Features * Low profile 4.0mm * Low cost DC/DC Converter * Wide input range (5V - 36V) * Short circuit protection ROF-78E * Casellated connections Description The ROF-78E is a switching regulator with a wide input voltage range, high efficiency and a low profile, pin-less SMD package. Two low-ripple output voltages are available as standard: 3.3V or 5V with 500mA continuous output current rating over the full operating temperature range of -40C to +75C without derating. An enable connection allows power sequencing or very low standby consumption (3.5A) for battery powered applications. These modules can be SMD reflow soldered. The connection pads have corner half-vias to enable optical inspection of the joints after soldering. Non Isolated Power Module Selection Guide Part Number ROF-78E3.3-0.5SMD-R ROF-78E5.0-0.5SMD-R Input Voltage Range [VDC] 5 - 36 9 - 36 Output Voltage [VDC] 3.3 5.0 Output Current [mA] 500 500 Efficiency typ. [%] 73 - 84 79 - 87 Model Numbering ROF-78E__-__SMD-R Output Voltage Packaging (1) Output Current Notes: Note1: suffix -R for tape&reel packaging Ordering Examples: ROF-78E3.3-0.5SMD-R = 3.3Vout, 0.5A Output Current, SMD, tape and reel packaging www.recom-power.com REV.: 4/2019 I-1 ROF-78E DC/DC Converter Series Specifications (measured @ Ta= 25C, nom. Vin, full load and after warm-up unless otherwise stated) BASIC CHARACTERISTICS Parameter Input Voltage Range Condition Min. nom. Vin= 12VDC and 24VDC 5VDC Typ. Max. 36VDC 500mA Input Current 5mA Quiescent Current Minimum Load 10% (2) ON/OFF CTRL max. Vin= 5VDC Standby Current Open or >1.75VDC GND or <0.7VDC DC-DC ON DC-DC OFF 3.5A DC-DC OFF Internal Operating Frequency 6.5A 650kHz Output Ripple and Noise 20MHz BW 100mVp-p ROF-78E3.3-0.5SMD Ripple vs. Load 100 100 90 90 80 80 70 70 Ripple [mV] Efficiency [%] Efficiency vs. Load 60 50 40 30 10 0 0 10 20 30 60 50 40 30 5Vin 12Vin 24Vin 36Vin 20 5Vin 12Vin 24Vin 36Vin 20 10 40 50 60 70 80 90 0 100 0 10 20 30 Output Load [%] 40 50 60 70 80 90 100 Output Load [%] ROF-78E5.0-0.5SMD Ripple vs. Load 100 100 90 90 80 80 70 70 Ripple [mV] Efficiency [%] Efficiency vs. Load 60 50 40 30 10 0 0 10 20 30 50 40 20 10 40 50 60 70 80 90 100 0 0 10 20 30 40 50 60 70 80 90 100 Output Load [%] Output Load [%] www.recom-power.com 60 30 9Vin 12Vin 24Vin 36Vin 20 9Vin 12Vin 24Vin 36Vin REV.: 4/2019 I-2 ROF-78E DC/DC Converter Series Specifications (measured @ Ta= 25C, nom. Vin, full load and after warm-up unless otherwise stated) REGULATIONS Parameter Condition Value Output Accuracy 5.0% max. Line Regulation low line to high line 1.0% max. Load Regulation (2) 10% to 100% load 3.0% typ. Transient Response 100% to 50% load 100% to 10% load 100mV 200mV Notes: Note2: Operation below 10% load will not harm the converter, but specifications may not be met PROTECTIONS Parameter Condition Value Short Circuit Protection (SCP) automatic recovery Short Circuit Input Current 200mA max. Over Current Protection (OCP) +Vin Optional Diode Protection Circuit Optional Protection 1: Add a blocking diode to Vout if current can flow backwards into the output, as this can damage the converter when it is powered down. The diode can either be fitted across the device if the source is low impedance or fitted in series with the output (recommended). ROF-78Exx5.0SMD Optional Protection 2: out +Vin +Vin ROF-78Exx5.0SMD +Vout +Vin +Vout GND +Vin GND GND GND ENVIRONMENTAL ROF-78Exx5.0SMD +Vout +Vout= +Vout - Vsd forward GND GND +Vin +Vout GND GND +Vin ROF-78Exx5.0SMD +Vout GND +Vout= +Vout - Vsd forward GND Parameter Operating Temperature Range +Vin >950mA typ. Hiccup mode +V Condition GND Value GND graph) with derating @ free air convection (see Operating Humidity non-condensing MTBF according to MIL-HDBK-217F, G.B. -40C to +85C 5% - 95% RH max. +25C 3500 x 103 hours Derating Graph (@ free air convection) 100 90 Output Load [%] 80 70 60 50 40 30 20 10 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 75 85 Ambient Temperature [C] www.recom-power.com REV.: 4/2019 I-3 ROF-78E DC/DC Converter Series Specifications (measured @ Ta= 25C, nom. Vin, full load and after warm-up unless otherwise stated) SAFETY AND CERTIFICATIONS Certificate Type (Safety) Report / File Number Standard RoHs 2+ RoHS-2011/65/EU + AM-2015/863 EAC RU-AT.49.09571 EMC Compliance TP TC 004/2011 Condition Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement Standard / Criterion with external filter EN55032, Class B EMC Filtering Suggestion according to EN55032 Class A and Class B Component List Class A and B L1 +Vin +Vin C1 ROF-78Exx-0.5SMD +Vout +Vout GND C2 C1 C2 L1 1F 1F 33H The capacitors used are ceramic capacitors, rated voltage 50V GND GND DIMENSION AND PHYSICAL CHARACTERISTICS Parameter Type Value Material PCB FR4, (UL94 V-0) Package Dimension (LxWxH) 12.5 x 13.5 x 4.0mm Package Weight 1g typ. 12.50 Dimension Drawing (mm) 4.00 13.50 Pin 2 2.50 Recommended Footprint Details 3 1 2 0.25 Bottom View 1 2.00 4 2.50 2 Top View 4 Pin Connections Pin # Single 1 +Vin 2 GND 3 +Vout 4 CTRL Tolerance: xx.xx= 0.25mm 3 0.25 www.recom-power.com REV.: 4/2019 I-4 ROF-78E DC/DC Converter Series Specifications (measured @ Ta= 25C, nom. Vin, full load and after warm-up unless otherwise stated) INSTALLATION AND APPLICATION Standard Application Circuit +Vin +Vin +Vout +Vout ROF-78Exx-0.5SMD GND CTRL GND GND Application Examples High Efficiency, Isolated, Dual Unregulated Output +Vin +Vin DC/DC Converter (1:1) +Vin +Vin +Vout ROF-78Exx-0.5SMD CTRL GND ROF-78Exx-0.5SMD CTRL DC/DC Converter (1:1) +Vout +Vout +Vout Com C1 C1 GND GND Com GND GND GND - Isolated dual output - Wide Input Range - Isolated dual output - Wide Input Range Isolated (up to 6kVDC), Wide Input Range Regulated Output +24V REC5/4812DRWZ/H6/A/SMD +Vin +Vin +Vin REC5/4812DRWZ/H6/A/SMD ROF-78Exx-0.5SMD CTRL GND ROF-78Exx-0.5SMD +Vin C1 R1 C1 R1 R2 GND CTRL C3 - High isolation voltage - Improved loading / line regulation -- Wide High isolation voltage input voltage range -- Improved loading / line regulation Point-of-load architecture - Wide input voltage range - Point-of-load architecture +Vout C2 GND +3.3V C2 C3 R2 GND +24V +3.3V +Vout GND GND V V Power Sequencing Power Sequencing 24V 24V 3.3V t 3.3V t PACKAGING INFORMATION Parameter Packaging Dimension (LxWxH) Packaging Quantity Type tape and reel (carton) tape and reel Tape Width Value 355.0 x 342.0 x 36.0mm 500pcs 24mm Storage Temperature Range -55C to +125C Storage Humidity 95% RH max. The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer. The products are not authorized for use in safety-critical applications without RECOM's explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized use of RECOM products in such safety-critical applications. www.recom-power.com REV.: 4/2019 I-5