Replaced by VRK81B100CS
VRK81B080CU
Programmable, 80A Single Output DC/DC Converter
OBSOLETE PRODUCT
Order Code
C
ode
Input
Voltage
(NOM
.)
M
V (NOM.)
V
Contact Factory for Replacement Model
VRK81B
080CU
VRK81B080CU
B
12
0.800-1.55
SELEC
TION
SELECTION GUIDE
C
E
g
Output
Voltag
e
Voltage
Output
Current
A
80
Efficiency
% (TYP.)
85
INPUT CHARACTERISTICS
CHARACTE
RISTICS
E
Parameter
Input voltage operating range
Conditions
1
Turn-on threshold
Turn-off threshold
Hysteresis voltage
Typical: 80A, 1.4VID, V
IN
= 12V
Max: 80A, 1.55VID, V
IN
= 12V
Enable state, no load
Disabled state
On state range
Off state range
MIN.
10.2
6.5
5.4
0.7
TYP.
12.0
6.9
6.0
0.9
11
200
20
MAX.
13.2
7.3
6.6
1.1
13
400
50
5
0.4
Units
V
FEATURES
Meets AMD K8 requirements
DAC Programmable output voltage
Power good output
Differential remote sense
Remote enable
Supervisory functions
Latch off overcurrent
Short circuit protection
Tri-state output when disabled
Dynamic VID capability
1U Form factor (1.200” total mating height)
SMBus temperature monitor
Under voltage lockout
Maximum input current
No-load input current
Disabled input current
Enable - positive logic
A
mA
V
100
10
0.8
-0.3
OUTPUT CHARACTERISTICS
Parameter
Voltage set point
Line regulation
Load regulation
Voltage total regulation DC
Ripple & noise
2
Current operating range
Efficiency
Turn-on time
Recommended bulk output
capacitance
Conditions
1
5-Bit DAC controlled
MIN.
0.800
-5
VID-50mV
TYP.
0
0.6
MAX.
1.55
5.0
VID+50mV
Units
V
mV
mΩ
V
mVp-p
20MHz bandwidth, using
recommended output capacitors
I
O
= 80A, VID = 1.4V
V
IN
present: enable to 90% V
OUT
560μF, 4V alum poly
10μF, 1206 X7R ceramic
0
83
8.4
80
85
50
8
25
DESCRIPTION
VRK81B080CU is designed to meet the fast load
transients required by AMD 64-bit processors
and is fully compliant with the latest AMD64™
processor power specifications. Packaged in a
compact design, VRK81B080CU has a height only
1.16” (1.2” total mating height), and is ideal for
1U server applications. High efficiency of 85% at
full load for reduced power dissipation to simplify
system thermal management.
A
%
mS
EA
EA
GENERAL CHARACTERISTICS
Parameter
Semiconductor junction
temperature
Material flammability
MTBF
Switching frequency
Conditions
1
Package rated to 150ºC
UL 94V-0
Calculated (RAC PRISM)
Per phase
MIN.
TYP.
MAX.
115
Units
ºC
1.303
300
x10
6
Hrs
KHz
TEMPERATURE CHARACTERISTICS
Parameter
Storage temperature range
Operating temperature
range
Conditions
1
Non-condensing
See derating graph
MIN.
-40
0
TYP.
MAX.
70
60
Units
ºC
PROTECTION CHARACTERISTICS
Parameter
Output overcurrent
shutdown
Overvoltage Indication,
CBOUT
Conditions
1
Latching
V
OUT
MIN.
85
TYP.
MAX.
120
Units
A
V
2.1
1. V
IN
= 12VDC, T
A
= 25ºC, Airflow = 400LFM unless otherwise noted.
2. Output ripple voltage is specified when measured with recommended capacitance at the output of the converter
.
www.murata-ps.com
Technical enquiries
-
email:
sales@murata-ps.com,
tel:
+1 508 339 3000
ODC_VRK81B080CU.1
Page 1 of 4
VRK81B080CU
Programmable, 80A Single Output DC/DC Converter
PACKAGE SPECIFICATIONS (continued)
MECHANICAL DIMENSIONS
Recommended Interface Connector Options
Typco/Elcon
283-0172-01303 (Solder Tail, Long)
283-0172-02303 (Solder Tail, Short)
284-0202-03003 (Surface Mount)
All dimensions in inches ±0.03 (mm ±0.25mm).
Weight: 2.08oz (59g)
USA:
Canada:
UK:
France:
Germany:
Japan:
China:
Singapore:
Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com
Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com
Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com
Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com
München, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com
Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com
Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com
Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com
Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com
Technical enquiries
-
email:
sales@murata-ps.com,
tel:
+1 508 339 3000
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 and 14001 REGISTERED
01/19/09
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2008 Murata Power Solutions, Inc.
www.murata-ps.com
ODC_VRK81B080CU.1
Page 4 of 4
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