ers for embedded applications. The tiny form factor
is configured on a Land Grid Array (LGA) assembly
measuring only 0.8 x 0.45 x0.34 inches (20.32 x
11.43 x 8.55 mm). Applications include powering
CPU’s, datacom/telecom systems, distributed bus
architectures (DBA), programmable logic and mixed
voltage systems.
The wide input range is 2.4 to 5.5Volts DC.
The maximum output current is 12Amps. Based
on fixed-frequency synchronous buck converter
switching topology, the high power conversion
efficient Point of Load (PoL) module features pro-
grammable output voltage and On/Off control.
These converters also include under voltage lock
out (UVLO), output short circuit protection, over-
current and over temperature protections.
Connection Diagram
+Vin
F1
+Vout
On/Off
Control
Controller
External
DC
Power
Source
Trim
Open = On
Closed = Off
(Positive
On/Off)
Common
Power Good
Reference and
Error Amplifier
Common
Figure 1. OKL2-T/12-W5
Note: Murata Power Solutions strongly recommends an external input fuse, F1.
See specifications.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_OKL2-T/12-W5.B02
Page 1 of 17
OKL2-T/12-W5 Series
Programmable Output 12-Amp
iLGA
SMT PoL
DC-DC Converter Series
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
R/N Regulation (max.)
Vout Iout (Amps, Power
Vin nom.
(mV p-p)
(Volts)
➀
max.)
➁
(Watts)
(Volts)
Load
Max.
➃
Line
0.6-3.63
12
39.6
30
±0.6% ±0.25%
5
Efficiency (%)
Min.
Typ.
Seq/ Track
Output
Model Number
OKL-T/12-W5P-C
OKL-T/12-W5N-C
OKL2-T/12-W5P-C
OKL2-T/12-W5N-C
➀
➁
Input
Range Iin, no load Iin, full load
(Volts)
➃
(mA)
➃
(Amps)
➁
On/Off Logic
Dimensions
Inches (mm)
Pos. no
2.4-5.5
30
8.43
91.5
94.0
Neg. no
0.8 x 0.45 x 0.34
(20.32 x 11.43 x 8.55)
Pos. yes
Neg. yes
The output range is limited by Vin. See detailed specs.
All specifications are at nominal line voltage, Vout=nominal (3.3V) and full
load, +25°C. unless otherwise noted.
Output capacitors are 94 μF ceramic. Input cap is 22 μF. See detailed
specifications. I/O caps are necessary for our test equipment and may not
be needed for your application.
➂
Use adequate ground plane and copper thickness adjacent to the converter.
Ripple and Noise (R/N) and no-load input current are shown at Vout=1V.
See specs for details.
PART NUMBER STRUCTURE
OK L 2
-
T
/
12
-
W5 N
-
C
Okami Non-isolated PoL
LGA Surface Mount
Sequence/tracking
Blank = Not Installed
2 = installed
Trimmable Output
Voltage Range
0.6 - 3.63Vdc
RoHS Hazardous
Substance Compliance
C = RoHS-6 (does not claim EU RoHS exemption
7b – lead in solder)
On/Off Logic
P = Positive Logic
N = Negative Logic
Input Voltage Range
2.4 - 5.5Vdc
Maximum Rated Output
Current in Amps
Product Label
Because of the small size of these products, the product label contains a
character-reduced code to indicate the model number and manufacturing date
code. Not all items on the label are always used. Please note that the label
differs from the product photograph. Here is the layout of the label:
Model Number
OKL-T/12-W5P-C
OKL-T/12-W5N-C
OKL2-T/12-W5P-C
OKL2-T/12-W5N-C
Product Code
L01012
L00012
L21012
L20012
The manufacturing date code is four characters:
Mfg.
date
code
XXXXXX
YMDX Rev.
Product code
Revision level
Figure 2.
Label Artwork Layout
The label contains two rows of information:
First row – Model number product code (see table)
Second row – Manufacturing date code and revision level
First character – Last digit of manufacturing year, example 2009
Second character – Month code (1 through 9 = Jan-Sep;
O, N, D = Oct, Nov, Dec)
Third character – Day code (1 through 9 = 1 to 9, 10 = 0 and
11 through 31 = A through Z)
Fourth character – Manufacturing information
www.murata-ps.com/support
MDC_OKL2-T/12-W5.B02
Page 2 of 17
OKL2-T/12-W5 Series
Programmable Output 12-Amp
iLGA
SMT PoL
DC-DC Converter Series
FUNCTIONAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Output Power
Output Current
Conditions (1)
Full power operation
Current-limited, no damage,
short-circuit protected
Minimum
0
0
0
Typical/Nominal
Maximum
6
43.56
12
Units
Vdc
W
A
On/Off Control
5.5
Vdc
Storage Temperature Range
Vin = Zero (no power)
-55
125
˚C
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other
than those listed in the Performance/Functional Specifications Table is not implied or recommended.
INPUT
Operating voltage range (7)
See output voltage vs input voltage
2.4
5
5.5
Vdc
Recommended External Fuse
Fast blow
28
A
Turn On/Start-up threshold
Rising input voltage
1.95
2.05
2.15
Vdc
Undervoltage Shutdown
1.8
1.92
2.07
Internal Filter Type
C-TYPE
Input current
Full Load Conditions
Vin = nominal (3.3Vo set)
8.43
8.69
A
Low Line
Vin @ min, 3.3 Vout
9.33
9.71
A
Inrush Transient
TBD
A
2
-Sec.
Short Circuit Input Current
TBD
mA
No Load Input Current
3.3Vout, Iout @ 0
45
60
mA
No Load Input Current
1.2V, Iout @ 0
35
50
Shut-Down Mode Input Current
1
mA
Reflected (back) ripple current (2)
Measured at input with specified filter
TBD
mA, pk-pk
GENERAL and SAFETY
@ Vin nom, 3.63Vout
92.5
94.7
@ Vin nom, 3.3Vout
91.5
94
@ Vin min=4.5Vin, 3.3Vout
92
94.3
EFFICIENCY (12Vin @ 12A load current)
%
@ Vin nom, 2.5Vout
88.5
91.6
@Vin nom, 1.8Vout
84.5
89
@Vin nom, 1.2Vout
81.5
85.4
Certified to UL-60950-1, CSA-C22.2
Safety
No.60950-1, IEC/60950-1, 2nd edition
Yes
(pending)
Per Telcordia SR332, issue 1 class 3, ground
Calculated MTBF (4a)
10,488,000
Hours
fixed, Tambient=+25˚C
Calculated MTBF (4b)
Per Mil-HDBK-217N2 Method
6,071,542
Hours
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
600
KHz
Startup Time
Power On to Vout regulated
6
mS
Startup Time
Remote ON to to Vout regulated
6
mS
50-100-50% load step, settling time to within
Dynamic Load Response
50
μSec
±2% of Vout di/dt =1 A/μSec
Dynamic Load Peak Deviation
same as above
±300
mV
FEATURES and OPTIONS
Remote On/Off Control (5)
“N” suffix
Negative Logic, ON state
Pin open=ON
-0.2
Vin-1.7
V
Negative Logic, OFF state
Vin-0.7
+Vin-max
V
Control Current
open collector/drain
3
mA
“P” suffix
Positive Logic, ON state
Pin open=ON
+Vin-0.7V
Vin-max
V
Positive Logic, OFF state
-0.3
0.8
V
Control Current
open collector/drain
3
mA
Tracking/Sequencing(optional)
Slew Rate
2
V/mS
Tracking Accuracy
Rising input (0.5V/ms)
±150
mV
Tracking Accuracy
Falling input(0.5V/ms)
±100
mV
Power Good Option
PGOOD, Open Drain Configuration, Sinking:
Vout window for PGOOD: True
-10%
10%
Vset
Vout window for PGOOD: False
0.05
Vdc
Remote Sense
500
mV
www.murata-ps.com/support
MDC_OKL2-T/12-W5.B02
Page 3 of 17
OKL2-T/12-W5 Series
Programmable Output 12-Amp
iLGA
SMT PoL
DC-DC Converter Series
FUNCTIONAL SPECIFICATIONS (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage Range (13)
Setting Accuracy
Output Voltage Overshoot-Startup
Current
Output Current Range
Minimum Load
Current Limit Inception (6)
Short Circuit
Short Circuit Current (17)
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Regulation (10)
Total Regulation Band
Line Regulation
Load Regulation
Ripple and Noise (8)
Temperature Coefficient
Maximum Capacitive Loading (14)
MECHANICAL
Outline Dimensions
Weight
ENVIRONMENTAL
Operating Ambient Temperature Range (9)
Storage Temperature
Thermal Protection/Shutdown
RoHS rating
full power, all output voltages, see derating
curves
Vin = Zero (no power)
Measured in center
-40
-55
TBD
RoHS-6
85
125
˚C
˚C
˚C
0
See trim formula
At 50% load
0.6
-1.5
39.6
43.56
3.63
1.5
3
12
No minimum load
22
0.02
Continuous
12
W
Vdc
% of Vnom.
% Vo set
A
A
A
0
98% of Vnom., after warmup
Hiccup technique, autorecovery within ±1%
of Vout
Output shorted to ground, no damage
Current limiting
-2.5
Vin=min. to max. Vout=nom.
Iout=min. to max.
3.3Vo, 12Vin
2.5Vo, 12Vin
1.8Vo, 12Vin
0.69Vo, 7Vin
At all outputs
Low ESR; >0.001, <0.01 ohm
ESR > 0.01 ohm
12.2
Vo set
30
30
30
15
±0.02
94
2.5
±0.6
±0.25
100
100
100
100
1000
5000
% Vo set
%
%
mV pk-pk
% of Vnom./°C
μF
μF
Inches
mm
Ounces
Grams
0.8 x 0.45 x 0.34
20.32 x 11.43 x 8.55
0.1
2.78
Notes
(1)
Specifications are typical at +25°C, Vin = nominal (+5V), Vout = nominal (+3.3V), full load, external caps and
natural convection unless otherwise indicated. Extended tests at full power must supply substantial forced
airflow. All models are tested and specified with external 2×47μF ceramic output capacitors and a 22 μF external
input capacitor. All capacitors are low ESR types. These capacitors are necessary to accommodate our test
equipment and may not be required to achieve specified performance in your applications. However, Murata
Power Solutions recommends installation of these capacitors. All models are stable and regulate within spec
under no-load conditions.
(2)
Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering is Cin = 2 x
