Datasheet

Performance and Functional Specifi cations
See Note 1
Input
Input Voltage Range See Ordering Guide and Note 7.
Isolation Not isolated
Start-Up Voltage 8.2 V
Undervoltage Shutdown (see Note 15) 7.5 V min., 8.5 V max.
Overvoltage Shutdown None
Refl ected (Back) Ripple Current (Note 2) 20 mA pk-pk
Internal Input Filter Type Capacitive
Recommended External Fuse 1.2A fast blow
Reverse Polarity Protection None. Install external fuse.
Input Current:
Full Load Conditions See Ordering Guide
Inrush Transient 0.4 A2Sec.
Shutdown Mode (Off, UV, OT) 5 mA
Output in Short Circuit 60 mA
Low Line (Vin=Vmin) 1.63A.
Remote On/Off Control (Note 5)
Negative Logic (“N” model suffi x) ON = -0.3V to +1.2V
OFF = (Vin -2.5V) to 32V or open
Current 1 mA max.
Positive Logic (“P” model suffi x) ON = Open pin (internally pulled up) or
= (Vin -2.5V) to 32V or open
OFF = -0.3V to +1.2V
Current 1 mA max.
Output
Output Power 13.77W max.
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 °C of Vout range
Ripple/Noise (20 MHz bandwidth) See Ordering Guide and note 8
Line/Load Regulation See Ordering Guide and note 10
Effi ciency See Ordering Guide
Maximum Capacitive Loading (Note 14)
Cap-ESR=0.001 to 0.01 Ohms 1,000 F
Cap-ESR >0.01 Ohms 3,000

F (min. cap. load
0 F
)
Current Limit Inception (Note 6)
(98% of Vout setting, after warm up) 5.5 Amps
Short Circuit Mode
Short Circuit Current Output 0.0 A
Protection Method Hiccup autorecovery upon overload
removal. (Note 17)
Short Circuit Duration Continuous, no damage
(output shorted to ground)
Prebias Startup Converter will start up if the external
output voltage is less than Vnominal.
Dynamic Characteristics
Dynamic Load Response 150Sec nom. to within 2% of Vout set
(50-100 load step, di/dt=1A/Sec, 3.3 Vout, Cout = 1&10F ceramic)
Start-Up Time 8 mSec for Vout=nominal (Vin On)
(Vin on or On/Off to Vout regulated)
6 mSec for Vout=nominal (Remote On/Off)
Switching Frequency 300 KHz
Environmental
Calculated MTBF
Telecordia method (4a)
TBD
Calculated MTBF
MIL-HDBK-217N2 method (4b) TBD
Operating Temperature Range (Ambient)
See derating curves -40 to +85 ˚C. with derating (Note 9)
Operating PC Board Temperature -40 to +100 ˚Celsius max., no derating (12)
Storage Temperature Range -55 to +125 deg. C.
Thermal Protection/Shutdown +130 ˚Celsius
Relative Humidity to 85%/+85 ˚C., non-condensing
Physical
Outline Dimensions See Mechanical Specifi cations
Weight 0.072 ounces (2.04 grams)
Safety Meets UL/cUL 60950-1, CSA-
C22.2 No. 60950-1, IEC/EN 60950-1,
2nd Edition
Restriction of Hazardous Substances
RoHS-6 (does not claim EU RoHS exemption
7b–lead in solder)
MSL Rating 2
Absolute Maximum Ratings
Input Voltage (Continuous or transient) 0 V.to +32 Volts max.
On/Off Control 0 V. min. to +Vin max.
Input Reverse Polarity Protection None. Install external fuse.
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 ˚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) Specifi cations are typical at +25 °C, Vin=nominal (+24V.), 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 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 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 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 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.
MDC_OKI-T/3-W32 Series.A07 Page 3 of 13
OKI-T/3-W32 Series
Adjustable Output 3-Amp DOSA-SMT DC/DC Converters
www.murata-ps.com/support