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SP1937S25RG Datasheet(PDF) 4 Page - SYNC POWER Crop. |
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SP1937S25RG Datasheet(HTML) 4 Page - SYNC POWER Crop. |
4 / 10 page 2007/07/10 Ver.3 Page 4 SP1937 DC-DC Step-Up Converter for White LED ELECTRICAL CHARACTERISTICS (TA=25 , V ℃ IN =3V, VSHDN=3V, Unless otherwise specified) Parameter Conditions Min. Typ. Max. Unit Operating Voltage 2.5 20.0 V Feedback Voltage ISW=100mA, Duty Cycle = 66% 86 110 mV FB Pin Bias Current 150 nA 2.8 3.5 mA Supply Current VSHDN = 0V 0.1 1.0 μA Switching Frequency 0.8 1.2 1.6 MHz Maximum Duty Cycle 85 % Switch Current Limit 320 mA Switch Leakage Current VSW= 5V 0.01 5 μA Switch Vcesat ISW = 200mA 150 mV SHDN Voltage High 1.5 V SHDN Voltage Low 0.4 V SHDN Pin Bias Current 90 uA |
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