt = 5A/uS
Load step =50% of max load.
Cout = two 820uF OSCON
Remote Sense Compensation
0.3VDC
Output Capacitance
1200uF
20,000uF
For applications requiring
higher or lower output
capacitance please consult
factory.
V7NB-30A180 PRELIMINARY
2003 Bel Fuse Inc. Specifications subject to change without notice 022103
CORPORATE FAR
EAST
EUROPE
Bel Fuse Inc.
Bel Fuse Ltd.
Bel Fuse Europe Ltd.
206 Van Vorst Street
8F/ 8 Luk Hop Street
Preston Technology Management Centre
Jersey City, NJ 07302
San Po Kong
Marsh Lane, Suite G7, Preston
Tel 201-432-0463
Kowloon, Hong Kong
Lancashire, PR1 8UD, U.K.
Fax 201-432-9542
Tel 852-2328-5515
Tel 44-1772-556601
www.belfuse.com
Fax 852-2352-3706
Fax 44-1772-888366
www.belfuse.com
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12V Input / Programmable Output / 30A VRM 9.0 Compatible
General Specifications
Parameter
Specification
Switching Frequency
1.2 MHz typical (fixed)
Dimensions
inches
mm
3.8 x 1.0 x .35
96.5 x 25.4 x 8.9
Operating Temperature
0
C to 70C
Non-Operating Temperature
-40
C to 100C
Protection Features
Over current
Undervoltage
110% to 170% max Io
UVLO Vin < 9.5V
Remote On/Off
Active High
Efficiency (full load)
1.85V output
86%
Pin Connections
Row A
Row B
Pin
Function
Pin
Function
1 VIN+
62 VIN-
2 VIN+
61 VIN-
3 VIN+
60 VIN-
4 VIN+
59 VIN-
5 Reserved
58 VRM-pres
6 No
pin
57 VID4
7 VID3
56 VID2
8 VID1
55 VID0
9 TRIM
54 NC
10 PWRGD
53 OUTEN
11 VO-sen-
52 VO-sen+
12 UVLO_SET
51 Reserved
13 VO-
50 VO+
14 VO+
49 VO+
15 VO-
48 VO-
16 VO+
47 VO+
17 VO-
46 VO-
18 VO+
45 VO+
19 VO-
44 VO-
20 VO+
43 VO+
21 VO-
42 VO-
22 VO+
41 VO+
23 VO-
40 VO-
24 VO+
39 VO+
25 VO-
38 VO-
26 VO+
37 VO+
27 VO-
36 VO-
28 VO+
35 VO+
29 VO-
34 VO-
30 VO+
33 VO+
31 VO-
32 VO-
Voltage Identification (VID) Code
VID4
VID3
VID2
VID1
VID0
Vo (VDC)
1 1 1 1 1
Output Off
1 1 1 1 0
1.1
1 1 1 0 1
1.125
1 1 1 0 0
1.15
1 1 0 1 1
1.175
1 1 0 1 0
1.2
1 1 0 0 1
1.225
1 1 0 0 0
1.25
1 0 1 1 1
1.275
1 0 1 1 0
1.3
1 0 1 0 1
1.325
1 0 1 0 0
1.35
1 0 0 1 1
1.375
1 0 0 1 0
1.4
1 0 0 0 1
1.425
1 0 0 0 0
1.45
0 1 1 1 1
1.475
0 1 1 1 0
1.5
0 1 1 0 1
1.525
0 1 1 0 0
1.55
0 1 0 1 1
1.575
0 1 0 1 0
1.6
0 1 0 0 1
1.625
0 1 0 0 0
1.65
0 0 1 1 1
1.675
0 0 1 1 0
1.7
0 0 1 0 1
1.725
0 0 1 0 0
1.75
0 0 0 1 1
1.775
0 0 0 1 0
1.8
0 0 0 0 1
1.825
0 0 0 0 0
1.85
Part Numbers
There are two different models in this series based
on different loop compensation for various types of
capacitor banks. These models are as follows:
V7NB-30A180: Compensated for all ceramic
capacitor banks consisting of 30-40 22uF ceramic
capacitors
V7NB-30A18B: Compensated for capacitor bank
utilizing 4-6 820uF Oscon capacitors.
V7NB-30A18M: Compensated for Oscon caps but
all output voltages are divided by 1.1 yielding an
effective range of 1.0 to 1.68V compatible with the
requirements for new Motorola microprocessors.
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