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| Features 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 INNOLINE DC/DC-Converter Selection Guide Part Number SMD R-78A1.8-1.0SMD R-78A2.5-1.0SMD R-78A3.3-1.0SMD R-78A5.0-1.0SMD Input Range (1) (V) 4.75 - 18 4.75 - 18 4.75 - 18 6.5 - 18 Output Voltage (V) 1.8 2.5 3.3 5.0 Adjust Range (V) 1.5~3.3 1.5~4.5 1.8~5.5 2.5~5.5 Output Current (A) 1.0 1.0 1.0 1.0 Efficiency Min. Vin Max. Vin (%) (%) 82 87 91 94 71 77 81 86 R-78Axx1.0SMD Series 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 25C, 10% minimum load, unless otherwise specified ) Characteristics Input Voltage Range (Note 1) Output Voltage Range Output Current Output Current Limit Short Circuit Input Current Internal Power Dissipation Short Circuit Protection Output Voltage Accuracy (At 100% Load) Adjustable Voltage Range Load Regulation (10% to 100% full load) Dynamic Load Stability Ripple & Noise (20MHz BW) Temperature Coefficient Max capacitance Load Switching Frequency Quiescent Current Shutdown Current Remote On/Off Threshold Voltage ON/OFF Remote Control Operating Temperature Range Switch On/Off Time Operating Case Temperature Storage Temperature Range Case Thermal Impendance Thermal Shutdown Package Weight MTBF (+25C) . (+71C) Internal IC junction using MIL-HDBK 217F using MIL-HDBK 217F +160C 2.7g 13338 x 10 hours 3880 x 10 hours 151 -55C 0.8 ON: Open or 1.6 Line Voltage Regulation (Vin = min to max at full load) 85mV 100mV 20mVp-p 30mVp-p 0.015%/C 220F 430kHz 7mA 35A 1.6V +85C 50ms +100C +125C 70C / W Output Power (%) Derating-Graph (Ambient Temperature) 120 100 80 60 40 30 20 0 -40 Ir=1.8uA typ. Safe Operating Area 0 25 50 Operating Temperature (C) 60 85 75 100 } Detailed Information see Application Notes chapter "MTBF" www.recom-international.com 04-April-2007 INNOLINE DC/DC-Converter Standard Application Circuit +Vin R-78Axx-1.0 SMD Series 1,2 R-78Axx-1.0 SMD 6 4,5 +Vout R1 R2 On/Off 10 3,7,8,9 -Vin -Vout 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. Characteristics Efficiency 100 75 50 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V 50 Ripple 25 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V Efficiency (%) 25 Ripple (mV) 5 Vin ( V ) 10 15 18 5 Vin ( V ) 10 15 18 Efficiency Vs Vin (Full Load) Ripple Vs Vin ( Full Load ) 100 75 50 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V 50 25 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V Efficiency (%) 25 Ripple (mV) 0.2 0.4 0.6 0.8 1.0 1.2 0.2 0.4 0.6 0.8 1.0 1.2 Output Current ( A ) Output Current ( A ) Efficiency Vs Load ( Vin=Max ) Ripple Vs Load ( Vin=Max ) 100 75 50 Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V 50 25 Efficiency (%) 25 Ripple (mV) Vo=5V Vo=3.3V Vo=2.5V Vo=1.8V 0.2 0.4 0.6 0.8 1.0 1.2 0.2 0.4 0.6 0.8 1.0 1.2 Output Current ( A ) Output Current ( A ) Efficiency Vs Load ( Vin=Min ) Ripple Vs Load ( Vin=Min ) 152 04-April-2007 www.recom-international.com INNOLINE Application Examples DC/DC-Converter R-78Axx-1.0 SMD Series R-78A3.3-1.0SMD Vout = 3.3V or 5.0V @ 1A 3.3V/5V Selectable 1A Power Supply +Vin On/Off -Vin 3.3V/5V Select (TTL) 6.8kW Com 4.7kW REC10-4812SRWZ/H +Vin +12V@0.1A Z1 C1 -Vin R-78A5.0-1.0 R1 On/Off +5V@1A C2 C3 0V C3,C4 : optional - 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 R-78A3.3-1.0 On/Off +3.3V@1A C4 0V www.recom-international.com 04-April-2007 153 INNOLINE DC/DC-Converter Table 1: Adjustment Resistor Values 1.0Adc Vout (nom.) Vout (adj) 1.5 (V) 1.8 (V) 2.5 (V) 3.0 (V) 3.3 (V) 3.6 (V) 3.9 (V) 4.5 (V) 4.9 (V) 5.0 (V) 5.1 (V) 5.5 (V) 12K 4.7K 2.7K R1 3K R-78A1.8-1.0SMD 1.8Vdc R2 R1 200 12K R-78A2.5-1.0SMD 2.5Vdc R2 R-78Axx-1.0 SMD Series R-78A3.3-1.0SMD 3.3Vdc R1 R2 R1 R-78A5.0-1.0SMD 5.0Vdc R2 770 21K 50K 29K 19.4K 14k 8k 69K 30.5K 12.1k 7.k6 6.8k 6.2k 4k 540k 71k 88.4K 5.6K 17K 27K 42K 58K 180K 850K Package Style and Pinning (mm) 3rd angle projection SMD 10Pin Package 15.24 14.84 7.05 1.65 9.00 2.54x4 8.60 10.00 11.80 9.30 9.00 10 9 8 7 6 RECOM R-78Axx-1.0SMD xxxx 12345 Pin Connections 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 Recommended Footprint Details 0.55 Bottom View 13.00 1.20 10 9 8 7 6 Top View 12 34 5 1.80 2.54 1.20 154 04-April-2007 www.recom-international.com |
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