Bel G7NB-81A180 Non-isolated dc/dc converters 12v input / programmable output / 81a vrm 9.1 compatible Datasheet

NON-ISOLATED DC/DC CONVERTERS
12V Input / Programmable Output / 81A VRM 9.1 Compatible
G7NB-81A180 PRELIMINARY
•
•
High efficiency means less power dissipation
Remote on/off
•
2-Wire Remote sense
•
•
5 bit VID digital voltage programming.
Single wire current sharing
Description
The G7NB-81A Series is a non-isolated step down DC/DC
converters providing up to 81A of output current and designed
to be compatible to the Intel VRM 9.1 specification. Standard features include current share, 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 may be used almost anywhere lowvoltage 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
Input Voltage Range
Input Current (disabled)
Input Current (full load)
Reflected Ripple Current
Min
10.8 VDC
Typ
Max
13.2 VDC
Notes
17mA
16A
500mA rms
With 100uF, 25mOhm
capacitor and 200nH of input
inductance.
Output Specifications
Parameter
Output Current
Set Point Accuracy
Min
0A
1.81V
Adaptive Positioning
(Droop Impedance)
Typ
1.83
Notes
no load, excluding Adaptive
positioning, VID 00000
800 uOhm
Ripple and Noise
20mV
Turn on Time
Transient Response
8mS
Deviation
Settling Time
pk-pk, 0 to 20MHz Bandwidth
Full load with two external
560uF oscon capacitors on
output.
16mS
di/dt = 5A/uS
30A Load step
100mV
175uS
Remote Sense Compensation
Output Capacitance
Max
81A
1.85
±0.3VDC
4400uF
9000uF
For applications requiring
higher or lower output
capacitance please consult
factory.
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 / 81A VRM 9.1 Compatible
General Specifications
Pin Connections
Parameter
Switching Frequency
Dimensions
Specification
1 MHz typical (fixed)
inches
mm
Row A
Pin
3.8 x 1.35 x .59
96.5 x 34.3 x 15
TBD
0°C to 70°C
-40°C to 100°C
Weight
Operating Temperature
Non-Operating Temperature
Protection Features
Over current
Undervoltage
Remote On/Off
Efficiency (full load)
1.85V output
110% to 170% max Io
UVLO Vin < 10.8V
Active High
86%
Voltage Identification (VID) Code
VID4
VID3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
VID2
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
VID1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
VID0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
Vo (VDC)
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Output Off
1.1
1.125
1.15
1.175
1.2
1.225
1.25
1.275
1.3
1.325
1.35
1.375
1.4
1.425
1.45
1.475
1.5
1.525
1.55
1.575
1.6
1.625
1.65
1.675
1.7
1.725
1.75
1.775
1.8
1.825
1.85
Function
Row B
Pin
Function
1 VIN+
62 VIN2 VIN+
61 VIN3 VIN+
60 VIN4 VIN+
59 VIN5 NC
58 VIN6 NC
57 VID4
7 VID3
56 VID2
8 VID1
55 VID0
9 Memory
54 Ishare
10 PWRGD
53 OUTEN
11 VO-sen52 VO-sen+
12 No Pin
51 No Pin
13 VO50 VO+
14 VO+
49 VO+
15 VO48 VO16 VO+
47 VO+
17 VO46 VO18 VO+
45 VO+
19 VO44 VO20 VO+
43 VO+
21 VO42 VO22 VO+
41 VO+
23 VO40 VO24 VO+
39 VO+
25 VO38 VO26 VO+
37 VO+
27 VO36 VO28 VO+
35 VO+
29 VO34 VO30 VO+
33 VO+
31 VO32 VONotes:
1. Mechanical key between pins 11 & 12 and 51 & 52
2. Pin 6 is electrical key.
2003 Bel Fuse Inc. Specifications subject to change without notice. 011202
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
Bel Fuse Ltd.
8F/ 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com
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