Fiche technique pour OKL(2)-T/12-W12 Series de Murata Power Solutions Inc.

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Figure 1. OKL2-T/12-W12
Note: Murata Power Solutions strongly recommends an external input fuse, F1.
See specifi cations.
The OKL2-T/12-W12 series are miniature non-
isolated Point-of-Load (PoL) DC-DC power convert-
ers for embedded applications. The tiny form factor
is confi gured on a Land Grid Array (LGA) assembly
measuring only 0.8 x 0.45 x 0.34 inches (20.32 x
11.43 x 8.55 mm). Applications include power-
ing CPUs, datacom/telecom systems, distributed
bus architectures (DBA), programmable logic, and
mixed voltage systems. The wide input range is 4.5
to 14 Volts DC.
The maximum output current is 12 Amps. Based
on fi xed-frequency synchronous buck converter
switching topology, the high power conversion
effi cient PoL module features programmable output
voltage and On/Off control. These converters also
include under voltage lock out (UVLO), output
short circuit protection, and over-current and over
temperature protections.
PRODUCT OVERVIEW
Connection Diagram
External
DC
Power
Source
F1 On/Off
Control
Common
Common
Open = On
Closed = Off
+Vin +Vout
Trim
Controller
Reference and
Error Amplifier
t4XJUDIJOH
t'JMUFST
t$VSSFOU4FOTF
(Positive
On/Off)
Sync
4FRVFODF5SBDLJOH Power Good
FEATURES
iLGA inspectable Land Grid Array
4.5-14Vdc input voltage range
Programmable output voltage from 0.69-5.5Vdc
Drives 1000µF ceramic capacitive loads
High power conversion effi ciency at 95%
Outstanding thermal derating performance
Over temperature and over current protection
On/Off control and Power Good output
RoHS-6 hazardous substance compliance
Tracking operation/Synchronized function
Typical unit
T
ypical unit
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 1 of 19
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For full details go to
www.murata-ps.com/rohs
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Model Number
Output Input Effi ciency (%) On/
Off
Logic
Dimensions
Vout
(Volts) ➀
Iout (Amps,
max.) ➁
Power
(Watts)
R/N
(mV p-p)
Max. ➃
Regulation (max.) Vin nom.
(Volts)
Range
(Volts) ➃
Iin, no load
(mA) ➃
Iin, full load
(Amps) ➁Inches (mm)
Line Load Min. Typ.
OKL2-T/12-W12P2-C 0.69-5.5 12 60 20 ±0.4% ±0.4% 12 4.5-14 30 5.26 91.5 95.0 Pos. 0.8 x 0.45 x 0.34
(20.32 x 11.43 x 8.55)
OKL2-T/12-W12N2-C Neg.
PART NUMBER STRUCTURE
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 2 of 19
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Maximum Rated Output
Current in Amps
Input Voltage Range
4.5-14Vdc
/W12-
Trimmable Output
Voltage Range
0.69-5.5Vdc
-T
LGA Surface Mount, MSL Rating 2
L
Sequence/tracking
Blank = Not Installed
2 = installed
2 12
Okami Non-isolated PoL
OK C-
RoHS Hazardous
Substance Compliance
C = RoHS-6 (does not claim EU RoHS exemption
7b – lead in solder)
On/Off Logic
P2 = Positive Logic
N2 = Negative Logic
N2
➀ The output range is limited by Vin. See detailed specs.
➁All specifi cations are at nominal line voltage, Vout=nominal (5V) and full
load, +25°C. unless otherwise noted.
Output capacitors are 188 µF ceramic. Input cap is 44 µF. See detailed
specifi cations. 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=1.8V.
See specs for details.
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:
The label contains two rows of information:
First row – Model number product code (see table)
Second row – Manufacturing date code and revision level
The manufacturing date code is four characters:
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
Figure 2. Label Artwork Layout
XXXXXX Product code
Mfg.
date
code
Revision levelYMDX Rev.
Model Number Product Code
OKL2-T/12-W12P2-C L21112
OKL2-T/12-W12N2-C L20112
Mm“. My salmon; Warm
FUNCTIONAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS Conditions (1) Minimum Typical/Nominal Maximum Units
Input Voltage, Continuous Full power operation 0 15 Vdc
Output Power 066W
Output Current Current-limited, no damage,
short-circuit protected 012A
On/Off Control 14 Vdc
Power Good Pin 6 Vdc
Synchronized Pin 12 Vdc
Sequence Pin Vin max 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 Specifi cations Table is not implied or recommended.
INPUT
Operating voltage range (7) See output voltage vs input voltage 4.5 12 14 Vdc
Recommended External Fuse Fast blow 28 A
Turn On/Start-up threshold Rising input voltage 3.9 4.2 4.5 Vdc
Undervoltage Shutdown 3.7 4 4.3
Internal Filter Type C-TYPE
Input current
Full Load Conditions Vin = nominal (5Vo set) 5.26 5.55 A
Low Line Vin @ min, 5 Vout 8.98 9.51 A
Inrush Transient TBD A2-Sec.
Short Circuit Input Current TBD mA
No Load Input Current 5Vout, Iout @ 0 70 140 mA
No Load Input Current 1V, Iout @ 0 30 60
Shut-Down Mode Input Current 1mA
Refl ected (back) ripple current (2) Measured at input with specifi ed fi lter TBD mA, pk-pk
GENERAL and SAFETY
EFFICIENCY (12Vin @ 12A load current)
@ Vin nom, 5Vout 91.5 95
%
@ Vin min=8Vin, 5Vout 91.5 95.5
@ Vin nom, 3.3Vout 88.5 92.5
@ Vin nom, 2.5Vout 85.5 90
@Vin nom, 1.8Vout 82.5 88
Safety
Certifi ed to UL-60950-1, CSA-C22.2
No.60950-1, IEC/60950-1, 2nd edition
(pending)
Yes
Calculated MTBF (4a) Per Telcordia SR332, issue 1 class 3, ground
fi xed, Tambient=+25˚C 7,655,324 Hours
Calculated MTBF (4b) Per Mil-HDBK-217N2 Method 4,659,094 Hours
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency 400 KHz
Synchronization frequency range 420 600 KHz
High level input voltage 3 12 Vdc
Low level input voltage 0 0.8 Vdc
Input currrent SYNC pin VSYNC = 3.0V 1 mA
Minimun pulse width, SYNC 250 nS
Minimum pulse set-up/hold time SYNC pin (note 15) 250 nS
Startup Time Power On to Vout regulated 6 mS
Startup Time Remote ON to to Vout regulated 6 mS
Dynamic Load Response 50-100-50% load step, settling time to within
±2% of Vout di/dt =1 A/µSec 200 µSec
Dynamic Load Peak Deviation same as above ±250 mV
FEATURES and OPTIONS
Remote On/Off Control (5)
“N” suffi x
Negative Logic, ON state Pin open=ON 0 0.7 V
Negative Logic, OFF state 2 +Vin-max V
Control Current open collector/drain 3 mA
“P” suffi x
Positive Logic, ON state Pin open=ON +Vin-0.8V Vin-max V
Positive Logic, OFF state 0 2.5 V
Control Current open collector/drain 3 mA
Remote Sense 500 mV
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 3 of 19
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FEATURES and OPTIONS, CONT. Conditions (1) Minimum Typical/Nominal Maximum Units
Tracking/Sequencing(optional)
Slew Rate 2 V/mS
Tracking Accuracy Rising input (0.5V/ms) ±100 mV
Tracking Accuracy Falling input (0.5V/ms) ±350 mV
Power Good Option
PGOOD, Open Drain Confi guration, Sinking:
Vout window for PGOOD: True -10% 10% Vset
Vout window for PGOOD: False 0.05 Vset
OUTPUT
Total Output Power 06
066W
Voltage
Nominal Output Voltage Range (13) See trim formula 0.69 5.5 Vdc
Setting Accuracy At 50% load -1.5 1.5 % of Vnom.
Output Voltage Overshoot-Startup 3 % Vo set
Current
Output Current Range 01212A
Minimum Load No minimum load
Current Limit Inception (6) 98% of Vnom., after warmup 12.2 22 A
Short Circuit
Short Circuit Current (17) Hiccup technique, autorecovery within ±1%
of Vout 0.02 A
Short Circuit Duration (remove short for
recovery) Output shorted to ground, no damage Continuous
Short circuit protection method Current limiting
Regulation (10)
Total Regulation Band -2.5 Vo set 2.5 % Vo set
Line Regulation Vin=min. to max. Vout=nom. ±0.4 %
Load Regulation Iout=min. to max. ±0.4 %
Ripple and Noise (8)
5Vo, 12Vin 45 100
mV pk-pk
3.3Vo, 12Vin 25 60
1.8Vo, 12Vin 20 50
0.69Vo, 7Vin 15 40
Temperature Coeffi cient At all outputs ±0.02 % of Vnom./°C
Maximum Capacitive Loading (14) Low ESR; >0.001, <0.01 ohm 188 1000 F
ESR > 0.01 ohm 5000 F
MECHANICAL
Outline Dimensions 0.8 x 0.45 x 0.34 Inches
20.32 x 11.43 x 8.55 mm
Weight 0.1 Ounces
2.78 Grams
ENVIRONMENTAL
Operating Ambient Temperature Range (9) full power, all output voltages, see derating
curves -40 85 ˚C
Storage Temperature Vin = Zero (no power) -55 125 ˚C
Thermal Protection/Shutdown Measured in center TBD ˚C
RoHS rating RoHS-6
FUNCTIONAL SPECIFICATIONS (CONT.)
Notes
(1) Specifi cations are typical at +25 °C, Vin = nominal (+12V), Vout = nominal (+5V), full load, external caps and
natural convection unless otherwise indicated. Extended tests at full power must supply substantial forced
airfl ow. All models are tested and specifi ed with external 4×47F ceramic output capacitors and a 22 F 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 specifi ed 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 specifi ed over a 5 Hz to 20 MHz bandwidth. Input fi ltering is Cin = 2 x
100 F ceramic, Cbus = 1000 F electrolytic, Lbus = 1 H.
(3) Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher
temperatures and/or lower airfl ow, the DC-DC converter will tolerate brief full current outputs if the total RMS
current over time does not exceed the Derating curve.
(4a) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fi xed
conditions, Tpcboard = +25 ˚C, full output load, natural air convection.
(4b) Mean Time Before Failure is calculated using the MIL-HDBK-217N2 method, ground benign, +25oC., full output
load, natural convection.
(5) The On/Off Control Input should use either a switch or an open collector/open drain transistor referenced to
-Input Common. A logic gate may also be used by applying appropriate external voltages which do not exceed
+Vin.
(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting.
(7) Please observe the voltage input and output specifi cations in the voltage range graph.
(8) Output noise may be further reduced by adding an external fi lter. At zero output current, the output may contain
low frequency components which exceed the ripple specifi cation. The output may be operated indefi nitely with
no load.
(9) All models are fully operational and meet published specifi cations, including “cold start” at –40˚ C.
(10) Regulation specifi cations describe the deviation as the line input voltage or output load current is varied from a
nominal midpoint value to either extreme.
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 4 of 19
www.murata-ps.com/support
Murofo Power Solutions flDkami
Notes, cont.
(11) Other input or output voltage ranges will be reviewed under scheduled quantity special order.
(12) Maximum PC board temperature is measured with the sensor in the center of the converter.
(13) Do not exceed maximum power specifi cations when adjusting the output trim.
(14) The maximum output capacitive loads depend on the the Equivalent Series Resistance (ESR) of the external
output capacitor and, to a lesser extent, the distance and series impedance to the load. Larger caps will reduce
output noise but may change the transient response. Newer ceramic caps with very low ESR may require lower
capacitor values to avoid instability. Thoroughly test your capacitors in the application. Please refer to the Output
Capacitive Load Technical Note.
(15) Do not allow the input voltage to degrade lower than the input undervoltage shutdown voltage at all times.
Otherwise, you risk having the converter turn off. The undervoltage shutdown is not latching and will attempt to
recover when the input is brought back into normal operating range.
(16) The outputs are not intended to sink appreciable reverse current.
(17) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. If the
overcurrent condition still exists, the restart current will be removed and then tried again. This short current pulse
prevents overheating and damaging the converter. Once the fault is removed, the converter immediately recovers
normal operation.
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 5 of 19
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OKL2-T/12-W12 PERFORMANCE DATA AND OSCILLOGRAMS
Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=5.0V)
0
2
4
6
8
10
12
14
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Output Current (Amps)
Ambient Temperature
(°C)
0.2 m/s (40 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
Step Load Transient Response (Vin=12V, Vout=5.0V, Cload=188µF, Iout=6A to 12A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Step Load Transient Response (Vin=12V, Vout=5.0V, Cload=188µF, Iout=12A to 6A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Effi ciency vs. Line Voltage and Load Current @Ta = +25 °C (Vout = 5V)
75
80
85
90
100
95
024681012
Load Current (Amps)
Efficiency (%)
VIN = 8V
VIN = 12V
VIN = 14V
Output Ripple and Noise (Vin=12V, Vout=5.0V, Iout=12A, Cload=188uF,
ScopeBW=20MHz) Trace2=Vout,10mV/div(AC)
On/Off Enable Delay (Vin=12V, Vout=5.0V, Iout=12A, Cload=188uF) Trace1=Enable,
5V/div Trace2=Vout,2V/div
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 6 of 19
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OKL2-T/12-W12 PERFORMANCE DATA AND OSCILLOGRAMS
Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=3.3V)
0
2
4
6
8
10
12
14
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Output Current (Amps)
Ambient Temperature
(°C)
0.2 m/s (40 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
Step Load Transient Response (Vin=12V, Vout=3.3V, Cload=188µF, Iout=6A to 12A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Step Load Transient Response (Vin=12V, Vout=3.3V, Cload=188µF, Iout=12A to 6A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Effi ciency vs. Line Voltage and Load Current @Ta = +25 °C (Vout = 3.3V)
75
80
85
90
100
95
024681012
Load Current (Amps)
Efficiency (%)
VIN = 4.5V
VIN = 12V
VIN = 14V
Output Ripple and Noise (Vin=12V, Vout=3.3V, Iout=12A, Cload=188µF,
ScopeBW=20MHz) Trace2=Vout,10mV/div(AC)
On/Off Enable Delay (Vin=12V, Vout=3.3V, Iout=12A, Cload=188µF) Trace1=Enable,
5V/div Trace2=Vout,1V/div
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 7 of 19
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OKL2-T/12-W12 PERFORMANCE DATA AND OSCILLOGRAMS
Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=2.5V)
0
2
4
6
8
10
12
14
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Output Current (Amps)
Ambient Temperature
(°C)
0.2 m/s (40 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
Step Load Transient Response (Vin=12V, Vout=2.5V, Cload=188µF, Iout=6A to 12A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Step Load Transient Response (Vin=12V, Vout=2.5V, Cload=188µF, Iout=12A to 6A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Effi ciency vs. Line Voltage and Load Current @Ta = +25 °C (Vout = 2.5V)
75
80
85
90
100
95
024681012
Load Current (Amps)
Efficiency (%)
VIN = 4.5V
VIN = 12V
VIN = 14V
Output Ripple and Noise (Vin=12V, Vout=2.5V, Iout=12A, Cload=188µF,
ScopeBW=20MHz) Trace2=Vout,10mV/div(AC)
On/Off Enable Delay (Vin=12V, Vout=2.5V, Iout=12A, Cload=188µF) Trace1=Enable,
5V/div Trace2=Vout,1V/div
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 8 of 19
www.murata-ps.com/support
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OKL2-T/12-W12 PERFORMANCE DATA AND OSCILLOGRAMS
Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=1.8V)
0
2
4
6
8
10
12
14
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Output Current (Amps)
Ambient Temperature
(°C)
0.2 m/s (40 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
Step Load Transient Response (Vin=12V, Vout=1.8V, Cload=188µF, Iout=6A to 12A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Step Load Transient Response (Vin=12V, Vout=1.8V, Cload=188µF, Iout=12A to 6A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Effi ciency vs. Line Voltage and Load Current @Ta = +25 °C (Vout = 1.8V)
75
80
85
90
100
95
024681012
Load Current (Amps)
Efficiency (%)
VIN = 4.5V
VIN = 12V
VIN = 14V
Output Ripple and Noise (Vin=12V, Vout=1.8V, Iout=12A, Cload=188µF,
ScopeBW=20MHz) Trace2=Vout,10mV/div(AC)
On/Off Enable Delay (Vin=12V, Vout=1.8V, Iout=12A, Cload=188µF) Trace1=Enable,
5V/div Trace2=Vout,500mV/div
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 9 of 19
www.murata-ps.com/support
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OKL2-T/12-W12 PERFORMANCE DATA AND OSCILLOGRAMS
Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=1.2V)
0
2
4
6
8
10
12
14
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Output Current (Amps)
Ambient Temperature
(°C)
0.2 m/s (40 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
Step Load Transient Response (Vin=11V, Vout=1.2V, Cload=188µF, Iout=6A to 12A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Step Load Transient Response (Vin=11V, Vout=1.2V, Cload=188µF, Iout=12A to 6A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Effi ciency vs. Line Voltage and Load Current @Ta = +25 °C (Vout = 1.2V)
024681012
75
80
85
90
70
95
Load Current (Amps)
Efficiency (%)
VIN = 4.5V
VIN = 7V
VIN = 11V
Output Ripple and Noise (Vin=11V, Vout=1.2V, Iout=12A, Cload=188µF,
ScopeBW=20MHz) Trace2=Vout,10mV/div(AC)
On/Off Enable Delay (Vin=11V, Vout=1.2V, Iout=12A, Cload=188µF) Trace1=Enable,
5V/div Trace2=Vout,500mV/div
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 10 of 19
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OKL2-T/12-W12 PERFORMANCE DATA AND OSCILLOGRAMS
Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=0.69V)
0
2
4
6
8
10
12
14
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Output Current (Amps)
Ambient Temperature
(°C)
0.2 m/s (40 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
Step Load Transient Response (Vin=7V, Vout=0.69V, Cload=188µF, Iout=6A to 12A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Step Load Transient Response (Vin=7V, Vout=0.69V, Cload=188µF, Iout=12A to 6A)
Trace 2=Vout, 100 mV/div, Trace 4=Iout, 10A/div.
Effi ciency vs. Line Voltage and Load Current @Ta = +25 °C (Vout = 0.69V)
75
80
85
90
70
95
024681012
Load Current (Amps)
Efficiency (%)
VIN = 4.5V
VIN = 5V
VIN = 7V
Output Ripple and Noise (Vin=7V, Vout=0.69V, Iout=12A, Cload=188µF,
ScopeBW=20MHz) Trace2=Vout,10mV/div(AC)
On/Off Enable Delay (Vin=7V, Vout=0.69V, Iout=12A, Cload=188µF) Trace1=Enable,
5V/div Trace2=Vout,200mV/div
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 11 of 19
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MECHANICAL SPECIFICATIONS
INPUT/OUTPUT CONNECTIONS
Pin Function
1 On/Off Control*
2 VIN
3 Sequence/Tracking
4 Ground
5 Trim
6 VOUT
7 +Sense (VOUT)
8 -Sense (Ground)
9 Power Good Out
10 Syncronization
*The Remote On/Off can be provided with
either positive (P suffi x) or negative (N suffi x)
logic.
Third Angle Projection
Dimensions are in inches (mm shown for ref. only).
Components are shown for reference only.
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 1˚
SIDE VIEW
TOP VIEW
SOLDER PAD NOTES:
[1] To avoid incorrect contacts with exposed vias and plated through holes on the bottom of the
converter, do not have any exposed copper in the center area of the host PCboard (see drawing).
Except for connections to the pads, keep all external circuits away from the board edges.
[2] Do not connect any additional components between the Trim pin and Vout or between the Trim
and Sense pins. Use only the specified connections.
8.55max
BOTTOM VIEW
UNIT[mm]
2.44×1.73×10PLACES
45 6
7
8
1
9
3
10
2
0
Y
X
11.43
10.16
5.72
1.27
1.52
6.35
10.41
14.48
19.05
20.32
18.80
[Tolerances ±0.25mm]
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 12 of 19
www.murata-ps.com/support
Figure 3. OKL2-T/12-W12 Mechanical Outline
Muroto Power Solutions fikami 20 32 4 PLACES A.E‘p Prndein 1 “x 1 n Prodfltmmilm Unit : mm O
RECOMMENDED LAYOUT
Third Angle Projection
Dimensions are in inches (mm shown for ref. only).
Components are shown for reference only.
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 1˚


OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 13 of 19
www.murata-ps.com/support
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TAPE AND REEL INFORMATION (MSL RATING 2)
Tape Detail
Reel Detail
A-A’ SECTION
B-B’ SECTION
Vacuum Pickup
Point in Center
Pulling direction
Reel Information (250 units per reel)
Key Description Length (mm)
A Tape trailer (no modules) 240±40
B Pocket tape length before modules 180 min
C Cover tape length before pocket tape 240±40
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 14 of 19
www.murata-ps.com/support
Muroto Power Solutions mkami
Output Voltage Adustment
The output voltage may be adjusted over a limited range by connecting an
external trim resistor (Rtrim) between the Trim pin and Ground. The Rtrim
resistor must be a 1/10 Watt precision metal fi lm type,±0.5% accuracy or
better with low temperature coeffi cient, ±100 ppm/degC. or better. Mount
the resistor close to the converter with very short leads or use a surface
mount trim resistor.
In the table below, the calculated resistance is given. Do not exceed the
specifi ed limits of the output voltage or the converter’s maximum power
rating when applying these resistors. Also, avoid high noise at the Trim
input. However, to prevent instability, you should never connect any capaci-
tors to Trim.
OKL2-T/12-W12
Output Voltage Calculated Rtrim (KΩ)
5.0 V 1.60
3.3 V 2.64
2.5 V 3.81
2.0 V 5.27
1.8 V 6.22
1.5 V 8.52
1.2 V 13.53
1.0 V 22.26
0.69 V ∞ (open)
Resistor Trim Equation, OKL2-T/12-W12 models:
Input Fusing
Certain applications and/or safety agencies may require fuses at the inputs
of power conversion components. Fuses should also be used when there
is the possibility of sustained input voltage reversal which is not current
limited. For greatest safety, we recommend a fast blow fuse installed in the
ungrounded input supply line.
The installer must observe all relevant safety standards and regulations.
For safety agency approvals, install the converter in compliance with the
end-user safety standard.
Input Under-Voltage Shutdown and Start-Up Threshold
Under normal start-up conditions, converters will not begin to regulate
properly until the ramping-up input voltage exceeds and remains at the
Start-Up Threshold Voltage (see Specifi cations). Once operating, convert-
ers will not turn off until the input voltage drops below the Under-Voltage
Shutdown Limit. Subsequent restart will not occur until the input voltage
rises again above the Start-Up Threshold. This built-in hysteresis prevents
any unstable on/off operation at a single input voltage.
Users should be aware however of input sources near the Under-Voltage
Shutdown whose voltage decays as input current is consumed (such as
capacitor inputs), the converter shuts off and then restarts as the external
capacitor recharges. Such situations could oscillate. To prevent this, make
sure the operating input voltage is well above the UV Shutdown voltage AT
ALL TIMES.
Start-Up Time
Assuming that the output current is set at the rated maximum, the Vin to
Vout Start-Up Time (see Specifi cations) is the time interval between the
point when the ramping input voltage crosses the Start-Up Threshold and
the fully loaded regulated output voltage enters and remains within its
specifi ed accuracy band. Actual measured times will vary with input source
impedance, external input capacitance, input voltage slew rate and fi nal
value of the input voltage as it appears at the converter.
These converters include a soft start circuit to moderate the duty cycle of
its PWM controller at power up, thereby limiting the input inrush current.
The On/Off Remote Control interval from On command to Vout regulated
assumes that the converter already has its input voltage stabilized above
the Start-Up Threshold before the On command. The interval is measured
from the On command until the output enters and remains within its
specifi ed accuracy band. The specifi cation assumes that the output is fully
loaded at maximum rated current. Similar conditions apply to the On to Vout
regulated specifi cation such as external load capacitance and soft start
circuitry.
Recommended Input Filtering
The user must assure that the input source has low AC impedance to
provide dynamic stability and that the input supply has little or no inductive
content, including long distributed wiring to a remote power supply. The
converter will operate with no additional external capacitance if these
conditions are met.
For best performance, we recommend installing a low-ESR capacitor
immediately adjacent to the converter’s input terminals. The capacitor
should be a ceramic type such as the Murata GRM32 series or a poly-
mer type. Initial suggested capacitor values are 44 µF, rated at twice the
expected maximum input voltage. Make sure that the input terminals do
not go below the under voltage shutdown voltage at all times. More input
bulk capacitance may be added in parallel (either electrolytic or tantalum)
if needed.
Recommended Output Filtering
The converter will achieve its rated output ripple and noise with no
additional external capacitor. However, the user may install more exter-
nal output capacitance to reduce the ripple even further or for improved
dynamic response. Again, use low-ESR ceramic (Murata GRM32 series) or
polymer capacitors. Initial values of 188 µF may be tried, either single or
multiple capacitors in parallel. Mount these close to the converter. Measure
the output ripple under your load conditions.
Use only as much capacitance as required to achieve your ripple and noise
objectives. Excessive capacitance can make step load recovery sluggish
or possibly introduce instability. Do not exceed the maximum rated output
capacitance listed in the specifi cations.
TECHNICAL NOTES
RTRIM (k) = _________
VOUT – 0.69
6.9
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 15 of 19
www.murata-ps.com/support
Mum power sauna“.s Warm
Input Ripple Current and Output Noise
All models in this converter series are tested and specifi ed for input
refl
ected ripple current and output noise using designated external input/
output components, circuits and layout as shown in the fi gures below. The
Cbus and Lbus components simulate a typical DC voltage bus. Please note
that the values of Cin, Lbus and Cbus will vary according to the specifi c
converter model.
Minimum Output Loading Requirements
All models regulate within specifi cation and are stable under no load to full
load conditions. Operation under no load might, however, slightly increase
output ripple and noise.
Thermal Shutdown
To prevent many over temperature problems and damage, these converters
include thermal shutdown circuitry. If environmental conditions cause the
temperature of the DC-DCs to rise above the Operating Temperature Range
up to the shutdown temperature, an on-board electronic temperature
sensor will power down the unit. When the temperature decreases below
the turn-on threshold, the converter will automatically restart.
CAUTION: If you operate too close to the thermal limits, the converter
may shut down suddenly without warning. Be sure to thoroughly test your
application to avoid unplanned thermal shutdown.
C
IN
V
IN
C
BUS
L
BUS
C
IN
= 2 x 100µF, ESR < 700mΩ @ 100kHz
C
BUS
= 1000µF, ESR < 100mΩ @ 100kHz
L
BUS
= 1µH
+VIN
-VIN
CURRENT
PROBE
TO
OSCILLOSCOPE
+
–
+
–
Figure 4. Measuring Input Ripple Current
Temperature Derating Curves
The graphs in this data sheet illustrate typical operation under a variety of
conditions. The derating curves show the maximum continuous ambient air
temperature and decreasing maximum output current which is accept-
able under increasing forced airfl ow measured in Linear Feet per Minute
(“LFM”). Note that these are AVERAGE measurements. The converter will
accept brief increases in current or reduced airfl ow as long as the average
is not exceeded.
Note that the temperatures are of the ambient airfl ow, not the converter
itself which is obviously running at higher temperature than the outside
air. Also note that very low fl ow rates (below about 25 LFM) are similar to
“natural convection”, that is, not using fan-forced airfl ow. Murata makes
Characterization measurements in a closed cycle wind tunnel with cali-
brated airfl ow. We use both thermocouples and an infrared camera system
to observe thermal performance.
CAUTION: These graphs are all collected at slightly above Sea Level
altitude. Be sure to reduce the derating for higher density altitude.
Output Voltage Sequencing
The OKL modules include a sequencing feature that enables users to
implement various types of output voltage sequencing in their applications.
This is accomplished via an additional sequencing pin. When not using the
sequencing feature, either tie the sequence pin to Vin or leave it uncon-
nected.
When an analog voltage is applied to the sequence pin, the output
voltage tracks this voltage until the output reaches the set-point voltage.
The fi nal value of the sequence voltage must be set higher than the set-
point voltage of the module. The output voltage follows the voltage on the
sequence pin on a one-to-one volt basis. By connecting multiple modules
together, multiple modules can track their output voltages to the voltage
applied on the sequence pin.
For proper voltage sequencing, fi rst, input voltage is applied to the
module. The On/Off pin of the module is left unconnected (or tied to GND
for negative logic modules or tied to Vin for positive logic modules) so that
the module is ON by default. After applying input voltage to the module,
a minimum 10msec delay is required before applying voltage on the
sequence pin. During this time, a voltage of 50mV (± 20 mV) is maintained
on the sequence pin. This delay gives the module enough time to complete
its internal powerup soft-start cycle. During the delay time, the sequence
pin should be held close to ground (nominally 50mV ± 20 mV). This is re-
quired to keep the internal opamp out of saturation thus preventing output
overshoot during the start of the sequencing ramp. By selecting resistor R1
according to the following equation
the voltage at the sequencing pin will be 50mV when the sequencing
signal is at zero. See fi gure 6 for R1 connection for the sequencing signal to
the SEQ pin.
RLOAD
SCOPE
+VOUT
-VOUT
Cext
Figure 5. Measuring Output Ripple and Noise (PARD)
The capacitor Cext value is found on the electrical data page.
R1 = ———— ohms,
Vin – 0.05
23500
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 16 of 19
www.murata-ps.com/support
Mum power sauna“.s ”0km fl \ fL
Output Current Limiting
Current limiting inception is defi ned as the point at which full power falls
below the rated tolerance. See the Performance/Functional Specifi ca-
tions. Note particularly that the output current may briefl y rise above its
rated value in normal operation as long as the average output power is
not exceeded. This enhances reliability and continued operation of your
application. If the output current is too high, the converter will enter the
short circuit condition.
Output Short Circuit Condition
When a converter is in current-limit mode, the output voltage will drop as
the output current demand increases. Following a time-out period, the
PWM will restart, causing the output voltage to begin ramping up to its
appropriate value. If the short-circuit condition persists, another
shutdown cycle will initiate. This rapid on/off cycling is called “hiccup
mode”. The hiccup cycling reduces the average output current, thereby
preventing excessive internal temperatures and/or component damage. A
short circuit can be tolerated indefinitely.
BOM Rp 20K
BOM Q1 Q SMT MOS P 30V
GND GND
+Vin +Vin
Rp
Q1
R1
E
PWM
OKL P Module
On/Off
Figure 6. On/Off Circuit Control for Using Positive On/Off Logic
BOM Rp 20K
BOM Q1 Q SMT MOS P 30V
GND GND
+Vin +Vin
Rp
Q1
Q3
E
GND
OKL N Module
On/Off
PWM
Figure 7. On/Off Circuit Control for Using Negative On/Off Logic
The “hiccup” system differs from older latching short circuit systems
because you do not have to power down the converter to make it restart.
The system will automatically restore operation as soon as the short circuit
condition is removed.
Remote On/Off Control
The OKL Series power modules can be specifi ed with either a positive or nega-
tive logic type. See Figures 6 and 7 for On/Off circuit control. In the positive logic
on/off option the unit turns on during a logic high on the On/Off pin and turns off
during a logic low. In a negative logic on/off option, the unit turns off during logic
high and on during logic low. The On/Off signal should always be reference to
ground. For positive or negative option, leaving then On/Off pin disconnected
will turn the unit on when input voltage is present.
Positive—Units are enabled when the on/off pin is left open or is pulled
high to +Vin. The On/Off circuit control is shown in fi gure 6. When the
external transistor Q1 is in the off state, the internal PWM enable pin is pull
high causing the unit to turn on. When Q1 is turn on, the On/Off pin is pulled
low and the units is off. Rp should be around 20K ohms.
Negative—Units are enabled when the ON/Off is open or brought to
within a low voltage (see specifi cations) with respect to –Vin. The unit is off
when the ON/Off is pulled high with respect to –Vin (see specifi cations). The
On/Off circuitry is shown in fi gure 7. The On/Off pin should be pulled high
with an external pull-up resistor (20K ohms). When Q1 is in the off state,
the On/Off pin is pulled high, transistor Q3 is turn on and the unit is off. To
turn on the unit, Q1 is turn on, pulling the On/Off pin low and turning Q3 off
resulting on the unit being on.
Dynamic control of the On/Off function should be able to sink the speci-
fi ed signal current when brought low and withstand appropriate voltage
when brought high. Be aware too that there is a fi nite time in milliseconds
(see specifi cations) between the time of On/Off Control activation and
stable, regulated output. This time will vary slightly with output load type
and current and input conditions.
Output Capacitive Load
These converters do not require external capacitance added to achieve
rated specifi
cations. Users should only consider adding capacitance to
reduce switching noise and/or to handle spike current load steps. Install
only enough capacitance to achieve noise objectives. Excess external
capacitance may cause regulation problems, degraded transient response
and possible oscillation or instability.
Synchronization
These converters can be synchronized using an external signal.
Details of the SYNC signal are provided in the Performance and Func-
tional Specifi
cations table.
If the synchronization function is not being used, leave the SYNC pin
fl oating.
When synchronization function is used, output ripple may increase on
some operating conditions. Please check the proper operation of this device
with the peripheral circuits on your system.
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 17 of 19
www.murata-ps.com/support
,7 Murcia Power Solutions *[Dkaml VII/I/I/IIII/Illl/III/Illl/I/I/I/II/I/Il/III/I/Il/I/I/I/Il/Il /' \
Soldering Guidelines
Murata Power Solutions recommends the specifi cations below when installing these
converters. These specifi cations vary depending on the solder type. Exceeding these
specifi cations may cause damage to the product. Your production environment may differ
therefore please thoroughly review these guidelines with your process engineers.
Reflow Solder Operations for surface-mount products (SMT)
For Sn/Ag/Cu based solders:
Preheat Temperature Less than 1 ºC. per second
Time over Liquidus 45 to 75 seconds
Maximum Peak Temperature 260 ºC.
Cooling Rate Less than 3 ºC. per second
For Sn/Pb based solders:
Preheat Temperature Less than 1 ºC. per second
Time over Liquidus 60 to 75 seconds
Maximum Peak Temperature 235 ºC.
Cooling Rate Less than 3 ºC. per second
0
50
100
150
200
250
0 30 60 90 120 150 180 210 240 270 300
Time (sec)
Temperature (°C)
Preheating Zone
240 sec max
Soaking Zone
120 sec max
Reflow Zone
time above 217° C
45-75 sec
Peak Temp.
235-260° C
<1.5° C/sec High trace = normal upper limit
Low trace = normal lower limit
Recommended Lead-free Solder Refl ow Profi le
CAUTION: Do not refl ow the DC-DC converter as follows, because the
DC-DC converter may fall from the substrate during refl owing.
Substrate DC-DC Converter
0123456
0
2
4
6
8
10
12
14
16
Vin=14V / Vout=1V
Vin=4.5V / Vout=3.3V
Output Voltage (V)
Input Voltage (V)
Upper Limit
Lower Limit
5
6
7
8
9
10
11
12
13
14
15
0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5
without Sync (400kHz)
Sync 420kHz
Sync 520kHz
Sync 600kHz
Output Voltage (V)
Input Voltage (V)
Figure 8. Voltage Range Graph Figure 9 Voltage Range Graph (range expansion)
Voltage Range Graph
Please observe the limits below for voltage input and output ranges. These
limits apply at all output currents (Ta = 25°C).
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 18 of 19
www.murata-ps.com/support
Mm“. My salmon; Warm
Figure 10. Vertical Wind Tunnel
IR Video
Camera
IR Transparent
optical window Variable
speed fan
Heating
element
Ambient
temperature
sensor
Airflow
collimator
Precision
low-rate
anemometer
3” below UUT
Unit under
test (UUT)
Vertical Wind Tunnel
Murata Power Solutions employs a computer controlled
custom-designed closed loop vertical wind tunnel, infrared
video camera system, and test instrumentation for accurate
airfl ow and heat dissipation analysis of power products.
The system includes a precision low fl ow-rate anemometer,
variable speed fan, power supply input and load controls,
temperature gauges, and adjustable heating element.
The IR camera monitors the thermal performance of the
Unit Under Test (UUT) under static steady-state conditions. A
special optical port is used which is transparent to infrared
wavelengths.
Both through-hole and surface mount converters are
soldered down to a 10" x 10" host carrier board for realistic
heat absorption and spreading. Both longitudinal and trans-
verse airfl ow studies are possible by rotation of this carrier
board since there are often signifi cant differences in the heat
dissipation in the two airfl ow directions. The combination of
adjustable airfl ow, adjustable ambient heat, and adjustable
Input/Output currents and voltages mean that a very wide
range of measurement conditions can be studied.
The collimator reduces the amount of turbulence adjacent
to the UUT by minimizing airfl ow turbulence. Such turbu-
lence infl uences the effective heat transfer characteristics
and gives false readings. Excess turbulence removes more
heat from some surfaces and less heat from others, possibly
causing uneven overheating.
Both sides of the UUT are studied since there are different
thermal gradients on each side. The adjustable heating element
and fan, built-in temperature gauges, and no-contact IR camera mean
that power supplies are tested in real-world conditions.
OKL2-T/12-W12 Series
Programmable Output 12-Amp iLGA SMT PoL
DC-DC Converter Series
MDC_OKL2-T/12-W12.B03 Page 19 of 19
www.murata-ps.com/support
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. © 2018 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
129 Flanders Rd, Westborough, MA 01581 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/