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ADP5140WACCZ-R7 数据表(PDF) 58 Page - Analog Devices |
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ADP5140WACCZ-R7 数据表(HTML) 58 Page - Analog Devices |
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58 / 128 page  ADP5140 Data Sheet Rev. 0 | Page 58 of 128 RDSON_SYNC is the sync MOSFET on resistance. RL is the series resistance of output inductor. The minimum input voltage of the boost regulator for a given output voltage and switching frequency is constrained by the minimum off time of the boost regulator and can be calculated using the following equation: VIN_MIN = VOUT × tMIN_OFF × fSW + IOUT_MAX × (RDSON_MAIN × tMIN_OFF × fSW + RL + (1 − tMIN_OFF × fSW) × RDSON_SYNC)/ (tMIN_OFF × fSW) where: VIN_MIN is the minimum input voltage. tMIN_OFF is the minimum off time. IOUT_MAX is the maximum output current. |
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