Features ● ● ● ● ● ● ● Replacement for R-78Axx-1.0SMD series RoHS 6/6 Conform (100% Lead Free) High Reflow Temperature SMD Package Adjustable Output Voltage Short circuit protection, Thermal shutdown Remote On/Off Control Very Low Shutdown Current INNOLINE DC/DC-Converter with 3 year Warranty Description 1.0 AMP SMD Single Output The R-78AAxx-1.0SMD series are manufactured without lead and meet the requirements for RoHS 6/6 as well as the increased reflow soldering temperatures associated with vapor phase soldering, making these high efficiency switching regulators ideally suited to modern pick-and-place mass production. The efficiency of up to 94% means that very little energy is wasted as heat. The additional features of remote on/off control and adjustable output voltages will find many uses in the battery-powered, industrial, medical and automotive markets. Selection Guide Part Number SMD Input Range (V) Output Voltage (V) Adjust Range (V) Output Current (A) R-78AA1.5-1.0SMD* 4.75 – 18 1.5 fixed 1.0 77 73 R-78AA1.8-1.0SMD* 4.75 – 18 1.8 1.5~3.0 1.0 82 76 R-78AA2.5-1.0SMD* 4.75 – 18 2.5 1.5~3.0 1.0 87 81 R-78AA3.3-1.0SMD* 4.75 – 18 3.3 3.0~5.5 1.0 90 84 R-78AA5.0-1.0SMD* 5.0 3.0~5.5 1.0 94 89 6.5 – 18 Efficiency Min. Vin Max. Vin (%) (%) * add suffix -R for tape&reel packing e.g. R-78AA5.0-1.0-R. For more details see Application Notes. RoHS 2011/65/EU 6/6 Specifications ( typical at 25°C, 10% minimum load, unless otherwise specified ) www.recom-power.com REV: 0/2015 IEC/EN-60950-1 Certified R-78AA-1.0 Derating-Graph (Ambient Temperature) 120 100 Output Power (%) Characteristics Conditions Min. Typ. Max. Input Voltage Range See Table 4.75V 18.0V Output Voltage Range See Table 1.5V 5.5V Output Current All Series 0mA* 1000mA Short Circuit Input Current Vin = 12V 120mA Internal Power Dissipation 0.4W Short Circuit Protection Continuous, automatic recovery Output Voltage Accuracy 100% Load ±2% ±3% Adjustable Voltage Range See Table 1 ±50% Line Voltage Regulation (Vin = min to max at full load) 0.2% 0.4% Load Regulation (10% to 100% full load) 0.7% 1.0% Dynamic Load Stability 100%<>50% load, 25mA/µs ±85mV ±100mV Ripple & Noise (20MHz BW) 20mVp-p 30mVp-p Temperature Coefficient -40°C~+85°C ambient 0.015%/°C Max capacitance Load with normal start-up time, no external components 470µF with <1 second start up time + diode protection circuit 6800µF Switching Frequency 335kHz 385kHz 435kHz Quiescent Current Vin = min. to max. at 0% load 5mA 7mA ON/OFF Remote Control Pin Drive Current ON: Open or 1.6V<Vr<5V OFF: GND or 0<Vr<1.6V Ir=1.8µA typ Converter Input Current (valid for Vr < 1.6V) 20µA 35µA Remote On/Off Threshold Voltage (Vr rising) 2.4V 2.6V 2.8V Remote On/Off Voltage Hysteresis 250mV Operating Temperature Range -40°C +85°C Switch On/Off Time (using Remote On/Off Control) 50ms Operating Case Temperature +100°C Storage Temperature Range -55°C +125°C Case Thermal Impedance 70°C / W continued on next page 80 60 40 30 20 0 -40 Safe Operating Area 0 25 50 Operating Temperature (°C) 60 85 75 100 Refer to Application Notes I-15 R-78AAxx-1.0 SMD Series INNOLINE DC/DC-Converter Specifications ( typical at 25°C, 10% minimum load, unless otherwise specified ) Case Material EMC Conducted Emissions (with filter) Radiated Emissions (with filter) ESD Radiated Immunity Fast Transient Conducted Immunity Magnetic Field Immunity Certifications IEC/EN General Safety Non-Conductive Black Plastic Class B Class B Class A Class A Class A Class A Class A EN55022 EN55022 EN61000-4-2 EN61000-4-3 EN61000-4-4 EN61000-4-6 EN61000-4-8 Report: SPCLVD 1407030-1 IEC/EN-60950-1, 2nd Edition Package Weight 1.7g Packing Quantity 33 pcs per Tube 250 pcs per Reel MTBF (+25°C) . (+71°C) } 13338~21070 x 10³ hours Detailed Information see Application Notes chapter "MTBF" using MIL-HDBK 217F 3880~6769 x 10³ hours *Note: Operation under no load will not damage these devices, however they may not meet all specifications. A minimum load of 10mA is recommended Characteristics Ripple Efficiency 50 100 90 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V 70 Vo=5V 25 Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Ripple (mV) R-78AA-1.0 Efficiency (%) 80 60 5 15 10 5 18 50 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Vo=5V 25 Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Ripple (mV) Efficiency (%) 100 90 80 70 60 50 25 0.2 0.4 0.6 0.8 1.0 0.2 1.2 0.4 0.6 0.8 1.0 1.2 Output Current ( A ) Output Current ( A ) Ripple Vs Load ( Vin=Max ) Efficiency Vs Load ( Vin=Max ) 100 90 80 70 60 50 50 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V 25 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Ripple (mV) Efficiency (%) 18 Ripple Vs Vin ( Full Load ) Efficiency Vs Vin (Full Load) 25 0.2 0.4 0.6 0.8 1.0 0.2 1.2 0.4 0.6 0.8 1.0 1.2 Output Current ( A ) Output Current ( A ) Ripple Vs Load ( Vin=Min ) Efficiency Vs Load ( Vin=Min ) I-16 15 10 Vin ( V ) Vin ( V ) REV: 0/2015 www.recom-power.com R-78AAxx-1.0 SMD Series INNOLINE DC/DC-Converter Standard Application Circuit +Vin 1,2 R-78Axx-1.0 SMD 10 3,7,8,9 On/Off +Vout 4,5 R1 6 R2 -Vin -Vout Application Examples 3.3V/5V Selectable 1A Power Supply Vout = 3.3V or 5.0V @ 1A R-78A3.3-1.0SMD +Vin 6.8kW On/Off -Vin 3.3V/5V Select (TTL) R-78AA-1.0 Com 4.7kW Optional 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). Optional Protection 2: +Vin R-78A(A)xx -xxxSMD +Vout R-78A(A)xx -xxxSMD +Vout Diode CTRL CTRL -Vin -Vout +Vin R-78xx-xx Application example: Driving a high capacitive load Trim output voltage up 1 diode drop -Vin -Vout +Vout 6800µF -Vin www.recom-power.com +Vin -Vout REV: 0/2015 I-17 R-78AAxx-1.0 SMD Series INNOLINE DC/DC-Converter Table 1: Adjustment Resistor Values R1 R2 R3 Vref(V) 1.8V 10KΩ 21KΩ 5.6KΩ 1.23 2.5V 22KΩ 21KΩ 5.6KΩ 1.23 3.3V 16.9KΩ 10KΩ 5.6KΩ 1.23 5.0V 30.9KΩ 10KΩ 10KΩ 1.23 +Vin +Vo Rdown R1 Controlled IC R2 Vadj R3 Rup -Vin -Vo Vref R2(R1+R3) x (Vref - Vo) + Vref x R1R3 Trim Down Rdown = R2Vo - Vref (R1 + R2) R2R3 (Vref - Vo) + Vref R1 (R2 + R3) Rup = R-78AA-1.0 Trim up R2 (Vo - Vref) - Vref R1 Package Style and Pinning (mm) SMD 10Pin Package 9.60 15.30 15.00 8.80 10 9 8 7 6 9.40 RECOM 9.24 R-78Axx-1.0SMD xxxx 1 2 3 4 5 2.54x4 11.00 12.35 Recommended Footprint Details 0.55 13.00 Bottom View 2.54 Pin Connections 1.30 10 9 8 7 6 Top View 1 2 3 4 5 1.20 ±1.0 1.80 Pin # 1,2 +Vin 3,7,8,9 GND 4,5 +Vout 6 V adj 10 Remote On/Off xx.x ±0.5mm xx.xx ±0.25mm The product information and specifications are subject to change without prior notice. RECOM products are not authorized for use in safety-critical applications (such as life support) without RECOM’s explicit written consent. A safety-critical application is defined as an application where a failure of a RECOM product may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The buyer 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. I-18 REV: 0/2015 www.recom-power.com