Datasheet

Performance and Functional Specifi cations
See Note 1
Input
Input Voltage Range See Ordering Guide and Note 7.
Start-Up Voltage 7.75V
Undervoltage Shutdown (see Note 15) 7.50V
Overvoltage Shutdown None
Refl ected (Back) Ripple Current (Note 2) 25 mA pk-pk
Internal Input Filter Type Capacitive
Recommended External Fuse 15A
Reverse Polarity Protection N/A. See fuse information
Input Current:
Full Load Conditions See Ordering Guide
Inrush Transient 0.4 A
2
Sec.
Shutdown Mode (Off, UV, OT) 5 mA
Output in Short Circuit 100 mA
No Load 80 mA
Low Line (Vin=Vmin, Vout=Vnom) 10.2 A. (OKX-T/16-D12),
6.34A (OKX-T/10-D12)
Remote On/Off Control (Note 5)
Negative Logic (“N” model suffi x) ON = Open pin or ground to +0.3V. max.
OFF =+2.5V min. to + Vin (max)
Positive Logic (“P” model suffi x) ON = Open pin (internally pulled up) to
+Vin max.
OFF = Ground pin to +0.3V. max.
Current 1 mA max.
Tracking/Sequencing (OKX “2” models)
Slew Rate 2 Volts per millisecond, max.
Tracking accuracy, rising input Vout = +/-100 mV of Sequence In
Tracking accuracy, falling input Vout = +/-200 mV of Sequence In
General and Safety
Effi ciency See Ordering Guide
Switching Frequency 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 mHRS (OKX2-T/16-D12P)
Calculated MTBF per MIL-HDBK-217F (4b) 5.3 mHRS
(OKX2-T/16-D12P)
Output
Output Voltage Range See Ordering Guide
Minimum Loading No minimum load
Accuracy (50% load, untrimmed) ±2 % of Vnominal
Voltage Output Range (Note 13) See Ordering Guide
Overvoltage Protection (Note 16) None
Temperature Coeffi cient ±0.02% per oC of Vout range
Ripple/Noise (20 MHz bandwidth) See Ordering Guide and note 8
Line/Load Regulation See Ordering Guide and note 10
Maximum Capacitive Loading (Note 14)
Cap-ESR=0.001 to 0.01 Ohms 1,000 F
Cap-ESR >0.01 Ohms 5,000 F
Current Limit Inception (Note 6) 30 Amps (OKX2-T/16-D12)
(98% of Vout setting, after warm up) 25 Amps (OKX2-T/10-D12)
Short Circuit Mode
Short Circuit Current Output 2 A
Protection Method Hiccup autorecovery upon overload
removal. (Note 7)
Short Circuit Duration Continuous, no damage
(output shorted to ground)
Prebias Startup Converter will start up if the external
output voltage is less than Vset
Dynamic Load Response 75 Sec max. to within ±2% of fi nal value
(50-100% load step, di/dt=2.5A/Sec)
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 See Mechanical Specifi cations
Weight 0.2 ounces (5.6 grams)
Electromagnetic Interference Designed to meet FCC part 15, class B,
EN55022 and CISPR22 class B conducted
and radiated (may need external fi lter)
Restriction of Hazardous Substances RoHS-6
(does not claim EU RoHS
exemption 7b–lead in solder)
Absolute Maximum Ratings
Input Voltage (Continuous or transient) 0 V.to +15 Volts max. (D12 models)
On/Off Control 0 V. min. to +Vin max.
Input Reverse Polarity Protection See Fuse section
Output Current (Note 7) Current-limited. Devices can withstand a
sustained short circuit without damage.
The outputs are not intended to accept
appreciable reverse current.
Storage Temperature -55 to +125 deg. C.
Lead Temperature See soldering specifi cations
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 Specifi cations Table is
not implied nor recommended.
Specifi cation 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 F paralleled with 10 F ceramic/tantalum 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 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 100 F tantalum, 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 airflow, 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, 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.
(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected
setting.
OKX T/10 & T/16-D12 Series
Adjustable DOSA 10/16-Amp SIP DC/DC Converters
MDC_OKX2_T10T16.B06 Page 3 of 16
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