VRK81B080CS Datasheet, PDF (1/4 Pages) C&D Technologies – Programmable, 80A Single Output DC/DC Converter

VRK81B080CS
Programmable, 80A Single Output DC/DC Converter
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
SMBus temperature monitor
DESCRIPTION
VRK81B080CS 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. High efficiency of
85% at full load for reduced power dissipation to
simplify system thermal management. Packaged
in a compact design, VRK81B080CU is ideal for use
in a wide variety of server applications.
SELECTION GUIDE
Order Code
VRK81B080CS
Input Voltage
V (NOM.)
12
Output Voltage
V
0.8-1.55
INPUT CHARACTERISTICS
Parameter
Conditions¹
MIN.
Input voltage operating range
10.2
Turn-on threshold
6.5
Under voltage lockout
Turn-off threshold
5.4
Hysteresis voltage
0.7
Maximum input current
Typical: 80A, 1.4VID, VIN = 12V
Max: 80A, 1.55VID, VIN = 12V
No-load input current
Enable state, no load
100
Disabled input current
Disabled state
10
On state range
0.8
Enable - positive logic
Off state range
-0.3
OUTPUT CHARACTERISTICS
Parameter
Conditions¹
Voltage set point
5-Bit DAC controlled
Line regulation
Load regulation
Voltage total regulation DC
Ripple & noise ²
20MHz bandwidth, using
recommended output capacitors
Current operating range
Efficiency
IO = 80A, VID = 1.325V
Turn-on time
Recommended bulk output
capacitance
VIN present: enable to 90% VOUT
560μF, 4V alum poly
10μF, 1206 X7R ceramic
MIN.
0.800
-5
VID-50mV
0
83
GENERAL CHARACTERISTICS
Parameter
Conditions¹
MIN.
Semiconductor junction
temperature
Package rated to 150ºC
Material flammability
MTBF
Switching frequency
UL 94V-0
Calculated (RAC PRISM)
Per phase
TEMPERATURE CHARACTERISTICS
Parameter
Conditions¹
MIN.
Storage temperature range Non-condensing
-40
Operating temperature
range
See derating graph
0
Output
Current
A
80
Efficiency
% (TYP.)
85
TYP.
MAX. Units
12.0
13.2
6.9
7.3
V
6.0
6.6
0.9
1.1
11
A
13
200
400
mA
20
50
5
V
0.4
TYP.
MAX. Units
1.55
V
0
5.0
mV
0.6
mΩ
VID+50mV V
8.4
mVp-p
80
A
85
%
50
mS
8
EA
25
EA
TYP.
1.303
300
MAX.
115
Units
ºC
x10⁶ Hrs
KHz
TYP.
MAX. Units
70
ºC
60
PROTECTION CHARACTERISTICS
Parameter
Conditions¹
Output overcurrent
shutdown
Latching
Overvoltage Indication,
CBOUT
VOUT
MIN.
TYP.
MAX.
85
120
2.1
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.
Units
A
V
www.cd4power.com
ODC_VRK81B080CS.1 Page 1 of 4