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ACT88320QI-T Datasheet(PDF) 48 Page - Active-Semi, Inc |
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ACT88320QI-T Datasheet(HTML) 48 Page - Active-Semi, Inc |
48 / 50 page ACT88320QI-T Rev 2.0, 20-Dec-2017 Innovative PowerTM www.active-semi.com ActiveSwitcherTM is a trademark of Active-Semi. Copyright © 2017 Active-Semi, Inc 48 Startup Buck3 VIN LDO1 Buck1 0.5ms LDO2 CMI 108 Startup nRESET 20ms 0.5ms 0.5ms GPIO1 (pin 13) - nRESET GPIO1 is configured as an open drain nRESET. nRESET goes open drain 20ms after Buck3 goes into regulation. GPIO2 (pin 14) – EXT_EN GPIO2 is configured as an open drain EXT_EN. EXT_EN goes high 2.5ms after Buck2 goes into regulation. EXT_EN can be used to sequence an external supply. GPIO3 (pin 12) – nIRQ GPIO3 is configured as an open drain nIRQ. GPIO4 (pin 11) – DVS GPIO4 is configured as a DVS input. Pulling the DVS input high makes the ACT88320 operate in Active mode with normal output voltages. In Active mode, the buck converters operate with voltages set by their I2C VSET0 registers. Pulling the DVS input low makes the IC operate in DVS mode. In DVS mode, the buck converters operate with voltages set by their VSET1 registers. SLEEP MODE I2C default settings are SLEEP_MODE=1, SLEEP_EN=0, and SLEEP=0. Refer to the SLEEP State paragraph for details on how to enter SLEEP Mode. DPSLP MODE I2C default settings are DPSLP_MODE=1, DPSLP_EN=0, and DPSLP=0. Refer to the DPSLP State paragraph for details on how to enter SLEEP Mode. VSYSMON VSYSMON = 3.0V Buck1 Voltage Setting Buck 1 reference voltage is 0.8V. This sets the allowable voltage range between 0.8V and 3.998V in 12.5mV steps. LDO Voltage Setting The LDO reference voltage is 0.8V. This sets the allowable voltage range between 0.8V and 3.998V in 12.5mV steps. |
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