VRK81B100TH
Programmable, 100A Single Output DC/DC Converter
NOT RECOMMENDED
FOR NEW DESIGNS
SELECTION GUIDE
GUID
E
D
Order Code
r
t
Voltage
o
Input
Vo
ltage
(
NOM.)
V (NOM.)
12
t
Output
Volt
age
Voltage
V
0.8-1.55
5
O
utput
Output
C
urren
Current
A
100
Efficiency
% (TYP.)
86
VRK8
1B100TH
VRK81B100TH
8
INPUT CHARACTERISTICS
T
CHARACT
ERISTICS
T
Parameter
Input voltage operating range
Conditions
1
Turn-on threshold
Turn-off threshold
Hysteresis voltage
Typical: 100A, 1.4VID, V
IN
= 12V
Enable state, no load
Disabled state
On state range
Off state range
Active high, pullup required
MIN.
11.04
6.7
5.6
0.7
100
10
0.8
-0.3
TYP.
12.0
7.1
6.2
0.9
14
200
20
MAX.
12.6
7.5
6.8
1.1
400
50
5
0.4
5.5
Units
V
Under voltage lockout
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
Maximum input current
No-load input current
Disabled input current
Enable - positive logic
Powergood signal
A
mA
V
OUTPUT CHARACTERISTICS
Parameter
Voltage set point
Line regulation
Load regulation
Voltage total regulation DC
Voltage total regulation AC
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
VID-100mV
TYP.
0
0.5
MAX.
1.55
5
VID+50mV
VID+100mV
Units
V
mV
mΩ
V
V
mVp-p
DESCRIPTION
VRK81B100TH 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. In a
horizontal-mount orientation with a max height
of 0.415”, VRK81B100TH’s unique design and
thermal packaging delivers 100A of power with
efficiencies exceeding 86%. With its ultra low
profile and high current rating, VRK81B100TH
is an ideal fit for a wide variety of applications
including 1U high, or under, rack-mounting
equipment and blade servers.
20MHz bandwidth, using
recommended output capacitors
Based on air flow of 500LFM
at 45ºC
I
O
= 100 Amps VID = 1.550V
V
IN
present: enable to 90% V
OUT
560μF, 4V alum poly
10μF, 1206 X7R ceramic
0
83
8.4
100
86
50
8
25
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
x10
6
Hrs
KHz
1.09
300
TEMPERATURE CHARACTERISTICS
Parameter
Storage temperature range
Operating temperature
range
Conditions
1
Non-condensing
See thermal derating graph
MIN.
-40
0
TYP.
MAX.
70
60
Units
ºC
PROTECTION CHARACTERISTICS
Parameter
Output overcurrent
shutdown
Overvoltage shutdown
Conditions
1
Latching
V
OUT
MIN.
105
TYP.
MAX.
150
Units
A
V
2.2
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_VRK81B100TH.1
Page 1 of 4