BP5226-18

Data Sheet 18V/500mA Output Step-down DC/DC Converter(Non-isolated) BP5226-18 Absolute Maximum Ratings Parameter Input voltage Operating temperature range Storage temperature range Maximum surface temperature Maximum output current Symbol Vi Topr Tstg Dimensions (Unit :mm) Limits Unit V Conditions DC Refer to derating curve (Ambient temperature + the module self-heating) Tcmax °C °C °C mApk Tcmax Iomax Electrical Characteristics Symbol Parameter Input voltage range Output voltage Output current Line regulation Load regulation Output ripple voltage CTL pin OFF voltage CTL pin ON voltage CTL terminal pull-up resistance Power conversion efficiency Min. Typ. Max. Unit Conditions DC Vi=34V, Io=500mA Vi=34V Vi=20 to 46V, Io=500mA Vi=34V, Io=0 to 500mA Vi=34V, Io=500mA SW1 OFF (VoOFF) SW1 ON (VoON) Vi=34V, Io=500mA Derating Curve 600 Output Current Io(mA) 500 400 300 200 100 0 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Ambient Temperature Ta(°C) Operation Range Derating Curve Conversion Efficiency 100 80 60 Conversion Efficiency (Ta=25°C, Vi=34V) Application Circuit BP5226-18 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Function Output terminal:Vo(18V) CTL terminal Power inductor terminal Skip Power inductor terminal Skip COMMON Skip Skip Input terminal N.C. Input terminal 40 20 0 0 100 200 300 400 Output Current Io(mA) 500 1211 10 7 5 321 Io Load Regulation 20.0 18.0 16.0 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0 Load Regulation (Ta=25°C, Vi=12V) Output Voltage Vo(V) AC24V D1 FUSE L1 Ctl C1 C2 Vo Be sure to use fuse for safety. Please verify operation and characteristics in the customer's circuit before actual usage. Ensure that the load current does not exceed the maximum rating. Input terminal is 10 and 12. External Component Specifications FUSE: fuse C1: Input capacitor C2: Output capacitor L1: Power inductor D1: Diode Above 60V, current:above 1.0A Use a quick-acting fuse (1.8A) 0 100 200 300 400 500 600 700 800 Output Current Io(mA) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/1 2010.03 - Rev. B