UNR-1.8/2-D5SM-C Murata Power Solutions Inc, UNR-1.8/2-D5SM-C Datasheet - Page 4

• Manufacturer Part Number: UNR-1.8/2-D5SM-C
• Description: DC/DC SM 2A 5-1.8V Non-Iso
• Manufacturer: Murata Power Solutions Inc
• Series: UNRr

Specifications of UNR-1.8/2-D5SM-C

• Product: Non-Isolated / POL
• Output Power: 4 W
• Input Voltage Range: 4.75 V to 5.5 V
• Number Of Outputs: 1
• Output Voltage (channel 1): 1.8 V
• Output Current (channel 1): 2 A
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Performance/Functional Specifi cations
Typical @ T
Specifi cations apply to both surface-mount and through-hole models, unless noted.
Input Voltage Range:
Overvoltage Shutdown
Start-Up Threshold:
Undervoltage Shutdown:
Input Current:
Input Ripple Current:
Input Filter Type
Reverse-Polarity Protection
On/Off Control ➂
V
Temperature Coeffi cient
Ripple/Noise (20MHz BW) ➃
Line/Load Regulation
Effi ciency
Current Limiting ➄
Transient Response (50% load step):
Start-Up Time: ➅ ➆
Switching Frequency
Operating Temperature (Ambient):
Storage Temperature
Flammability
OUT
D5 Models
D12 Models
D12 Models ➁
D12 Models ➁
Normal Operating Conditions
Standby Mode (Off or undervoltage):
Output Short-Circuit Condition
1.8V
2.5V
1.8V
2.5V
3.3V
3.3V
1.8V
2.5V
3.3V
V
On/Off to V
Without Derating
With Derating
IN
1.8V
2.5V
3.3V
Accuracy (50% load):
to V
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
A
OUT
OUT
OUT
OUT
= +25°C under nominal line voltage and full-load conditions with no external fi ltering.
, 3.3V
, 3.3V
, 3.3V
Models
Models
D5 Models
D12 Models
Models
D5 Models
: D5 Models
, 3.3V
OUT
D12 Models
D12 Models
OUT
OUT
OUT
: D5 Models
OUT
D12 Models
D12 Models
D12 Models
D5 Models
D5 Models
Dynamic Characteristics
Environmental
Output
Input
4.75-5.5 Volts (5V nominal)
10.8-13.6 Volts (12V nominal)
None
10.2V typical, 10.8V maximum
9.6V typical, 8.2V minimum
See Ordering Guide
20mA typical, 30mA maximum
11mA typical, 20mA maximum
5mA typical, 10mA maximum
50mArms
50mAp-p
150mAp-p
Capacitive
None, install external fuse
TTL high (or open) = on, low = off
1.5V typical logic threshold
±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
20μsec to ±1% of fi nal value
30μsec to ±1% of fi nal value
40μsec to ±1% of fi nal value
100msec typical, 120msec maximum
13msec typical, 20msec maximum
60msec typical, 120msec maximum
13msec typical, 20msec maximum
200kHz (±30kHz)
–40 to +65/70°C
to +100°C (See Derating Curves)
–40 to +105°C
UL 94V-0
www.murata-ps.com
➀ ➆
Single Output, Non-Isolated, 1.8/2.5/3.3V
➀ D5 models require a minimum 300mA load current to maintain specifi ed regulation. D12
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
➄ Current limiting initiates at approximately 30% above rated load. Under short-circuit
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
Dimensions:
Shielding:
Case Connection (Surface Mount)
Case Material:
Pin Material:
Weight
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 Specifi cations Table is not implied.
Input Voltage:
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
Storage Temperature
Lead Temperature
Surface Mount Package
Through Hole Package
Surface Mount Package
Through Hole Package
Surface Mount Package
Through Hole Package
RoHS:
Non-RoHS
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 specifi cations. 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 specifi ied with an external 22μF input capacitor. See I/O Filtering for details.
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.
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.
models) or 1.2V (for 1.8/2.5V models) are present across the output pins during power-up.
Continuous:
Transient (100msec):
Selective soldering (10 sec.)
Refl ow soldering (75 sec.)
D5 Models
D12 Models
D5 Models
D12 Models
Absolute Maximum Ratings
Physical
04 Nov 2010 MDC_UNR 3.6-10W_B02 Page 4 of 8
.
1.01"x1.01"x0.49" (25.65x25.65x12.45mm) nom.
1.00"x1.00"x0.45" (25.40x25.40x11.43mm) nom.
5-sided
None
Input/output return
Corrosion-resistant steel with
non-conductive, epoxy-based, black
enamel fi nish and plastic baseplate
Diallyl phthalate, UL94V-0 rated
Gold plate over copper alloy
Tin over copper alloy
0.6 ounces (17 grams)
OUT
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
3.6-10W DC/DC Converters
email: [e-mail]
UNR Series