• Efficiency up to 96%, no heatsinks required Features • Pin-out compatible with LM78XX linears • Low profile (L/W/H=11.5 x 8.5 x 17.5mm) DC/DC Converter • High input voltage range, up to 72V Switching • Short circuit protection, thermal shutdown • Low ripple and noise Regulator • „L“ version with 90° pins R-78HB-0.5(L) • Positive to negative converter Description 0.5 Amp The R-78HBxx-Series high efficiency, high input voltage switching regulators are ideally suited to replace SIP3 78xx linear regulators and are pin compatible. The efficiency of up to 96% means that very little energy is wasted as heat so there is no need for any heat sinks with their additional space and mounting costs. Single Output An input voltage range of up to 8:1 is unsurpassed by any other converter and allows the full stored energy utilization of standard and high voltage batteries. The fully protected output is ideal for industrial applications (especially for industry standard 24VDC bus supplies) and the L-Version with 90° pins allows direct replacement for laid-flat regulators where component height is at a premium. Low ripple and noise figures and a short circuit input current of typically only 15mA round off the specifications of this versatile converter series. Typical applications include telecommunication, automotive, industrial, aerospace and battery powered applications. Selection Guide Part Input Output Output Efficiency Number Voltage Range Voltage Current @ min Vin @ max. Vin [VDC] [VDC] [A] [%] [%] R-78HB3.3-0.5 9 - 72 3.3 0.5 82 76 R-78HB5.0-0.5 9 - 72 5.0 0.5 87 81 R-78HB6.5-0.5 9 - 72 6.5 0.5 91 84 R-78HB9.0-0.5 14 - 72 9.0 0.5 92 86 R-78HB12-0.5 17 - 72 12 0.5 94 89 R-78HB15-0.5 20 - 72 15 0.5 95 91 R-78HB24-0.3 36 - 72 24 0.3 96 92 Model Numbering R-78HB__- (L) Output Voltage Pinning (1) Output Current Notes: IEC/EN60950-1 certified Note1: add suffix „L” for 90° bent pins, e.g. R-78B5.0-1.0L EN55032 compliant Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. Internal Input Filter 1µF capacitor Absolute Maximum Input Voltage 75VDC Quiescent Current nom. Vin= 48VDC 1mA 5mA Internal Power Dissipation 0.65W Minimum Load (2) 2% Notes: Note2: Operation under no load will not harm the converter, but specifications may not be met A minimum load of 10mA is recommended continued on next page www.recom-power.com REV.: 5/2019 I-1

R-78HBxx-0.5(L) DC/DC Converter Series Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) Parameter Condition Min. Typ. Max. Internal Operating Frequency nom. Vin= 48VDC 120kHz 800kHz Output Ripple and Noise 20MHz BW (10 - 100% load) 20mVp-p 60mVp-p Absolute Maximum 1 second start up, no external components 100µF Capacitive Load <1 second start up + diode protection circuit 6800µF Switching Frequency vs. Load 800 400 z] H y [k 200 c n e qu 24Vout e 100 Fr 15Vout 12Vout 9Vout 50 6.5Vout 5Vout 3.3Vout 10 10 50 100 200 300 400 500 Output Current (mA) Efficiency vs. Vin (full load) Ripple vs. Vin (full load) 100 50 24Vout 15, 12Vout 90 45 9Vout 80 40 6.5Vout 5Vout 70 35 3.3Vout %] cy [ 60 mV] 30 en 50 e [ 25 ci 24Vout pl Effi 40 15Vout Rip 20 30 12Vout 15 9Vout 20 6.5Vout 10 5Vout 10 5 3.3Vout 0 0 9 18 27 36 45 54 63 72 9 18 27 36 45 54 63 72 Input Voltage [VDC] Input Voltage [VDC] continued on next page www.recom-power.com REV.: 5/2019 I-2

R-78HBxx-0.5(L) DC/DC Converter Series Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) Efficiency vs. Load (max. Vin) Ripple vs. Load (max. Vin) 100 60 24Vout 90 15, 12Vout 9Vout 50 80 6.5Vout 5Vout 70 %] 40 3.3Vout cy [ 60 mV] Efficien 4500 2145VVoouutt Ripple [ 30 30 12Vout 20 9Vout 20 6.5Vout 10 5Vout 10 3.3Vout 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 [%] Efficiency vs. Load (min. Vin) Ripple vs. Load (min. Vin) 100 60 24Vout 15, 12Vout 90 9Vout 50 80 6.5Vout 5Vout 70 %] 40 3.3Vout y [ 60 mV] c en 50 e [ 30 ci pl Effi 40 24, 15Vout Rip 20 30 12Vout 9Vout 20 6.5Vout 10 10 5Vout 3.3Vout 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 [%] REGULATIONS Parameter Condition Value Output Accuracy 100% load ±2.0% typ / ±3.0% max. Line Regulation low line to high line, 100% load ±0.4% typ. / ±1.0% max. Load Regulation 10% to 100% load ±0.3% typ. / ±0.6% max. Transient Response (3) 100% <-> 50% load ±75mV typ. / ±100mV max. Notes: Note3: Measurements are made with a 100µF output capacitor www.recom-power.com REV.: 5/2019 I-3

R-78HBxx-0.5(L) DC/DC Converter Series Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) PROTECTIONS Parameter Condition Value Short Circuit Protection (SCP) below 100mW continuous, automatic recovery R-78HBxx-0.5 Short Circuit Input Current nom. Vin= 24VDC +Vin +Vin +Vout 15mA typ. /+ 2Vo5utmA max. GND Optional Diode Protection Circuit Optional Protection 1: Optional Protection 2: Add a blocking diode to Vout if GND GND current can flow backwards into the output, as this can damage the R-78HBxx-0.5 R-78HBxx-0.5 converter when it is powered down. +Vin +Vin +Vout +Vout +Vin +Vin +Vout +Vout= GND GND +V - 0.3V The diode can either be fitted out across the device if the source is low impedance or fitted in series GND GND GND GND with the output (recommended). Protection Circuit ++VViinn ++VVRiRnin--7788HHGNBBDxxxx--00++..55VVoouutt +++VVVoouutt= - 0.3V GND out C1 GND GND GND GND To protect the converter during power-up, use C1=3.3µF/100V if Vin>50V ENVIRONMENTAL Parameter Condition Value Operating Temperature Range with derating (see graph) -40°C to +85°C Maximum Case Temperature +100°C Temperature Coefficient ±0.015%/K Thermal Impedance 0.1m/s, vertical 60K/W Operating Altitude 2000m Operating Humidity non-condensing 95% RH max. Pollution Degree PD2 +25°C 7395 x 103 hours MTBF according to MIL-HDBK-217F, G.B. +71°C 1242 x 103 hours Derating Graph 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 71 85 Ambient Temperature [°C] www.recom-power.com REV.: 5/2019 I-4

R-78HBxx-0.5(L) DC/DC Converter Series Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) SAFETY AND CERTIFICATIONS Certificate Type (Safety) Report / File Number Standard IEC60950-1:2005, 2nd Edition + AM 2:2013 Information Technology Equipment, General Requirements for Safety 1603123 EN60950-1:2006 + AM 2:2013 EAC RU-AT.49.09571 TP TC 004/2011 RoHs 2+ RoHS 2011/65/EU + AM2015/863 EMC Compliance Condition Standard / Criterion Electromagnetic compatibility of multimedia equipment - EN55032, Class A with external components Emission requirements EN55032, Class B ESD Electrostatic discharge immunity test Air ±8kV, Contact ±4kV EN61000-4-2, Criteria A Radiated, radio-frequency, electromagnetic field immunity test 3V/m EN61000-4-3, Criteria A DIMENSION AND PHYSICAL CHARACTERISTICS Parameter Type Value case non-conductive black plastic, (UL94 V-0) Material potting silicone, (UL94 V-0) Package Dimension (LxWxH) 11.5 x 8.5 x 17.5mm Package Weight 4g typ. Dimension Drawing (mm) with suffix „L” bent pins embossed logo Pin Connections embossed logo Pin # Single 11.5 8.5 11.5 8.5 1 +Vin 2 GND 3 +Vout Tolerance: xx.x= ±0.5mm 5 5 xx.xx= ±0.25mm 17. Marking 17. 9.0 Marking 1 0.51 0.51 90-93°±0.050.25 0.70+0.10/-0.05 50 6.10 0.70+0.10/-0.05 0 0.25±0.05 1. 1 4. Recommended Footprint Details Recommended Footprint Details Bottom View 2.54 Bo1ttom2 Vi3ew 2.00 2.54 1 2 3 1 2 3 Top View Top View 0 0 3.21 5.082.0 2.54 5.08 4.1 1 2 3 2.54 www.recom-power.com REV.: 5/2019 I-5

R-78HBxx-0.5(L) DC/DC Converter Series Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) INSTALLATION AND APPLICATION Positive to Negative Converter C1 and C2 are required and should be fitted close to the converter pins. R-78HBxx-0.5 Maximum capacitiv load including +V in 1 3 C2 is 100µF 2 C1 C2 Pin Connections -V out Pin # Negative Positive 1 +Vin +Vin GND GND 2 -Vout GND 3 GND +Vout 1 2 3 R-78HBxx-0.5 +V in 1 3 2 Selection Guide - Negative Output C1 C2 Part Input Output O-uVtput Efficiency External Capacitor out Number Voltage Range Voltage Current @ min Vin @ max. Vin C1 C2 (4) [VDC] [VDC] [A] [%] [%] GND GND R-78HB3.3-0.5 15 - 65 -3.3 -0.4 78 75 1µF/100V 22µF/6.3V R-78HB5.0-0.5 15 - 65 -5.0 -0.4 82 80 1µF/100V 22µF/10V R-78HB6.5-0.5 15 - 65 2 -6.5 -0.3 84 82 1µF/100V 10µF/10V R-78HB9.0-0.5 15 - 16R2- 78HBxx-0.53 -9.0 -+0V.o2ut 87 85 1µF/100V 10µF/16V R-78HB12-0.5 15 - 59 -12 -0.2 88 86 1µF/100V 10µF/25V R-78HB15-0.5 15 - 56 -15 -0.2 89 87 1µF/100V 10µF/25V R-78HB24-0.3 15 - 48 -24 -0.2 89 87 1µF/100V 10µF/35V R-78HBxx-0.5 +V in 1 3 Notes: 2 Note4: Maximum Capacitive Load including C2 is 100µF C1 C2 -V out GND GND Dual Output (two Converters) with Negative Output R-78HBxx-0.5 +V in 1 3 2 C1 C2 -V out GND GND 2 1R-78HBxx-0.53 +Vout continued on next page www.recom-power.com REV.: 5/2019 I-6

R-78HBxx-0.5(L) DC/DC Converter Series Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) High Input Voltage Multiple Output Supply Revese Polarity Protection R-78HBxx-0.5 +Batt +V +V +12V @ 100mA in out GND R-785.0-1.0 +V +V +5V @ 850mA C in out storage GND Brown out 10uF Protection -Batt 0V Com • Wide input range 18V to 72V - can be used with 24V, 48V or 60V batteries • +12V outputs for interface and display electronics • +5V high current output for digital electronics • Further decoupling filtering may be necessary between the converters PACKAGING INFORMATION Parameter Type Value without suffix 520.0 x 25.1 x 10.6mm Packaging Dimension (LxWxH) tube with suffix “L” 520.0 x 26.1 x 15.8mm Packaging Quantity tube 42pcs 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.: 5/2019 I-7

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: R ECOM: R-78HB24-0.3 R-78HB3.3-0.5 R-78HB5.0-0.5 R-78HB12-0.5 R-78HB12-0.5L R-78HB15-0.5 R-78HB15-0.5L R- 78HB24-0.3L R-78HB3.3-0.5L R-78HB5.0-0.5L R-78HB6.5-0.5 R-78HB6.5-0.5L R-78HB9.0-0.5 R-78HB9.0-0.5L