UNR SERIES www.murata-ps.com Single Output, Non-Isolated, 5V-to-2.5V 12 Amp, DC/DC Converters Features As supply voltages trend lower and load currents increase, centralized power becomes more impractical. The tight accuracy, low noise and quick transient response demanded by today’s low-voltage CPU’s, ASIC’s and DSP’s make power processing at the "point of use" the only viable solution. As voltages decrease much below 3.3V, the task of designing your own circuit to efficiently derive low-voltage power from higher-voltage buses (5V, 12V, 48V, etc.) becomes significantly more challenging. When you are designing power-hungry 2.5V partitions or boards, consider Murata Power Solutions’ new UNR-2.5/12-D5. This non-isolated, 5V-to-2.5V DC/ DC delivers a full 12 Amps at an impressive 87% efficiency. Packaged in a 1" x 2" x 0.44" metal case, the converter exploits synchronous rectification, planar magnetics and 100% automatic SMT assembly to bring you an incomparable 30 Watts of 2.5V power. The UNR-2.5/12-D5 delivers full power over the –40 to +50°C temperature range without heat sinking or forced-air cooling. It is fully line (±0.1%) and load (±0.5%) regulated and features low noise (40mVp-p) and quick (30µsec) transient response. The unit offers remote on/off control, and it can withstand a sustained output short circuit with full recovery to rated accuracy. Designing your own 2.5V step-down buck regulator may be practical for lowpower applications. When you need 12 Amps, the task becomes significantly more time consuming. Consider that the high efficiency, ease-of-use, and overall cost effectiveness of Murata Power Solutions’ new 2.5V UNR Series make the quick solution the best solution. OBSOLETE PRODUCT ■ Low cost! ■ +4.75V to +5.5V input ■ +2.5V (±25mV), 12 Amp output ■ 200kHz, synchronous-rectifier topology ■ High efficiency, 87% ■ Low output noise, 40mVp-p ■ Quick transient response, 30µsec ■ –40 to +50°C operation with no derating ■ Highly reliable, 100% SMT construction ■ Remote on/off control ■ Output short-circuit protection ■ 1" x 2" metal package; EMC compliant ■ IEC950/EN60950/UL1950 pending ■ Modifications and customs for OEM’s Last time buy: 3 March 2014 Click here for more information. +VIN +VOUT INPUT RETURN OUTPUT RETURN LOGIC GROUND OVERCURRENT DETECTION ON/OFF CONTROL PWM CONTROLLER REFERENCE & ERROR AMP Signals applied to the On/Off Control are referenced to Logic Ground which is internally connected to Input/Output Return. The Logic Ground pin is not designed to carry heavy current. Do not install units with the Return pins open or connected via high-impedance runs. Figure 1. Simplified Schematic For full details go to www.murata-ps.com/rohs www.murata-ps.com/support UNR30-40W.C01 Page 1 of 4 UNR SERIES Single Output, Non-Isolated, 5V-to-2.5V 12 Amp, DC/DC Converters Performance/Functional Specifications Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted. ➀ ➁ Absolute Maximum Ratings Input Input Voltage Range 4.75-5.5 Volts (5V nominal) Input Current ➂ 0.15/6.9 Amps Input Filter Type Input Voltage 7 Volts Capacitive Output Current withstand a sustained output short Current limited. Devices can circuit without damage. Overvoltage Protection None Storage Temperature –40 to +105°C Reverse-Polarity Protection None Lead Temperature (soldering, 10 sec.) +300°C On/Off Control (Pin 2) ➃ TTL high (or open) = on, low = off These are stress ratings. Exposure of devices to 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. Output VOUT Accuracy (50% load) ±1% (±25mV) maximum Temperature Coefficient ±0.02% per °C Ripple/Noise (20MHz BW) ➄ 40mVp-p typical, 80mVp-p maximum Line/Load Regulation ±0.1% maximum/±0.5% maximum Efficiency 87% typical, 84% minimum Overcurrent Detection Point ➅ Auto-recovery On/Off Control Functionality The On/Off Control pin has an internal 5k pull-up resistor to +VIN. It can be driven with any logic circuit capable of meeting the following drive requirements. Logic "0" = 0 to +0.8V. Logic "1" = +2.0V to +VIN. IIH (@VIN = +2.0V) = –0.7mA. IIL (@VIN = 0V) = –1.1mA. Open collector logic or a single NPN drive transistor can be used. The drive circuit should be rated for more than 5.5V. Applying a voltage to pin 2 when no input power is applied to the converter can cause permanent damage to the converter. Dynamic Characteristics Transient Response (50% load step) 30µsec to ±1% of final value Switching Frequency 200kHz (±20kHz) Environmental Operating Temperature (Ambient): Without Derating With Derating –40 to +50°C to +100°C (Straight line to 0 Watts) Storage Temperature –40 to +105°C MECHANICAL SPECIFICATIONS 2.00 (50.80) Physical Dimensions 2" x 1" x 0.44" (51 x 25 x 11.2mm) Shielding 5-sided Case Connection Pin 5 (Input Return) Case Material Corrosion resistant steel with non-conductive, epoxy-based, black enamel finish and plastic baseplate Pin Material Tin over copper alloy Weight 1.6 ounces (45.4 grams) 0.44 (11.18) METAL CASE Case C5B INSULATED BASE PINS 1-2: 0.040 ±0.002 (1.016 ±0.051) PINS 3-6: 0.062 ±0.002 (1.575 ±0.051) 0.20 MIN (5.08) 1.800 (45.72) 0.300 (7.62) 1 0.10 (2.54) 3 2 0.800 (20.32) 1.00 (25.40) 4 0.400 (10.16) 5 ➀ These devices have no minimum load requirements and will regulate under no-load conditions. ➁ Achieving specified performance requires the installation of an external 470µF input capacitor with an ESR of 20m and an rms ripple current rating of 6 Amps, as well as an external 22µF output capacitor with an ESR of 200m or less. ➂ No-load/full-load conditions. When the unit is off, the input "standby" current is typically 10mA. ➃ See On/Off Control Functionality. ➄ Output noise may be reduced by installing additional external capacitors across the output terminals. Caps should be selected for low ESR (typically 60mW) and located as close to the unit as possible. ➅ Overcurrent detection initiates at approximately 30% above rated load, where the output current "hiccups" at an overage current of 1A and remains there until the short is removed. 6 BOTTOM VIEW 0.10 (2.54) DIMENSIONS ARE IN INCHES (MM) 0.200 (5.08) I/O Connections Pin 1 2 3 4 5 6 Function P9 Logic Ground On/Off Control +Output Output Return Input Return +Input Note: The case is connected to pin 5 (Input Return). O R D E R I N G I N F O R M AT I O N UNR-2.5/12-D5 Non-Isolated, 5V-to-2.5V, 30 Watt, DC/DC Converter, non-RoHS. www.murata-ps.com/support 2 UNR30-40W.C01 Page 2 of 4 UNR SERIES Single Output, Non-Isolated, 5V-to-2.5V 12 Amp, DC/DC Converters Features ■ Low cost! ■ +4.75V to +5.5V input ■ +3.3V (±33mV), 12 Amp output ■ 200kHz, synchronous-rectifier topology ■ High efficiency, 90% ■ Low output noise, 40mVp-p ■ Quick transient response, 30µsec ■ –40 to +50°C operation with no derating ■ Highly reliable, 100% SMT construction ■ Remote on/off control ■ Output short-circuit protection ■ 1" x 2" metal package; EMC compliant ■ IEC950/EN60950/UL1950 pending ■ Modifications and customs for OEM’st As 3.3V CPU’s, DSP’s and PLD’s proliferate and low-voltage currents increase, the shortcomings of both traditional centralized power architectures and the recently introduced 3.3V outputs on AC/DC converters become more apparent. The solution is to locally derive 3.3V power from buses of higher voltage (5V, 12V, 48V, etc.). "Point-of-use" power processing is the only way to guarantee the tight accuracy, low noise, and quick transient response required by these new devices. If you are designing power-hungry 3.3V partitions or boards, consider Murata Power Solutions’ new UNR-3.3/12-D5. These non-isolated, 5V-to-3.3V DC/DC’s deliver up to 12 Amps. Packaged in 1" x 2" x 0.44" metal cases, these converters use synchronous rectification, planar magnetics, and 100% automatic SMT assembly to bring you the most cost-effective 3.3V power. The 90% efficient UNR-3.3/12-D5 delivers its full 40W output power from –40 to +50°C without heat sinking or forced-air cooling. It is fully line (±0.1% max.) and load (±0.5% max.) regulated and features a TTL-compatible on/off control. These devices can withstand a sustained output short circuit and automatically recover to rated accuracy. Designing your own 3.3V step-down buck regulator may be practical for lowpower applications. When you need 12 Amps, the task becomes significantly more challenging and time consuming. It’s time to consider the high efficiency, ease-ofuse, and overall cost effectiveness of Murata Power Solutions' UNR Series. Safety agency approvals and full EMI characterizations are currently in progress. +VIN +VOUT INPUT RETURN LOGIC GROUND OUTPUT RETURN VOLTAGE BOOST OVERCURRENT DETECTION +VCC ON/OFF CONTROL Signals applied to the On/Off Control are referenced to Logic Ground which is internally connected to Input/Output Return. The Logic Ground pin is not designed to carry heavy current. Do not install units with the Return pins open or connected via high-impedance runs. PWM CONTROLLER REFERENCE & ERROR AMP VOUT TRIM Figure 2. Simplified Schematic www.murata-ps.com/support UNR30-40W.C01 Page 3 of 4 UNR SERIES Single Output, Non-Isolated, 5V-to-2.5V 12 Amp, DC/DC Converters Performance/Functional Specifications Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted. ➀ ➁ Input Input Voltage Range 4.75-5.5 Volts (5V nominal) Input Current ➂ 0.15/8.8 Amps Input Filter Type Capacitive Overvoltage Protection None Absolute Maximum Ratings Input Voltage 7 Volts Output Current Current limited. Devices can withstand a sustained output short circuit without damage. Reverse-Polarity Protection None Storage Temperature –40 to +105°C On/Off Control (Pin 2) ➃ TTL high (or open) = on, low = off Lead Temperature (soldering, 10 sec.) +300°C Output VOUT Accuracy (50% load) ±1% (±33mV) maximum Temperature Coefficient ±0.02% per °C Ripple/Noise (20MHz BW) ➄ 40mVp-p typical, 80mVp-p maximum Line/Load Regulation ±0.1% maximum/±0.5% maximum Efficiency 90% typical, 87% minimum Overcurrent Detection Point ➅ Auto-recovery Dynamic Characteristics Transient Response (50% load step) 30µsec to ±1% of final value Switching Frequency 200kHz (±20kHz) Environmental These are stress ratings. Exposure of devices to 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. On/Off Control Functionality The On/Off Control pin has an internal 5k pull-up resistor to +VIN. It can be driven with any logic circuit capable of meeting the following drive requirements. Logic "0" = 0 to +0.8V. Logic "1" = +2.0V to +VIN. IIH (@VIN = +2.0V) = –0.7mA. IIL (@VIN = 0V) = –1.1mA. Open collector logic or a single NPN drive transistor can be used. The drive circuit should be rated for more than 5.5V. Applying a voltage to pin 2 when no input power is applied to the converter can cause permanent damage to the converter. MECHANICAL SPECIFICATIONS 2.00 (50.80) Operating Temperature (Ambient): Without Derating With Derating –40 to +50°C to +100°C (Straight line to 0 Watts) Storage Temperature –40 to +105°C METAL CASE Case C5B 0.44 (11.18) INSULATED BASE Physical Dimensions 2" x 1" x 0.44" (51 x 25 x 11.2mm) Shielding 5-sided Case Connection Pin 5 (Input Return) Case Material Corrosion resistant steel with non-conductive, epoxy-based, black enamel finish and plastic baseplate Pin Material Weight PINS 1-2: 0.040 ±0.002 (1.016 ±0.051) PINS 3-6: 0.062 ±0.002 (1.575 ±0.051) 0.20 MIN (5.08) 1.800 (45.72) 1 0.300 (7.62) ISO 9001 and 14001 REGISTERED 1.00 (25.40) 4 0.400 (10.16) 5 6 BOTTOM VIEW 0.10 (2.54) DIMENSIONS ARE IN INCHES (MM) 0.200 (5.08) I/O Connections 1.6 ounces (45.4 grams) Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. 3 2 0.800 (20.32) RoHS: Gold-plate over copper alloy Non-RoHS: Tin over copper alloy ➀ These devices have no minimum load requirements and will regulate under no-load conditions. ➁ Achieving specified performance requires the installation of an external 470µF input capacitor with an ESR of 20m and an rms ripple current rating of 6 Amps, as well as an external 22µF output capacitor with an ESR of 200m or less. ➂ No-load/full-load conditions. When the unit is off, the input "standby" current is typically 10mA. ➃ See On/Off Control Functionality. ➄ Output noise may be reduced by installing additional external capacitors across the output terminals. Caps should be selected for low ESR (typically 60m) and located as close to the unit as possible. ➅ Overcurrent detection initiates at approximately 30% above rated load, where the output current "hiccups" at an overage current of 1A and remains there until the short is removed. 0.10 (2.54) Pin 1 2 3 4 5 6 Function P9 Logic Ground On/Off Control +Output Output Return Input Return +Input Note: The case is connected to pin 5 (Input Return). O R D E R I N G I N F O R M AT I O N UNR-3.3/12-D5 UNR-3.3/12-D5-C Non-Isolated, 5V-to-3.3V, 40 Watt, DC/DC Converter, non-RoHS version RoHS version This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: http://www.murata-ps.com/requirements/ Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. © 2013 Murata Power Solutions, Inc. www.murata-ps.com/support UNR30-40W.C01 Page 4 of 4