* Efficiency up to 96%, no need for heatsinks * Pin-out compatible with LM78XX linears * Low profile (L*W*H=11.6*8.5*10.4mm) * Wide input range (5V - 42V) * Short circuit protection, thermal shutdown * Low ripple and noise * IEC/EN60950 certified * Positive to negative converter Features Switching Regulator DC/DC Converter R-78C-1.0 Description The R-78Cxx-1.0 series switching regulators are ideally suited to replace 1 Amp 78xx linear regulators and are pin compatible. Efficiencies of up to 96% means that very little energy is wasted as heat and the high input voltage is a useful feature. Selection Guide Part Number R-78C1.8-1.0 R-78C3.3-1.0 R-78C5.0-1.0 R-78C9.0-1.0 R-78C12-1.0 R-78C15-1.0 Input Voltage Range [VDC] 5 - 42 7 - 42 8 - 42 12 - 42 15 - 42 18 - 42 Output Voltage [VDC] 1.8 3.3 5 9 12 15 1.0 Amp SIP3 Single Output OutputEfficiency Current @ min Vin @ max. Vin [A] [%] [%] 1.0 80 71 1.0 89 79 1.0 93 85 1.0 95 90 1.0 96 92 1.0 96 94 Model Numbering R-78C__-1.0 Output Voltage Output Current IEC60950-1 certified EN60950-1 certified EN55032 compliant Specifications (measured at Ta= 25C, minimum load, otherwise specified) BASIC CHARACTERISTICS Parameter Condition Min. Input Voltage Range Output Voltage Range 1.8VDC 15VDC Quiescent Current 1mA Internal Operating Frequency Max. Capacitive Load Max. 42VDC 0% Minimum Load (1) Output Ripple and Noise (2) Typ. Vout +3V 280kHz 20MHz BW Vin= 24VDC Vout=1.8-15 full load with normal start-up time, no external components with <1 second start-up time + diode protection circuit 350kHz 420kHz 75mVp-p 120mVp-p 30mVp-p 470F 6800F Notes: Note1: No load operation will not damage these devices, however they may not meet all specifications A minimum load of 10mA is required Note2: Measurements are made with a 10F MLCC across output. (low ESR) REGULATIONS Parameter Condition Output Voltage Accuracy full load Line Voltage Regulation max. Vin, full load Load Voltage Regulation max. Vin. and 10% to 100% load Transient Response www.recom-power.com Value 2% typ. / 3% max. 0.2% typ. 0.4% typ. 100% <-> 50% load 100% <-> 10% load 75mV max. 200mV max. REV.: 3/2019 I-1 R-78C-1.0 DC/DC Converter Series Specifications (measured at Ta= 25C, minimum load, otherwise specified) PROTECTIONS Parameter Condition Value Short Circuit Protection (SCP) continuous, automatic recovery Short Circuit Input Current nom. Vin = 24VDC 65mA typ. External Zener Diode Calculation for Output Over Voltage Protection Minimum Zener Breakdown Voltage (VZmin) VOUTnom + 3% Accuracy +VIN R-78Cxx-1.0 R-78C Vout 1.8V (1.85V max.) 3.3V (3.4V max.) 5V (5.15V max.) 9V (9.27V max.) 12V (12.36V max.) 15V (15.45V max.) +VOUT Zener Voltage, Vz (Vzmin) 2.0V (1.90V) 3.6V (3.42V) 5.6V (5.32V) 10V (9.50V) 13V (12.35V) 14V (13.30V) 17V (16.15V) Recommended Zener Diode MMSZ679T1G MMSZ4685T1G MMSZ4690T1G MMSZ4697T1G MMSZ4700T1G / MMSZ4701T1G MMSZ4704T1G ENVIRONMENTAL Parameter Condition Operating Temperature Range Value with derating (see graph) -40C to +85C Max. Case Temperature +100C Temperature Coefficient 0.015%/C Case Thermal Impedance 70C/W max. Operating Altitude 2000m Operating Humidity non condensing 5% - 95% max., RH Pollution Degree PD2 MTBF +25C +68C MIL-HDBK 217F Derating Graph 8600 x 103 hours 3880 x 10 hours 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 68 85 Ambient Temperature [C] SAFETY AND CERTIFICATIONS Certificate Type (Safety) Information Technology Equipment, General Requirements for Safety Report / File Number 1603123 RoHS 2+ EAC Standard IEC60950-1:2005, 2nd Edition + AM 2:2013 EN60950-1:2006 + AM2:2013 RoHS 2011/65/EU + AM2015/863 RU-AT.49.09571 TP TC 004/2011 continued on next page www.recom-power.com REV.: 3/2019 I-2 R-78C-1.0 DC/DC Converter Series Specifications (measured at Ta= 25C, minimum load, otherwise specified) EMC Compliance Electromagnetic compatibility of multimedia equipment Emission requirements Condition Standard / Criterion with external filter (see filter suggestion below) EN55032, Class A and B EMC Filter Suggestion according to EN55032 L1 R-78C-1.0 +Vin +Vin C2 C1 +Vout +Vout GND GND GND Component List Class A MODEL R-78C3.3-1.0 R-78C5.0-1.0 Component List Class B C1 L1 MODEL 10F 100V MLCC 5.6H choke RLS-567 R-78C3.3-1.0 R-78C5.0-1.0 C1 C2 L1 10F 100V MLCC 10F 100V MLCC 12H choke RLS-126 Notes: Note3: Filter suggestions are valid for indicated part numbers only. For other part numbers, please contact RECOM tech support for advice DIMENSION AND PHYSICAL CHARACTERISTICS Parameter Value case potting Material non-conductive black plastic, (UL94 V-0) silicone, (UL94 V-0) Package Dimension (LxWxH) 11.6 x 8.5 x 10.4mm Package Weight 2g typ. Dimension Drawing (mm) embossed logo 8.5 0.70+0.10/-0.05 0.250.05 3.21 Recommended Footprint 2.54 5.08 Marking 4.10 0.51 10.4 11.6 Tolerance: xx.x= 0.50mm xx.xx= 0.25mm Top View 1 2 3 2.00 1 2 3 Bottom View Pin Connections Pin # Function 1 +Vin 2 GND 3 +Vout 2.54 www.recom-power.com REV.: 3/2019 I-3 R-78C-1.0 DC/DC Converter Series Specifications (measured at Ta= 25C, minimum load, otherwise specified) INSTALLATION AND APPLICATION Positive to Negative Converter 1 +VIN R-78Cxx-1.0 3 2 C1 10F/50V Pin Connections Pin # Negative 1 +Vin 2 -Vout 3 GND C2 10F/50V GND GND Positive +Vin GND +Vout -VOUT Selection Guide - Negative Output Part Number R-78C1.8-1.0 R-78C3.3-1.0 R-78C5.0-1.0 R-78C9.0-1.0 R-78C12-1.0 R-78C15-1.0 Input Voltage Range (3) [VDC] 5 - 38 7 - 37 8 - 35 12 - 31 15 - 28 18 - 25 Output Voltage [VDC] -1.8 -3.3 -5 -9 -12 -15 OutputEfficiency Current @ min Vin @ max. Vin [A] [%] [%] -0.8 69 70 -0.8 77 80 -0.7 79 83 -0.6 85 87 -0.5 87 89 -0.5 89 90 Notes: Note4: When using the R-78C as positive-to-negative converter, the input voltage range is limited Dual Output (two Converters) with Negative Output 1 +VIN R-78Cxx-1.0 3 +VOUT 2 C1 10F/50V GND GND R-78Cxx-1.0 C2 3 2 10F/50V -VOUT Notes: Note5: When connecting two R-78C together to create a dual output, both connectors must be connected in parallel Connecting them in series might cause start-up problems of the second R-78C www.recom-power.com REV.: 3/2019 I-4 R-78C-1.0 DC/DC Converter Series Specifications (measured at Ta= 25C, minimum load, otherwise specified) High Efficiency Regulated Outputs +5VDC REC3-0515DRW/H2/A +12VDC R-78Cxx-1.0 +VIN C1 Com C2 -12VDC -VIN C1: optional; C2: Required (further decoupling filtering may be neccesary between the two conversters) -Triple Outputs - Wide Input Range 8V to 42V - High System Efficiency, Suitable for 12V, 24V, 36V Battery Powered Devices Standard Application Circuit R-78Cxx-1.0 +VIN C1 +VOUT C2 10F MLCC (optional) (optional) GND GND To protect the converter during power-up, use soft start power supply. Low Voltage AC Input, Regulated DC Output +24VDC unreg. (27-40VDC) ~ R-78Cxx-1.0 + C1 24VAC +/-20% ~ +5VREG C2 GND -Low Voltage AC Input -Regulated and protected DC Output PACKAGING INFORMATION Parameter Type Value Packaging Dimension (LxWxH) tube 520 x 18.2 x 11.2mm Packaging Quantity 42pcs Storage Temperature Range -55C to +125C 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.: 3/2019 I-5