VRK81B080CU Datasheet, PDF (1/4 Pages) Murata Power Solutions Inc. – Programmable, 80A Single Output DC/DC Converter

Replaced by VRK81B100CS
VRK81B080CU
Programmable, 80A Single Output DC/DC Converter
OBSOLETE PRODUCT ^{SELECTION GUIDE}
Input Voltage
Output Voltage
Order Code
Output
Current
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A
VRK81B080CU
12
0.800-1.55
80
Efficiency
% (TYP.)
85
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
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.
INPUT CHARACTERISTICS
Parameter
Conditions¹
MIN.
TYP.
MAX. Units
Input voltage operating range
10.2
12.0
13.2
Under voltage lockout
Turn-on threshold
Turn-off threshold
6.5
6.9
7.3
V
5.4
6.0
6.6
Hysteresis voltage
0.7
0.9
1.1
Maximum input current
Typical: 80A, 1.4VID, VIN = 12V
Max: 80A, 1.55VID, VIN = 12V
11
A
13
No-load input current
Disabled input current
Enable state, no load
Disabled state
100
200
400
mA
10
20
50
Enable - positive logic
On state range
Off state range
0.8
5
V
-0.3
0.4
OUTPUT CHARACTERISTICS
Parameter
Conditions¹
MIN.
TYP.
MAX. Units
Voltage set point
5-Bit DAC controlled
0.800
1.55
V
Line regulation
-5
0
5.0
mV
Load regulation
0.6
mΩ
Voltage total regulation DC
VID-50mV
VID+50mV V
Ripple & noise ²
20MHz bandwidth, using
recommended output capacitors
8.4
mVp-p
Current operating range
0
80
A
Efficiency
IO = 80A, VID = 1.4V
83
85
%
Turn-on time
Recommended bulk output
capacitance
VIN present: enable to 90% VOUT
560μF, 4V alum poly
10μF, 1206 X7R ceramic
50
mS
8
EA
25
EA
GENERAL CHARACTERISTICS
Parameter
Conditions¹
Semiconductor junction
temperature
Package rated to 150ºC
Material flammability
MTBF
Switching frequency
UL 94V-0
Calculated (RAC PRISM)
Per phase
MIN.
TYP.
MAX. Units
115
ºC
1.303
300
x10⁶ Hrs
KHz
TEMPERATURE CHARACTERISTICS
Parameter
Conditions¹
Storage temperature range Non-condensing
Operating temperature
range
See derating graph
MIN.
TYP.
MAX. Units
-40
70
ºC
0
60
www.murata-ps.com
PROTECTION CHARACTERISTICS
Parameter
Conditions¹
Output overcurrent
shutdown
Latching
Overvoltage Indication,
CBOUT
VOUT
MIN.
TYP.
MAX. Units
85
120
A
2.1
V
1. VIN = 12VDC, TA = 25ºC, Airflow = 400LFM unless otherwise noted.
2. Output ripple voltage is specified when measured with recommended capacitance at the output of the converter.
Technical enquiries - email: [e-mail], tel: [phone]
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