Features ● ● ● ● ● ● ● INNOLINE Efficiency up to 94%,Non isolated, no need for heatsinks SMD Package (UL94V-0 Material ) Adjustable Output Voltage Wide input range.(4.75V ~ 18V) Short circuit protection, Thermal shutdown Remote On/Off Control Very Low Shutdown Current DC/DC-Converter R-78Axx1.0SMD Series Selection Guide Part Number SMD Input Range (1) (V) Output Voltage (V) Adjust Range (V) Output Current (A) Efficiency Min. Vin Max. Vin (%) (%) R-78A1.8-1.0SMD 4.75 – 18 1.8 1.5~3.3 1.0 82 71 R-78A2.5-1.0SMD 4.75 – 18 2.5 1.5~4.5 1.0 87 77 R-78A3.3-1.0SMD 4.75 – 18 3.3 1.8~5.5 1.0 91 81 R-78A5.0-1.0SMD 6.5 – 18 5.0 2.5~5.5 1.0 94 86 1.0 AMP SMD Single Output Description The R-78Axx-1.0SMD series high efficiency switching regulators are ideally suited to pick-and-place mass production. The efficiency of up to 94% means that very little energy is wasted as heat. remote on/off control and adjustable output voltage are useful additional features of this versatile SMD converter series. Specifications ( typical at 25°C, 10% minimum load, unless otherwise specified ) Characteristics Conditions Min. Input Voltage Range (Note 1) See Table 4.75 Output Voltage Range See Table 1.5 Output Current All Series 0 Typ. Max. 18.0V 5.5V 1000mA Output Current Limit All Series 3000mA Short Circuit Input Current All Series 30mA Internal Power Dissipation 0.4W Short Circuit Protection Continuous, automatic recovery Output Voltage Accuracy (At 100% Load) All Series Adjustable Voltage Range See Table 1 ±2 ±3% ±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 ±85mV ±100mV Ripple & Noise (20MHz BW) 20mVp-p 30mVp-p Temperature Coefficient -40°C~+85°C ambient Max capacitance Load 220µF 280 Quiescent Current 350 Vin = min. to max. at 0% load Shutdown Current Remote On/Off Threshold Voltage 0.8 5 7mA 20 35µA 1.2 1.6V ON: Open or 1.6<Vr<5V, OFF: GND or 0<Vr<1.6V Operating Temperature Range Switch On/Off Time Ir=1.8uA typ. -40°C +85°C (using Remote On/Off Control) 50ms Operating Case Temperature +100°C Storage Temperature Range -55°C +125°C Case Thermal Impendance Thermal Shutdown 70°C / W Internal IC junction +160°C Package Weight MTBF (+25°C) . (+71°C) (Ambient Temperature) 430kHz 120 100 Output Power (%) Switching Frequency ON/OFF Remote Control Derating-Graph 0.015%/°C 80 60 40 30 20 0 -40 Safe Operating Area 0 25 50 Operating Temperature (°C) 60 85 75 100 2.7g } Detailed Information see Application Notes chapter "MTBF" www.recom-international.com using MIL-HDBK 217F 13338 x 10³ hours using MIL-HDBK 217F 3880 x 10³ hours 04-April-2007 151 R-78Axx-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 Add a blocking diode to Vout if current can flow backwards into the output, as this can damage the converter.. See Application Examples for details. R1 6 R2 -Vin -Vout Characteristics Ripple Efficiency 100 50 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V 75 Vo=3.3V Vo=2.5V Vo=1.8V Ripple (mV) Efficiency (%) Vo=5V 25 50 25 5 15 10 5 18 100 50 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V 75 Vo=3.3V Vo=2.5V Vo=1.8V Ripple (mV) Efficiency (%) Vo=5V 25 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 50 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V 75 25 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V Ripple (mV) 50 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 ) 152 15 10 Vin ( V ) Vin ( V ) 04-April-2007 www.recom-international.com R-78Axx-1.0 SMD Series INNOLINE DC/DC-Converter 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 Com 3.3V/5V Select (TTL) 4.7kW REC10-4812SRWZ/H [email protected] +Vin R-78A5.0-1.0 Z1 C1 -Vin C2 R1 - High isolation voltage - 1.6kV - Improved loading / line regulation - Wide Input Voltage Range - 18~75V - Point-of-Load Architecture - Power Sequencing - Low voltage supplies turn on after 12V supply has stabilised. - Further decoupling filtering may be necessary between the converters On/Off +5V@1A C3 0V C3,C4 : optional R-78A3.3-1.0 On/Off +3.3V@1A C4 0V www.recom-international.com 04-April-2007 153 R-78Axx-1.0 SMD Series INNOLINE DC/DC-Converter Table 1: Adjustment Resistor Values 1.0Adc R-78A1.8-1.0SMD R-78A2.5-1.0SMD R-78A3.3-1.0SMD R-78A5.0-1.0SMD 1.8Vdc 2.5Vdc 3.3Vdc 5.0Vdc Vout (nom.) Vout (adj) R1 1.5 (V) 3KΩ R2 R1 R2 R1 R2 R1 R2 200Ω 1.8 (V) 12KΩ 770Ω 2.5 (V) 12KΩ 3.0 (V) 4.7KΩ 50KΩ 3.3 (V) 2.7KΩ 29KΩ 21KΩ 5.6KΩ 88.4KΩ 17KΩ 27KΩ 3.6 (V) 19.4KΩ 69KΩ 42KΩ 3.9 (V) 14kΩ 30.5KΩ 58KΩ 4.5 (V) 8kΩ 12.1kΩ 180KΩ 4.9 (V) 7.k6Ω 850KΩ 5.0 (V) 6.8kΩ 5.1 (V) 6.2kΩ 540kΩ 5.5 (V) 4kΩ 71kΩ Package Style and Pinning (mm) 3rd angle projection SMD 10Pin Package 9.30 15.24 14.84 7.05 1.65 10 9 8 7 6 9.00 RECOM R-78Axx-1.0SMD xxxx 9.00 1 2 3 4 5 8.60 10.00 2.54x4 Pin Connections 11.80 Recommended Footprint Details 0.55 13.00 Bottom View 2.54 154 1.20 10 9 8 7 6 Top View 1 2 3 4 5 1.20 04-April-2007 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 www.recom-international.com