Data Sheet Negative DC/DC Converter (Non-isolated) BP5122 Absolute Maximum Ratings Dimensions (Unit : mm) Unit Vi Io 24 0.1 V A Operating temperature range Topr °C Storage temperature range Tstg °C 26.7MAX. 12.7MAX. Marked side Limits 19.5MAX. Symbol 4±1.0 Parameter Input voltage Output Current Marked side 1 2 3 4 5 6 7 9 0.25±0.05 4.45MAX. 0.5±0.1 1.3±0.2 2.54 8=20.32 3.25MAX. P=2.54±0.2 8.25MAX. Electrical Characteristics Derating Curve (Vi=15V, lo=0.05A, SW=1, Ta=25°C unless otherwise noted) Min. Typ. Max. Unit Parameter Symbol Vi 20 V Input voltage 8 Vo lo 0.1 V A 2 80 mV Load regulation 5 80 mV Output ripple voltage Power conversion efficiency 10 80 mVpp 0.01 Line regulation Switching Frequency 60 70 See Derating Curve. Vi=8V to 20VDC Output Current Io (mA) output voltage Rated output current Conditions 120 100 80 60 Operation Range 40 20 0 0 10 20 30 40 50 60 70 80 Ambient Temperature Ta(°C) lo=0.01A to 0.1A Conversion Efficiency % (Ta=25°C,Vi=15V) 100 fSW 250 kHz 80 60 40 20 0 Sample Application Circuit Use a 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. 20 40 60 80 100 Output Current Io(mA) Pin No. Terminal name 1 Output Terminal 2 GND 3 GND 4 GND 5 GND 6 GND 7 GND 8 Skip 9 Input Terminal Load Regulation Output Voltage Vo(V) FUSE 0 0 20 40 60 80 100 Output Current Io(mA) External Component Settings www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/1 2010.03 - Rev. B