Performance and Functional Specifications

See Note 1

Input

Input Voltage Range

See Ordering Guide.

Isolation

Not isolated

Start-Up Voltage

18.4 V

Undervoltage Shutdown (see Note 15)

17 V min., 18.7V max.

Overvoltage Shutdown

None

Reflected (Back) Ripple Current (Note 2)

20 mA pk-pk

Internal Input Filter Type

Capacitive

Recommended External Fuse

5A fast blow

Reverse Polarity Protection

None. Please 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)

2.0A. (Vout = 15V)

Remote On/Off Control (Note 5)

Negative Logic (“N” model suffix)

ON = -0.3V to +1.2V

OFF = (Vin -2.5V) to 40V or open

Current

1 mA max.

Positive Logic (“P” model suffix)

ON = Open pin (internally pulled up) or

= (Vin -2.5V) to 40V or open

OFF = -0.3V to +1.2V

Current

1 mA max.

Output

Output Power

36W max.

Minimum Loading

No minimum load

Accuracy (50% load, untrimmed)

±2 % of Vset

Voltage Output Range (Note 13)

See Ordering Guide

Overvoltage Protection (Note 16)

None

Temperature Coefficient

±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

Efficiency

See Ordering Guide

Maximum Capacitive Loading (Note 14)

Cap-ESR=0.001 to 0.01 Ohms

1,000 μF

Cap-ESR >0.01 Ohms

3,000 μF (min. cap. load 0 μF)

Current Limit Inception (Note 6)

(98% of Vout setting, after warm up)

4.5 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

TBDμSec max. to within ±2% of final value

(50-100 load step, di/dt=1A/μSec, 5 Vout, Cout = 1&10

μF ceramic)

Start-Up Time

8 mSec for Vout=nominal (Vin On)

(Vin on or On/Off to Vout regulated)

8 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 Specifications

Weight

0.072 ounces (2.04 grams)

Safety

Designed to meet UL/cUL 60950-1, CSA-

C22.2 No. 60950-1, IEC/EN 60950-1

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 +40 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 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 °C, Vin=nominal (+24V.), Vout=nominal (+12V), full load, external caps and

natural convection unless otherwise indicated. Extended tests at full power must supply substantial forced

airflow.

All models are tested and specified with external 1 μF paralleled with 10μF 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)

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.

(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, ground fixed

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.

OKI-T/36W-W40 Series

Selectable Output 36-Watt DOSA-SMT DC/DC Converters

www.murata-ps.com

email: sales@murata-ps.com

09 Feb 2011

MDC_OKI-T/36W-W40.A01 Page 4 of 12