Details, datasheet, quote on part number: UNR-5/5-D12
CategoryPower Management => DC-DC Converters
DescriptionDC/DC Power Converters
CompanyDatel, Inc.
DatasheetDownload UNR-5/5-D12 datasheet
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Features, Applications


No external I/O filtering required to +13.6V input (±50mV), 5 Amp output Synchronous-rectifier topology 300kHz switching frequency Low output noise, 60mVp-p Quick transient response, 30µsec High efficiency, to +70°C operation with no derating On/off control; Undervoltage shutdown Output trim capability x 2" metal package; EMC compliant IEC950/EN60950/UL1950 pending Modifications and customs for OEM's

When you're faced with upgrading your system's +5V power supply because your new, high-speed, 5V electronics simply demand too much current, consider tapping into your +12V line with one of DATEL's new, low-cost, 12V-to-5V DC/DC converters. These non-isolated buck regulators deliver to 5 Amps of clean (60mVp-p noise), rapidly responding (30µsec step response) 5V current. They are housed in standard x 2" metal packages and require absolutely no external filtering to achieve specified performance. The UNR-5/5-D12 achieves its high power density (25W/in3) through circuit topology and packaging. Its 91% efficient, fixed-frequency (300kHz), synchronousrectifier design is packaged, with thermally conductive potting compound, in a heatradiating, black metal case. It achieves low cost and high reliability through its use of proven, fully automated, SMT-on-pcb assembly techniques. Consequently, every 1 Amp of 12V current gives you 2.2 Amps of additional 5V current at an incremental cost. The impressively efficient UNR-5/5-D12 delivers it full rated 25W output power over the to +70°C ambient temperature range without heat sinking or forced-air cooling. Units derate to +100°C ambient. Devices are fully line (±0.25% max.) and load (±0.5% max.) regulated and feature user-optional remote on/off control and output-voltage trim capabilities (from to 6 Volts). If you need more 5V current and you've already rejected the use of inefficient, step-down, linear regulators, take a look at one of DATEL's "switchers." Their high efficiency and ease of use may surprise you. Safety agency approvals and full EMI/EMC characterization tests are currently in progress.

DATEL, Inc., Mansfield, MA 02048 (USA) Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 Email: Internet:

Typical = +25°C under nominal line voltage and full-load conditions, with no external I/O filtering, unless noted.

Input Voltage Output Current 15 Volts Current limited. Devices can withstand a sustained output short circuit without damage. +105°C +300°C

Input Voltage Range Input Current Input Filter Type Overvoltage Protection Reverse-Polarity Protection Start-Up Threshold Undervoltage Shutdown On/Off Control (Pin 3) VOUT Accuracy (50% load) Temperature Coefficient Ripple/Noise (20MHz BW) Line/Load Regulation Efficiency Current Limiting Transient Response (50% load step) Switching Frequency Operating Temperature (Ambient): Without Derating With Derating Storage Temperature Dimensions Shielding Case Connection Case Material 10.8-13.6 Volts (12V nominal) 40/2290mA Capacitive None 10.2V typical, 10.4V maximum 9.6V typical, 8.2V minimum TTL high (or open) = on, low = off

Storage Temperature Lead Temperature (soldering, 10 sec.)

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.

The On/Off Control pin has an internal 10k pull-up resistor to +VIN. It can be driven with any logic circuit capable of meeting the following drive requirements. Logic to +0.8V. Logic +2.0V to +VIN. IIH (@VIN = ­1.2mA. IIL (@VIN = ­1.4mA. Open collector logic or a single NPN drive transistor can be used. The drive circuit should be rated for more than 13.6V. Applying a voltage to pin 3 when no input power is applied to the converter can cause permanent damage to the converter.

±1% (±50mV) maximum ±0.02% per °C 60mVp-p typical, 85mVp-p maximum ±0.25% maximum/±0.5% maximum 91% typical, 87% minimum Auto-recovery

5-sided Pin 2 (Input Return) Corrosion resistant steel with non-conductive, epoxy-based, black enamel finish and plastic baseplate Brass, solder coated 1.6 ounces (45.4 grams)

Pin Function P21 +Input Input Return On/Off Control +Output Output Return Trim

These devices have no minimum load requirements and will regulate under no-load conditions. No-load/full-load conditions. When the unit is off, the input "standby" current is typically 10mA. Upon start-up, devices will not regulate properly until the input voltage reaches approximately +10.2V. If the input subsequently drops below +9.6V, devices will turn off. Restart requires bringing the input back to +10.2V. See On/Off Control Functionality. Output noise may be reduced by installing external capacitors across the output terminals. Caps should be selected for low ESR (typ. 60m) and located as close to the unit as possible. Current limiting initiates at approximately 30% above rated load. Under short-circuit conditions, output current folds back to approximately 200mA and remains there until the short is removed.

Non-Isolated, 12V-to-5V, 25 Watt, DC/DC Converter Non-Isolated, 12V-to-5V, 40 Watt, DC/DC Converter Non-Isolated, 12V-to-5V, 50 Watt, DC/DC Converter

DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 Tel: Fax: (508) 339-6356 Internet: Email: Data Sheet Fax Back: (508) 261-2857

DATEL (UK) LTD. Tadley, England Tel: (01256)-880444 DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01 DATEL GmbH München, Germany Tel: 89-544334-0 DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-6354-2025

DATEL 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. The DATEL logo is a registered DATEL, Inc. trademark.


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