BP5226-18 Step-down DC/DC converter 18V/500mA output type Dimensions(Unit : mm) Absolute Maximum Ratings Unit Parameter Input voltage Operating temperature range Storage temperature range Symbol VIN Topr Tstg °C °C Maximum surface temperature Tcmax °C Maximum output current Iomax mApk Limits V Conditions DC Refer to derating curve (Ambient temperature + the module self-heating) Tcmax Electrical Characteristics 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) Derating Curve Derating Curve 600 Output Current Io(mA) Symbol Min. Parameter 20 Input voltage range 17.0 Output voltage 0 Output current − Line regulation − Load regulation − Output ripple voltage 3.1 CTL pin OFF voltage − CTL pin ON voltage 135 CTL terminal pull-up resistance 85 Power conversion efficiency 500 400 300 Operation Range 200 100 0 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Ambient Temperature Ta(°C) Conversion Efficiency Vi=34V, Io=500mA 100 Conversion Efficiency (Ta=25°C, Vi=34V) 80 60 Application circuit 40 BP5226-18 1211 10 7 5 321 Io FUSE AC24V L1 D1 Ctl C2 Vo Function Output terminal:Vo(18V) CTL terminal Power inductor terminal Skip Power inductor terminal Skip COMMON Skip Skip Input terminal N.C. Input terminal C1 Be sure to use fuse for safety. For actual usage, Please kindly evaluate and confirm our part mounted in your product, Especially, Please make sure to confirm the load current does not exceed Max. rated current by using the current probe. Input terminal is 10 and 12. External components setting FUSE: fuse Please make sure to use quick acting (1.8A) C1: Input capacitor C2: Output capacitor Above 25V, 100µF to 1000µF, Low impedance L1: Power inductor D1: Diode Above 60V, current:above 1.0A 20 0 0 100 200 300 400 Output Current Io(mA) 500 Load Regulation Output Voltage Vo(V) BP5226-18 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 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) 0 100 200 300 400 500 600 700 800 Output Current Io(mA) Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.1