www.murata-ps.com
OKX
T/10 & T/16-D12 Series
Adjustable DOSA 10/16-Amp SIP DC/DC Converters
FEATURES
Non-isolated SIP POL DC/DC power module
8.3-14Vdc input voltage range
Programmable output voltage from 0.7525-5.5Vdc
Amp (T/10) or 16 Amp (T/16) output current
10
models
Drives 1000 μF ceramic capacitive loads
power conversion efficiency 94.5% at 3.3
High
Vout
Outstanding thermal derating performance
temperature and over current protection
Over
On/Off control, Sense and optional Sequence/
Tracking input
UL/EN/IEC 60950-1 safety
Industry-standard (DOSA) SIP format
RoHS-6 hazardous substance compliance
Typical unit
PRODUCT OVERVIEW
The OKX-T/10 and -T/16 series are miniature
SIP non-isolated Point-of-Load (POL) DC/DC power
converters for embedded applications. The module
is fully compatible with Distributed-power Open
Standards Alliance (DOSA) industry-standard
specifications (www.dosapower.com). Applications
include powering CPU’s, datacom/telecom systems,
programmable logic and mixed voltage systems.
The wide input range is 8.3 to 14 Volts DC. Two
maximum output currents are offered, 10 Amps
(T/10 models) or 16 Amps (T/16 models). 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. An
optional Sequence/Tracking input allows controlled
ramp-up and ramp-down outputs. The Sense input
provides load compensation. These converters also
include under voltage lock out (UVLO), output short
circuit protection, over-current and over tempera-
ture protections.
These units are designed to meet all standard
UL/EN/IEC 60950-1 safety and FCC EMI/RFI
emissions certifications and RoHS-6 hazardous
substance compliance.
Connection Diagram
+Vin
F1
+Vout
On/Off
Control
Sense
Controller
External
DC
Power
Source
Trim
Open = On
Closed = Off
(Positive
On/Off)
Common
Reference and
Error Amplifier
Common
Sequence/Tracking (optional)
Figure 1. OKX2-T/10, -T/16
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_OKX2_T10T16.B07
Page 1 of 16
OKX
T/10 & T/16-D12 Series
Adjustable DOSA 10/16-Amp SIP DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Input
Efficiency
Min.
93%
93%
93%
93%
92.5%
92.5%
92.5%
92.5%
Typ.
94.5%
94.5%
94.5%
94.5%
94%
94%
94%
94%
Pos.
Neg.
Pos.
Neg
Pos.
Neg.
Pos.
Neg.
no
no
yes
yes
no
no
yes
yes
On/Off Sequence/
Logic Tracking
Package C86,
Pinout P84
Case
Dimensions are
in inches (mm)
Model Number
➁
OKX-T/10-D12P-C
OKX-T/10-D12N-C
OKX2-T/10-D12P-C
OKX2-T/10-D12N-C
OKX-T/16-D12P-C
OKX-T/16-D12N-C
OKX2-T/16-D12P-C
OKX2-T/16-D12N-C
V
OUT
(Volts)
0.7525-5.5
0.7525-5.5
0.7525-5.5
0.7525-5.5
0.7525-5.5
0.7525-5.5
0.7525-5.5
0.7525-5.5
Regulation (Max.)
I
OUT
R/N
Iin,
Iin,
(Amps Power
(mVp-p)
Vin Nom. Range no load full load
Line
Load
(mA)
(Amps)
max) (Watts)
Max.
(Volts) (Volts)
➀
10
10
10
10
16
16
16
16
50
50
50
50
80
80
80
80
40
40
40
40
40
40
40
40
±0.15% ±0.25%
±0.15% ±0.25%
±0.15% ±0.25%
±0.15% ±0.25%
±0.15% ±0.25%
±0.15% ±0.25%
±0.15% ±0.25%
±0.15% ±0.25%
12
12
12
12
12
12
12
12
8.3-14
8.3-14
8.3-14
8.3-14
8.3-14
8.3-14
8.3-14
8.3-14
80
80
80
80
80
80
80
80
4.41
4.41
4.41
4.41
7.09
7.09
7.09
7.09
2.0x0.5x0.37
(50.8x12.7x9.4)
2.0x0.5x0.37
(50.8x12.7x9.4)
2.0x0.5x0.37
(50.8x12.7x9.4)
2.0x0.5x0.37
(50.8x12.7x9.4)
2.0x0.5x0.37
(50.8x12.7x9.4)
2.0x0.5x0.37
(50.8x12.7x9.4)
2.0x0.5x0.37
(50.8x12.7x9.4)
2.0x0.5x0.37
(50.8x12.7x9.4)
➀
②
The input voltage range must be 13.2 Volts max. for Vout >= 3.63 V.
All specifications are at nominal line voltage, Vout=nominal (5V for D12 models) and full load, +25 deg.C. unless
otherwise noted.
Output capacitors are 1 μF ceramic and 10 μF electrolytic in parallel. 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.
③
④
Use adequate ground plane and copper thickness adjacent to the converter.
Ripple and Noise (R/N) is shown at Vout=1V. See specs for details.
PART NUMBER STRUCTURE
OK X 2
-
T
/
16
-
D12 P Lx
-
C
Okami Non-isolated PoL
SIP Mount
Sequence/Tracking
Blank = Not installed, delete pin 9
2 = Installed, add pin 9
Trimmable Output
Voltage Range
D12 Models = 0.7525-5.5V
Maximum Rated Output
Current in Amps
On/Off Logic
P = Positive Logic
N = Negative Logic
Input Voltage Range
D12 = 8.3-14V
Pin Length Option
Blank
= Standard pin length
L6
= Pin length 0.138 inches (3.5mm)*
RoHS Hazardous Substance Compliance
C
= RoHS-6 (does not claim EU RoHS
exemption 7b–lead in solder)
*Special
quantity order is
required; samples available
with standard pin length only.
Note:
Some model number combinations
may not be available. See website
or contact your local Murata sales
representative.
www.murata-ps.com/support
MDC_OKX2_T10T16.B07
Page 2 of 16
OKX
T/10 & T/16-D12 Series
Adjustable DOSA 10/16-Amp SIP DC/DC Converters
Performance and Functional Specifications
See Note 1
Input
Short Circuit Duration
Prebias Startup
Input Voltage Range
Start-Up Voltage
Undervoltage Shutdown (see Note 15)
Overvoltage Shutdown
Reflected (Back) Ripple Current (Note 2)
Internal Input Filter Type
Recommended External Fuse
Reverse Polarity Protection
Input Current:
Full Load Conditions
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output in Short Circuit
No Load
Low Line (Vin=Vmin, Vout=Vnom)
Remote On/Off Control (Note 5)
Negative Logic (“N” model suffix)
Positive Logic (“P” model suffix)
See Ordering Guide and Note 7.
7.75V
7.50V
None
25 mA pk-pk
Capacitive
15A
N/A. See fuse information
See Ordering Guide
0.4 A
2
Sec.
5 mA
100 mA
80 mA
10.2 A. (OKX-T/16-D12),
6.34A (OKX-T/10-D12)
ON = Open pin or ground to +0.3V. max.
OFF =+2.5V min. to + Vin (max)
ON = Open pin (internally pulled up) to
+Vin max.
OFF = Ground pin to +0.3V. max.
1 mA max.
2 Volts per millisecond, max.
Vout = +/-100 mV of Sequence In
Vout = +/-200 mV of Sequence In
Continuous, no damage
(output shorted to ground)
Converter will start up if the external
output voltage is less than Vset
Dynamic Load Response
75 μSec max. to within ±2% of final value
(50-100% load step, di/dt=2.5A/μSec)
Environmental
Operating Temperature Range (Ambient)
See derating curves
-40 to +85 deg. C. with derating (Note 9)
Operating PC Board Temperature
-40 to +100 deg. Celsius max.,
no derating (12)
Storage Temperature Range
-55 to +125 deg. C.
Thermal Protection/Shutdown
+130 deg. Celsius
Relative Humidity
to 85%RH/+85 deg. C., non-condensing
Physical
Outline Dimensions
Weight
Electromagnetic Interference
Restriction of Hazardous Substances
See Mechanical Specifications
0.2 ounces (5.6 grams)
Designed to meet FCC part 15, class B,
EN55022 and CISPR22 class B conducted
and radiated (may need external filter)
RoHS-6
(does not claim EU RoHS
exemption 7b–lead in solder)
Absolute Maximum Ratings
Current
Tracking/Sequencing (OKX “2” models)
Slew Rate
Tracking accuracy, rising input
Tracking accuracy, falling input
Input Voltage (Continuous or transient)
On/Off Control
Input Reverse Polarity Protection
Output Current (Note 7)
General and Safety
Efficiency
Switching Frequency
See Ordering Guide
300 KHz ± 25 kHz
Start-Up Time (Vin on to Vout regulated) 8 mSec for Vout=nominal
(On/Off to Vout regulated)
8 mSec for Vout=nominal
Isolation
Not isolated
Safety
Designed to meet UL/cUL 60950-1,
CSA-C22.2 No. 60950-1, IEC/EN 60950-1
Calculated MTBF per Telcordia SR-232 (4a) 6.54
MHours
(OKX2-T/16-D12P)
Calculated MTBF per MIL-HDBK-217F (4b) 5.3
MHours
(OKX2-T/16-D12P)
Output
Storage Temperature
Lead Temperature
0 V.to +15 Volts max. (D12 models)
0 V. min. to +Vin max.
See Fuse section
Current-limited. Devices can withstand a
sustained short circuit without damage.
The outputs are not intended to accept
appreciable reverse current.
-55 to +125 deg. C.
See soldering specifications
Absolute maximums are stress ratings. Exposure of devices to greater than any of 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 nor recommended.
Specification Notes:
(1)
Specifications are typical at +25 deg.C, Vin=nominal (+12V. for D12 models), Vout=nominal (+5V for D12
models), full load, external caps and natural convection unless otherwise indicated. Extended tests at higher
power must supply substantial forced airflow.
All models are tested and specified with external 1 μF paralleled with 10 μF ceramic/tantalum 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)
(3)
Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering is
Cin=2 x 100 μF tantalum, Cbus=1000 μF electrolytic, Lbus=1 μH.
Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher
temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current outputs if the total
RMS current over time does not exceed the Derating curve.
Output Voltage Range
Minimum Loading
Accuracy (50% load, untrimmed)
Voltage Output Range (Note 13)
Overvoltage Protection (Note 16)
Temperature Coefficient
Ripple/Noise (20 MHz bandwidth)
Line/Load Regulation
Maximum Capacitive Loading (Note 14)
Cap-ESR=0.001 to 0.01 Ohms
Cap-ESR >0.01 Ohms
Current Limit Inception (Note 6)
(98% of Vout setting, after warm up)
Short Circuit Mode
Short Circuit Current Output
Protection Method
See Ordering Guide
No minimum load
±2 % of Vnominal
See Ordering Guide
None
±0.02% per oC of Vout range
See Ordering Guide and note 8
See Ordering Guide and note 10
1,000 μF
5,000 μF
30 Amps (OKX2-T/16-D12)
25 Amps (OKX2-T/10-D12)
2A
Hiccup autorecovery upon overload
removal. (Note 7)
(4a) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ISSUE 2,
ground fixed controlled conditions, Tambient=+25 deg.C, full output load, natural air convection.
(4b) Mean Time Before Failure is calculated using MIL-HDBK-217F, GB ground benign, Tambient=+25 deg.C, full
output load, natural air 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 not exceed
+Vin.
Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected
setting.
(6)
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MDC_OKX2_T10T16.B07
Page 3 of 16
OKX
T/10 & T/16-D12 Series
Adjustable DOSA 10/16-Amp SIP DC/DC Converters
Specification Notes, Cont.:
(7)
“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.
Output noise may be further reduced by adding an external filter. At zero output current, the output may
contain low frequency components which exceed the ripple specification. The output may be operated
indefinitely with no load.
All models are fully operational and meet published specifications, including “cold start” at –40°C.
OKX2-T/10-D12, -T/16-D12
Output Voltage
5.0 V.
3.3 V.
2.5 V.
2.0 V.
1.8 V.
1.5 V.
1.2 V.
1.0 V.
0.7525 V.
Calculated Rtrim (KΩ)
1.472
3.122
5.009
7.416
9.024
13.05
22.46
41.424
∞ (open)
(8)
(9)
(10) Regulation specifications describe the deviation as the line input voltage or output load current is varied
from a nominal midpoint value to either extreme.
(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 specifications 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 Application 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.
Output Voltage Adjustment
The output voltage may be adjusted over a limited range by connect-
ing an external trim resistor (Rtrim) between the Trim pin and Ground. The
Rtrim resistor must be a 1/10 Watt precision metal film type, ±1% accuracy
or better with low temperature coefficient, ±100 ppm/°C. or better. Mount
the resistor close to the converter with very short leads or use a surface
mount trim resistor.
In the tables opposite, the calculated resistance is given. Do not exceed
the specified 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.
Resistor Trim Equation, D12 models:
10500
R
TRIM
() = ________________ –1000
V
OUT
– 0.7525V
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 on page 1. Here is the layout of the label:
The label contains two rows of information:
Mfg.
date
code
Y01003
YMDX Rev.
Product code
Revision level
Figure 2.
Label Artwork Layout
First row – Model number product code (see table)
Second row – Manufacturing date code and revision level
Model Number
Product Code
X00116
X01116
X01116L
X20116
X21116
X00110
X01110
X20110
X21110
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these
converters. These specifications vary depending on the solder type. Exceeding these
specifications may cause damage to the product. Your production environment may dif-
fer; therefore please thoroughly review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted products (THMT)
OKX-T/16-D12N-C
OKX-T/16-D12P-C
OKX-T/16-D12PL6-C
OKX2-T/16-D12N-C
OKX2-T/16-D12P-C
OKX-T/10-D12N-C
OKX-T/10-D12P-C
OKX2-T/10-D12N-C
115° C.
270° C.
7 seconds
OKX2-T/10-D12P-C
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature
Maximum Pot Temperature
Maximum Solder Dwell Time
For Sn/Pb based solders:
Maximum Preheat Temperature
Maximum Pot Temperature
Maximum Solder Dwell Time
105° C.
250° C.
6 seconds
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 = O and
11 through 31 = A through Z)
Fourth character – Manufacturing information
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MDC_OKX2_T10T16.B07
Page 4 of 16
OKX
T/10 & T/16-D12 Series
Adjustable DOSA 10/16-Amp SIP DC/DC Converters
PERFORMANCE DATA
OKX2-T/10-D12 Efficiency vs. Line Voltage and Load Current @ +25°C
(V
OUT
= 0.7525V)
84
10.5
11
OKX2-T/10-D12-C Maximum Current Temperature Derating at Sea Level
(V
IN
= 12V, V
OUT
= 0.75V).
79
Output Current (Amps)
74
Efficiency (%)
V
IN
= 8.3V
V
IN
= 12V
V
IN
= 14V
10
Natural convection
9.5
69
64
9
59
8.5
54
1
2
3
4
5
6
7
8
9
10
8
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (ºC)
Load Curre nt (Amps)
OKX2-T/10-D12 Efficiency vs. Line Voltage and Load Current @ +25°C
(V
OUT
= 1V)
84
OKX2-T/10-D12 Efficiency vs. Line Voltage and Load Current @ +25°C
(V
OUT
= 1.2V)
89
79
V
IN
= 8.3V
V
IN
= 12V
V
IN
= 14V
84
74
Efficiency (%)
69
Efficiency (%)
79
V
IN
= 8.3V
V
IN
= 12V
V
IN
= 14V
74
64
59
69
54
1
2
3
4
5
6
7
8
9
10
Load Current (Amps)
64
1
2
3
4
5
6
7
8
9
10
Load Current (Amps)
OKX2-T/10-D12 Efficiency vs. Line Voltage and Load Current @ +25°C
(V
OUT
= 1.5V)
91
86
Efficiency (%)
81
V
IN
= 8.3V
V
IN
= 12V
V
IN
= 14V
76
71
66
1
2
3
4
5
6
7
8
9
10
Load Current (Amps)
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MDC_OKX2_T10T16.B07
Page 5 of 16
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