RoHS Compliant
33 - 75V Input Range
High Effi ciency: 87% Typical at 5V
100mS Transient Response 50-
100% Load Step
420 kHz Fixed-Frequency
Operation
Remote Sense
Operation to +100°C Baseplate
Temperature
Primary Remote On/Off, Choice of
Pos/Neg Logic
Adjustable Output Voltage
Continuout Short-Circuit Protection
Thermal Shutdown
Case Ground Pin
The VKA100xSC Series DC/DC con-
verters present an economical and
practical solution for distributed power
system architectures which require
high power density and effi ciency while
maintaining system modularity and
upgradeability. With the ability to oper-
ate over a wide input voltage range
of 18 to 36 and 33 to 75 volts, these
modules are ideal for use in battery
backup applications common in today’s
telecommunication and electronic data
processing applications. The output is
fully isolated from the input, allowing
for a variety of polarity and grounding
confi gurations.
The VKA100xSC’s proprietary con-
trol circuitry responds to 50-100% load
steps in 100mSeconds to within 1%
nominal Vout.
The patented fi xed frequency
architecture combined with surface
mount technology results in a compact,
effi cient and reliable solution to DC/
DC conversion requirements. Safety Per
UL1950, EN 60950 and CSA 22.2 #234
PRODUCT SELECTION CHART
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04 May 2011 VKA100C.BO5 Page 1 of 4
VKA100
100 Watt Adjustable Output DC/DC Converter
www.murata-ps.com
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
MODEL INPUT VOUT IOUT EFFICIENCY
VOLTAGE (VDC) (A) MIN TYP
VKA100LS02C 2.0V 20.0 75 76
VKA100LS02FC 2.0V 30.0 73 74
VKA100LS2V5FC 2.5V 30.0 75 76
VKA100LS03C 3.3V 20.0 80 81
VKA100LS03FC 3.3V 30.0 80 81
VKA100LS05C 24VDC 5.0V 20.0 85 86
VKA100LS12C 12.0V 8.3 87 88
VKA100LS15C (18-36) 15.0V 6.7 88 89
VKA100LS24C 24.0V 4.2 89 90
VKA100MS02C 2.0V 20.0 76 77
VKA100MS02FC 2.0V 30.0 74 75
VKA100MS2V5FC 2.5V 30.0 77 78
VKA100MS03C 3.3V 20.0 81 82
VKA100MS03FC 3.3V 30.0 81 82
VKA100MS05C 48VDC 5.0V 20.0 86 87
VKA100MS12C 12.0V 8.3 88 89
VKA100MS15C (33-75) 15.0V 6.7 89 90
VKA100MS24C 24.0V 4.2 89 90
m
pliant
I
nput R
a
an
ge
c
iency:
8
8
7% Typ
i
ic
al at
5V
V
r
ansien
t
t
Response 50-
d Step
Operat
i
o
n to +
1
0
0
°
C
Ba
a
se
p
Te
e
mper
at
ur
e
Primar
y
y
Remo
te
e
On/Of
f,
,
C
h
P
os/N
eg
g
Logic
Adjust
a
ab
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p
pu
t Volt
ag
g
e
Co
nt
in
u
uo
ut
S
ho
r
rt
C
ir
cu
it
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P
TARGETED FOR
OBSOLESCENCE
TARGETED FOR OBSOLESCENCE
TARGETED FOR OBSOLESCENCE
TARGETED FOR OBSOLESCENCE
TARGETED FOR OBSOLESCENCE
TARGETED FOR OBSOLESCENCE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
OBSOLETE
SPECIFICATIONS, ALL MODELS
Specifi cations are at TCASE = +40°C nominal input voltage unless otherwise specifi ed.
INPUT
PARAMETER CONDITIONS MIN TYP MAX UNITS
INPUT
Voltage Range
VKA100LS 18 24 36 VDC
VKA100MS 33 48 75 VDC
Maximum Input Current
VKA100LS VIN = 16VDC 7.4 A
VKA100MS VIN = 27VDC 4.4 A
Refl ected Ripple Current Peak - Peak 20 mA
Input Ripple Rejection DC to 1KHz 50 60 dB
No Load Input Current LS/MS 140/80 mA
No Load Power Dissipation LS/MS 3.4/3.8 W
Standby, Primary On/Off
Disabled LS/MS 0.12/0.24 W
Inrush Charge VIN = VINmax.
VKA100LS 0.520 mC
VKA100MS 0.360 mC
Quiescent Operating Current
Primary On/Off Disabled 5 12 mA
OUTPUT
PARAMETER CONDITIONS MIN TYP MAX UNITS
Rated Power 0 100 W
Set point Accuracy 1 %
Line Regulation High Line to Low Line 0.02 0.05 %
Load Regulation No Load to Rated Load 0.2 0.5 %
Output Temperature Drift ±.02 %/°C
Output Ripple, p-p DC to 20MHz BW 1% VOUT, Nom
Output Current Limit Inception 130% 150% lOUT, Nom
Output Short-Circuit Current (2) test 120% 150% lOUT, Nom
Output Overvoltage Limit 125% 135% V
Transient Response 50 to 100% Load Step
Peak Deviation di/dt = 0.1A/μSec 2% VOUT, Nom
Settling Time VOUT, 1% of Nominal Output 100 μSec
GENERAL
PARAMETER CONDITIONS MIN TYP MAX UNITS
ISOLATION
Input to Output Peak Test for 2 Seconds 1500 VDC
Input to Baseplate 1500 VDC
Output to Baseplate 500 VDC
Resistance 10 MΩ
Capacitance 2000 pF
Leakage Current VISO = 240VAC, 60Hz 180 μA, rms
GENERAL
Effi ciency, Line, Load, Temp. (3)
Switching Frequency 400 420 440 KHz
Remote Sense Compensation 0.5 V
Output Voltage Adjust Range 12 V & higher(4) -50% / +25% VOUT, Nom
Remote On/Off Control Inputs
Primary Open Collector/Drain
Sink Current-Logic Low 1.0 mA
Vlow 0.4 V
Vhigh0 Open Collector
Turn-on Time Within 1% of Rated Output 10.0 12.5 mSec
Weight 85 (3.0) g (oz.)
TEMPERATURE
Operation/Specifi cation Case Temperature -40 +25 +100 °C
Storage Case Temperature -55 +25 +125 °C
Shutdown Temperature Case Temperature +100 +115 °C
Thermal Impedance, case-ambient 7.1 °C/W
Lead Solder Temperature 10 Seconds max +300 °C
NOTES: (1) See Typical Performance Curves, page 3
(2) Continuous Mode
(3) See graphs for Effi ciency vs. Output Load, VIN, TCASE
(4) 3.3V Models Limited in Trim Down Range
(5) Consult Factory for Details
email: sales@murata-ps.com
04 May 2011 VKA100C.BO5 Page 2 of 4
VKA100
100 Watt Adjustable Output DC/DC Converter
www.murata-ps.com
Power Dissipation (W)
Ambient Air Temperature (°C)
TYPICAL PERFORMANCE CURVES
TCASE = +40°C nominal input voltage unless otherwise specifi ed.
VKA100 xSzz -
Device Family
Indicates 100 Watt Regulated Unit
Model Number
Selected from Table of Electrical Characteristics
Where:
x = Input Voltage (L = 24VDC; M = 48VDC)
zz = Output Voltage (03=3.3V, 05=5V, etc.)
Lead Length
0.200” - No Number
0.145” - (6)
0.110” - (8)
Remote On-Off Logic:
Positive - No Number
Negative - (1)
ORDERING
INFORMATION
email: sales@murata-ps.com
04 May 2011 VKA100C.BO5 Page 3 of 4
VKA100
100 Watt Adjustable Output DC/DC Converter
www.murata-ps.com
2.28
[57.91]
MAX
1.000
[25.40]
1.400
[35.56]
2.000
[50.80]
0.19 [4.8]
0.20 [5.1]
0.50 [12.7]
0.40 [10.16]
0.530 MAX
[13.46]
0.20 [5.1] .040 [1.02] DIA.
7 PLACES
.081 [2.06] DIA.
2 PLACES
1.400
[35.56]
1.000
[25.40]
0.700
[17.78]
.400 [10.16]
1.900
[48.26]
MOUNTING INSERTS M3 X 0.5 THRU, 4 PLACES
MAX. TORQUE, 8 IN/LBS
2.40
[61.0]
MAX
MECHANICAL
NOTES:
All dimensions are in inches (millimeters).
PIN PLACEMENT TOLERANCE: ± 0.005”
MECHANICAL TOLERANCE: ± 0.015”
Marked with: specifi c modeL ordered, date code, job
code.
MATERIAL: Units are encapsulated in a low thermal
resistance molding compound which has excellent chemical
resistance and electrical properties in high humidity
environments and over a wide operating temperature
range. The encapsulant and outer shell of the unit have
UL94V-0 ratings. Lead material is solder plated to allow
ease of solderability.
This feature allows the user to accurately adjust the module’s
output voltage set point to a specifi ed level. This is achieved
by connecting a resistor or potentiometer from the TRIM
terminal to either the +Vout terminal (for increased Vout) or
the -Vout terminal (for decreased Vout). The formulae below
describe the trim resistor value to obtain a Vout change of
Δ%. VO is output voltage prior to adjustment (3.3V, 5V, 12V,
15V, or 24V).
Radj - up = ( Vo(100 + Δ%) _(100 + 2Δ%) ) kΩ
1.225Δ%Δ%
Radj - down = (100 - 2)kΩ
Δ%
OUTPUT ADJUST VOLTAGE
Special attention should be given to the peak voltage
deviation during a dynamic load step when trimming the
output above the original set point to avoid tripping the
overvoltage protection circuit. Should an OVP condition
occur, the converter will go into a latch condition and
must be externally reset before it will return to normal
operation.
OVP NOTE
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04 May 2011 VKA100C.BO5 Page 4 of 4
VKA100
100 Watt Adjustable Output DC/DC Converter
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. Specifi cations are subject to change without
notice. © 2011 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
www.murata-ps.com/locations
