Features • Low profi le 4.0mm • Low cost DC/DC Converter • Wide input range (5V - 36V) • Short circuit protection • Casellated connections ROF-78E Description Non The ROF-78E is a switching regulator with a wide input voltage range, high effi ciency and a low profi le, Isolated 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 -40°C to +75°C without Power Module derating. An enable connection allows power sequencing or very low standby consumption (3.5µA) for battery powered applications. These modules can be SMD refl ow soldered. The connection pads have corner half-vias to enable optical inspection of the joints after soldering. Selection Guide Part Input Output Output Effi ciency Number Voltage Range Voltage Current typ. [VDC] [VDC] [mA] [%] ROF-78E3.3-0.5SMD-R 5 - 36 3.3 500 73 - 84 ROF-78E5.0-0.5SMD-R 9 - 36 5.0 500 79 - 87 Model Numbering ROF-78E__-__SMD-R Output Voltage Packaging (1) Output Current Notes: Note1: suffi x -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 Specifi cations (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. Input Voltage Range nom. Vin= 12VDC and 24VDC 5VDC 36VDC Input Current 500mA Quiescent Current 5mA Minimum Load (2) 10% DC-DC ON Open or >1.75VDC ON/OFF CTRL max. Vin= 5VDC DC-DC OFF GND or <0.7VDC Standby Current DC-DC OFF 3.5µA 6.5µA Internal Operating Frequency 650kHz Output Ripple and Noise 20MHz BW 100mVp-p ROF-78E3.3-0.5SMD Effi ciency vs. Load Ripple vs. Load 100 100 5Vin 12Vin 90 90 24Vin 80 80 36Vin 70 70 y [%] 60 mV] 60 cienc 50 pple [ 50 Effi 40 Ri 40 30 30 5Vin 20 12Vin 20 24Vin 10 10 36Vin 0 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Output Load [%] Output Load [%] ROF-78E5.0-0.5SMD Effi ciency vs. Load Ripple vs. Load 100 100 9Vin 90 90 12Vin 24Vin 80 80 36Vin 70 70 y [%] 60 mV] 60 cienc 50 pple [ 50 Effi 40 Ri 40 30 30 9Vin 20 12Vin 20 24Vin 10 10 36Vin 0 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Output Load [%] Output Load [%] www.recom-power.com REV.: 4/2019 I-2

ROF-78E DC/DC Converter Series Specifi cations (measured @ Ta= 25°C, 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. 100% to 50% load ±100mV Transient Response 100% to 10% load ±200mV Notes: Note2: Operation below 10% load will not harm the converter, but specifi cations may not be met PROTECTIONS Parameter Condition Value Short Circuit Protection (SCP) automatic recovery Short Circuit Input Current 200mA max. Over Current Protection (OCP) >950mA typ. Hiccup mode Optional Diode Protection Circuit +Vin +Vin RO5F.0-7S8MEDxx- +Vout +Vout GND Optional Protection 1: Optional Protection 2: Add a blocking diode to Vout if GND GND current can fl ow backwards into the output, as this can damage the converter when it is powered down. +Vin +Vin RO5F.0-7S8MEDxx- +Vout +Vout +Vin +Vin RO5F.0-7S8MEDxx- +Vout +Vout+ -V Voustd= forward The diode can either be fi tted GND GND across the device if the source is low impedance or fi tted in series with the output (recommended). GND GND GND GND +Vin +Vin ROF-78Exx- +Vout +Vout= 5.0SMD +Vout - Vsd forward ENVIRONMENTAL GND Parameter Condition Value Operating Temperature Range GND with derating @ free air convection (GsNeeD graph) -40°C to +85°C Operating Humidity non-condensing 5% - 95% RH max. MTBF according to MIL-HDBK-217F, G.B. +25°C 3500 x 103 hours Derating Graph (@ free air convection) 100 90 80 70 %] d [ 60 a o ut L 50 p ut 40 O 30 20 10 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90100 75 85 Ambient Temperature [°C] www.recom-power.com REV.: 4/2019 I-3

ROF-78E DC/DC Converter Series Specifi cations (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated) SAFETY AND CERTIFICATIONS Certifi cate Type (Safety) Report / File Number Standard RoHs 2+ RoHS-2011/65/EU + AM-2015/863 EAC RU-AT.49.09571 TP TC 004/2011 EMC Compliance Condition Standard / Criterion Information technology equipment - Radio disturbance with external fi lter EN55032, Class B characteristics - Limits and methods of measurement EMC Filtering Suggestion according to EN55032 Class A and Class B Component List Class A and B L1 +V +V +V in ROF-78Exx-0.5SMD out +V C1 C2 L1 in out GND 1µF 1µF 33µH C1 C2 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. Dimension Drawing (mm) 12.50 Pin 2 0 5 3. 1 Pin Connections 0 0 4. Pin # Single Recommended Footprint Details 1 +Vin 2 GND 0 2.50 5 2. 3 +Vout 4 CTRL 4 3 1 2 Tolerance: x x.xx= ±0.25mm Bottom View Top View 0 5 0 2 1 2 2. 0. 4 3 0.25 www.recom-power.com REV.: 4/2019 I-4

ROF-78E DC/DC Converter Series Specifi cations (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated) INSTALLATION AND APPLICATION Standard Application Circuit +V +V +V in out +V in ROF-78Exx-0.5SMD out CTRL GND GND GND Application Examples High Effi ciency, Isolated, Dual Unregulated Output DC/DC Converter (1:1) +V +V +V in out DC/DC Converter (1:1) +V in +V ROF-78Exx-0.5SMD +V out +V in out +V in RCOTFRL-78EGxNxD-0.5SMD C1 out Com CTRL GND C1 Com GND 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 +24V +V REC5/4812DRWZ/H6/A/SMD +Vin ROF-78Exx-0.5SMD +Vout +3.3V in +V +Vin RCTORFL-78EGxNxD-0.5SMD +Vout +3.3V in C1 C2 R1 CTRL GND C1 C3 C2 RR21 GND C3 GND R2 GND GND Power Sequencing - High isolation voltage V - Improved loading / line regulation Power Sequencing -- WHiigdhe iisnoplautti ovno ltvaogltea graenge V 24V - Improved loading / line regulation - Point-of-load architecture - Wide input voltage range 24V - Point-of-load architecture 3.3V 3.3tV t PACKAGING INFORMATION Parameter Type Value Packaging Dimension (LxWxH) tape and reel (carton) 355.0 x 342.0 x 36.0mm Packaging Quantity tape and reel 500pcs Tape Width 24mm Storage Temperature Range -55°C to +125°C 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

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: R ECOM: ROF-78E3.3-0.5SMD-R ROF-78E5.0-0.5SMD-R