www.murata-ps.com
OKY
-T/10 & T/16-D12 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
PRODUCT OVERVIEW
The OKY-T/10 and -T/16 series are miniature
SMT 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 remote sense. 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.
Typical unit
FEATURES
8.3-14 VDC input range
Wide
Non-isolated output adjustable from 0.7525 to
5.5 Volts up to 16 Amps
DOSA-compatible SMT package
Optional sequence/tracking operation
Outstanding thermal performance and derating
circuit protection
Short
On/Off control
efficiency up to 94.5%
High
temperature protection
Over
Meets UL/EN/IEC 60950-1 safety approvals.
Contents
Description, Connection Diagram, Photograph
Ordering Guide, Model Numbering
Mechanical Specifications, Input/Output Pinout
Detailed Electrical Specifications
Output Voltage Adjustment, Soldering Guidelines
Application Notes
Performance Data – OKY2-T/10-D12
Performance Data and Oscillograms – OKY2-T/16-D12
Tape and Reel Information
Product Label, MTBF Table
Page
1
2
3
4
5
6
9
11
16
17
Simplified Block 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
Figure 1. OKY-T/10, -T/16
Sequence/Tracking (OKY2 only)
Note: Murata Power Solutions strongly recommends an external input fuse, F1.
See specifications.
For full details go to
www.murata-ps.com/rohs
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MDC_OKY_T10T16.D12.A08
Page 1 of 17
OKY
-T/10 & T/16-D12 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
Performance Specifications Summary and Ordering Guide
ORDERING GUIDE
R/N (mVp-p) Regulation (Max.) V
IN
Efficiency
I
OUT
I
IN
,
I
IN
,
(Amps Power
Nom. Range no load full load
max) (Watts) Max.
Line
Load (Volts) (Volts) (mA) (Amps) Min. Typ.
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%
±0.22% ±0.25%
±0.22% ±0.25%
±0.22% ±0.25%
±0.22% ±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
93% 94.5%
Polarity
Sequence/
Track
Output
V
OUT
(Volts)
Input
On/Off
Package, C83
Model Number
➂
Case
➀
1.3x0.53x0.33
(33x13.5x8.4)
1.3x0.53x0.33
(33x13.5x8.4)
1.3x0.53x0.33
(33x13.5x8.4)
1.3x0.53x0.33
(33x13.5x8.4)
1.3x0.53x0.33
(33x13.5x8.4)
1.3x0.53x0.33
(33x13.5x8.4)
1.3x0.53x0.33
(33x13.5x8.4)
1.3x0.53x0.33
(33x13.5x8.4)
Pinout
P66
P66
P66
P66
P66
P66
P66
P66
OKY-T/10-D12P-C
0.7525-5.5
OKY-T/10-D12N-C
0.7525-5.5
OKY2-T/10-D12P-C
0.7525-5.5
OKY2-T/10-D12N-C
0.7525-5.5
OKY-T/16-D12P-C
0.7525-5.5
OKY-T/16-D12N-C
0.7525-5.5
OKY2-T/16-D12P-C
0.7525-5.5
OKY2-T/16-D12N-C
0.7525-5.5
➀
➁
➂
Dimensions are in inches (mm).
Pos.
No
No
Yes
Yes
No
No
Yes
Yes
93% 94.5% Neg.
93% 94.5%
Pos.
93% 94.5% Neg.
92.5% 94%
92.5% 94%
92.5% 94%
92.5% 94%
Pos.
Neg.
Pos.
Neg.
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.
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 Y 2
-
T
/
16
-
D12 P
-
C
Okami Non-isolated PoL
Surface Mount
Sequence/tracking
Blank=Not installed, delete seq/track contact
2=Installed, add seq/track contact
Trimmable Output
Voltage Range
D12 Models = 0.7525-5.5V
RoHS Hazardous
Substance Compliance
C
= RoHS-6 (does
not claim EU RoHS exemption 7b–lead in solder)
On/Off Polarity
P = Positive Polarity
N = Negative Polarity
Input Voltage Range
D12 = 8.3-14V
Maximum Rated Output
Current in Amps
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MDC_OKY_T10T16.D12.A08
Page 2 of 17
OKY
-T/10 & T/16-D12 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
MECHANICAL SPECIFICATIONS
PIN #1 THIS
CORNER (FARSIDE)
TOP
VIEW
13.5
0.53
REF
12.7
0.50
6.7
0.27
NOZZLE
PICKUP
POINT
ISOMETRIC
VIEW
END
VIEW
8.4
0.33
SIDE
VIEW
MTG PLANE
2.29
7x0.090
33.0
1.30
1.59
0.063
ALL CONTACTS
COPLANAR
WITHIN .004"
1.59
7x0.063
0.25
0.010
MIN
PIN
#1
3.05
0.120
19.30
0.760 REF
4x
4.83
0.190
3
BOTTOM
VIEW
2
4
5
6
7
1.91
0.075
10.29
0.405
13.5
0.53
0.64
0.025
29.89
1.177
1
1.23
0.048
33.0
1.30
REF
29.90
1.177
22.02
0.867
0.120[3.05]MIN
0.135[3.43]MAX
1.91
0.075
0.64
0.025
26.85
1.057
13.5
0.53
REF
2
3
4
5 6
7
1
7.54
0.297
10.29
0.405
DIMENSIONS ARE IN INCHES [mm]
TOLERANCES:
2 PLACE .02
3 PLACE .010
ANGLES:
1
0.095 [2.41] MIN
0.110 [2.79] MAX
12.37
0.487
17.20
0.677
1.22
0.048
COMPONENTS SHOWN ARE FOR REFERENCE ONLY
MATERIAL:
SMT PINS: COPPER ALLOY
RECOMMENDED PAD LAYOUT
I/O CONNECTIONS
Pin Function P66
1
On/Off Control *
2
+Vin
3
Vtrack Seq**
4
Gnd (Common)
5
+Vout
6
Trim
7
Sense
THIRD ANGLE PROJECTION
FINISH: (ALL PINS)
GOLD (5u"MIN) OVER NICKEL (50u" MIN)
* The Remote On/Off can be provided
with either positive (P suffix) or negative
(N suffix) polarity.
** Vtrack Seq applies only to OKY2
models. No connection for OKY models.
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MDC_OKY_T10T16.D12.A08
Page 3 of 17
OKY
-T/10 & T/16-D12 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
Performance and Functional Specifications
See Note 1
Input
Output, continued
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.
8.00V
7.75V)
None
20 mA pk-pk
Capacitive
15A (T/10); 20A (T/16)
N/A. See fuse information
See Ordering Guide
0.4 A
2
Sec.
5 mA
100 mA (T/10); 60 mA (T/16)
80 mA
6.34 A (T/10);10.2 A (T/16)
ON = Open pin or ground to +0.3V. max.
OFF =+2.5V min. to + Vin (max)
ON = Open pin to +Vin max.
(internally pulled up)
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
Short Circuit Duration
Prebias Startup
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° C. with derating (Note 9)
Operating PC Board Temperature
-40 to +100° C. max.,
no derating (12)
Storage Temperature Range
-55 to +125° C.
Thermal Protection/Shutdown
+130° C.
Relative Humidity
to 85%RH/+85° C., non-condensing
Physical
Outline Dimensions
Weight
Electromagnetic Interference
Current
Tracking/Sequencing
Slew Rate
Tracking accuracy, rising input
Tracking accuracy, falling input
Restriction of Hazardous Substances
MSL Rating
See Mechanical Specifications
0.1 ounces (2.8 grams)
Designed to meet FCC part 15, class B,
EN55022 and CISPR22 class B radiated
(may need external filter)
RoHS-6 (does
not claim EU RoHS exemption
7b–lead in solder)
2
Absolute Maximum Ratings
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
Calculated MTBF
Meets UL/cUL 60950-1,
CSA-C22.2 No. 60950-1, IEC/EN 60950-1
See table on page 17.
Output
Input Voltage (Continuous or transient)
On/Off Control
Input Reverse Polarity Protection
Output Current (Note 7)
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° C.
See soldering specifications
Output Voltage Range
Minimum Loading
Accuracy (50% load, untrimmed)
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
0.7525 to 5.5 V
No minimum load
±2 % of Vnominal
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
27 Amps (T/10); 33 Amps (T/16)
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.
Deleted
2A
Hiccup autorecovery upon overload
removal. (Note 17)
(4)
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MDC_OKY_T10T16.D12.A08
Page 4 of 17
OKY
-T/10 & T/16-D12 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
Specification Notes, Cont.:
(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.
Deleted.
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.
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 differ therefore please thoroughly review these guidelines with your process
engineers.
(6)
(7)
(8)
(9)
Reflow Solder Operations for surface-mount products (SMT)
(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 output is 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.
For Sn/Ag/Cu based solders:
Preheat Temperature
Time over Liquidus
Maximum Peak Temperature
Cooling Rate
For Sn/Pb based solders:
Preheat Temperature
Time over Liquidus
Maximum Peak Temperature
Cooling Rate
Less than 1 ºC. per second
60 to 75 seconds
235 ºC.
Less than 3 ºC. per second
Less than 1 ºC. per second
45 to 75 seconds
260 ºC.
Less than 3 ºC. per second
Recommended Lead-free Solder Reflow Profile
250
Peak Temp.
235-260° C
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.
OKY2-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)
200
Temperature (°C)
150
Soaking Zone
120 sec max
100
<1.5° C/sec
50
240 sec max
Reflow Zone
time above 217° C
45-75 sec
Preheating Zone
High trace = normal upper limit
Low trace = normal lower limit
0
0
30
60
90
120
150
Time (sec)
180
210
240
270
300
High trace = normal upper limit
Low trace - normal lower limit
Resistor Trim Equation, D12 models:
10500
R
TRIM
() = _____________ –1000
V
OUT
– 0.7525V
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MDC_OKY_T10T16.D12.A08
Page 5 of 17
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