UNR-1.8/2-D12SM データシートの表示（PDF） - Murata Power Solutions

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UNR-1.8/2-D12SM

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Murata Power Solutions 

UNR Series

Single Output, Non-Isolated, 1.8/2.5/3.3VOUT 3.6-10W DC/DC Converters

Performance/Functional Specifications

Typical @ TA = +25°C under nominal line voltage and full-load conditions with no external filtering.

Specifications apply to both surface-mount and through-hole models, unless noted. ➀ ➆

Input

Input Voltage Range:

D5 Models

D12 Models

4.75-5.5 Volts (5V nominal)

10.8-13.6 Volts (12V nominal)

Overvoltage Shutdown

None

Start-Up Threshold:

D12 Models ➁

10.2V typical, 10.8V maximum

Undervoltage Shutdown:

D12 Models ➁

9.6V typical, 8.2V minimum

Input Current:

Normal Operating Conditions

Standby Mode (Off or undervoltage):

1.8VOUT

2.5VOUT, 3.3VOUT D5 Models

3.3VOUT D12 Models

Output Short-Circuit Condition

See Ordering Guide

20mA typical, 30mA maximum

11mA typical, 20mA maximum

5mA typical, 10mA maximum

50mArms

Input Ripple Current:

1.8VOUT, 3.3VOUT D12 Models

2.5VOUT, 3.3VOUT D5 Models

50mAp-p

150mAp-p

Input Filter Type

Capacitive

Reverse-Polarity Protection

None, install external fuse

On/Off Control ➂

TTL high (or open) = on, low = off

1.5V typical logic threshold

VOUT Accuracy (50% load):

1.8VOUT Models

2.5VOUT Models

3.3VOUT D5 Models

3.3VOUT D12 Models

Temperature Coefficient

Ripple/Noise (20MHz BW) ➃

Line/Load Regulation

Efficiency

Current Limiting ➄

Output

±1.75% (±32mV) maximum

±1.75% (±44mV) maximum

±1.5% (±50mV) maximum

±1% (±33mV) maximum

±0.02% per °C

See Ordering Guide

See Ordering Guide

See Ordering Guide

Auto-recovery

Dynamic Characteristics

Transient Response (50% load step):

1.8VOUT Models

2.5VOUT, 3.3VOUT D12 Models

3.3VOUT D5 Models

20µsec to ±1% of final value

30µsec to ±1% of final value

40µsec to ±1% of final value

Start-Up Time: ➅ ➆

VIN to VOUT: D5 Models

D12 Models

On/Off to VOUT: D5 Models

D12 Models

100msec typical, 120msec maximum

13msec typical, 20msec maximum

60msec typical, 120msec maximum

13msec typical, 20msec maximum

Switching Frequency

200kHz (±30kHz)

Environmental

Operating Temperature (Ambient):

Without Derating

With Derating

–40 to +65/70°C

to +100°C (See Derating Curves)

Storage Temperature

–40 to +105°C

Flammability

UL 94V-0

Physical

Dimensions:

Surface Mount Package

Through Hole Package

.

1.01"x1.01"x0.49" (25.65x25.65x12.45mm) nom.

1.00"x1.00"x0.45" (25.40x25.40x11.43mm) nom.

Shielding:

Surface Mount Package

Through Hole Package

5-sided

None

Case Connection (Surface Mount)

Input/output return

Case Material:

Surface Mount Package

Through Hole Package

Corrosion-resistant steel with

non-conductive, epoxy-based, black

enamel finish and plastic baseplate

Diallyl phthalate, UL94V-0 rated

Pin or Lead Material:

Surface Mount

Through Hole

Tin plate over copper alloy

Gold plate over copper alloy

Weight

0.6 ounces (17 grams)

➀ D5 models require a minimum 300mA load current to maintain specified regulation. D12

models have no minimum load requirement. Operating D5 models under no-load conditions

will not damage these devices, however they may not meet all listed specifications. The UNR-

1.8/2-D5 and D5SM require an external 15 pull-up resistor between +Input and On/Off

Control for normal operation. See On/Off Control for details. The UNR-3.3/3-D12 and D12SM

are specifiied with an external 22µF input capacitor. See I/O Filtering for details.

➁ See Startup Threshold and Undervoltage Shutdown for details.

➂ See On/Off Control for details.

➃ The 22µF external input capacitor required for the UNR-3.3/3-D12 and D12SM should be

minimally rated for 1.5Arms ripple current and 125m ESR. Output noise for all models can

be further reduced with the installation of external output capacitors. See I/O Filtering for

details.

➄ Current limiting initiates at approximately 30% above rated load. Under short-circuit

conditions, output current folds back to approximately 150mA and input current drops to

approximtely 50mA. Both remain at those levels until the short is removed.

➅ See Start-Up Time for details.

➆ D5/D5SM models may experience start-up problems if voltages greater than 1.0V (for 3.3V

models) or 1.2V (for 1.8/2.5V models) are present across the output pins during power-up.

Absolute Maximum Ratings

Input Voltage:

Continuous:

D5 Models

D12 Models

Transient (100msec):

D5 Models

D12 Models

Input Reverse-Polarity Protection

Output Overvoltage Protection

Output Current

Storage Temperature

Lead Temperature

Selective soldering (10 sec.)

Reflow soldering (75 sec.)

7 Volts

15 Volts

15 Volts

24 Volts

None, install external fuse

None

Current limited. Devices can

withstand a sustained output

short circuit without damage.

–40 to +105°C

+300°C

+230°C

These are stress ratings. Exposure of devices to greater than 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.

www.murata-ps.com/support

MDC_UNR 3.6-10W.C01 Page 4 of 8

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