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ACT8870QJ-T Datasheet(PDF) 6 Page - Active-Semi, Inc |
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ACT8870QJ-T Datasheet(HTML) 6 Page - Active-Semi, Inc |
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6 / 43 page  ACT8870QJ-T Rev 3.0, 02-Oct-2017 Innovative PowerTM www.active-semi.com ActiveSwitcherTM is a trademark of Active-Semi. Copyright © 2016-2017 Active-Semi, Inc. I2CTM is a trademark of NXP 6 PIN DESCRIPTIONS - QFN PIN NAME DESCRIPTION 1 IRQ Interrupt IRQ Open Drain Output indicates a fault occurred. 2,3 PGND1 Dedicated Power Ground for BUCK1 Regulator. 4 POK Power OK Open Drain Output, indicates Overvoltage or Undervoltage on VIN input supply. 5 PGND2 Dedicated Power Ground for Buck 2 Regulator. 6 SW_B2 Switch Pin for BUCK2 Regulator. 7 VIN_B2 Dedicated VIN power input for BUCK2 Regulator. 8 FB_B2 Feedback for BUCK2 Regulator. Connect to the BUCK2 output. 9 OUT_LDO1 Output for LDO1 Regulator (Leave unconnected if LDO1 is not used and disabled). 10 VIN_LDO1 Dedicated VIN power input for LDO1 Regulator. 11 nRESET_AUX2 Auxiliary nRESET configurable, Open Drain Output (configurable as an input). 12 nRESET_AUX1 Auxiliary nRESET configurable. Open Drain Output (configurable as an input). 13 SCL I2C Clock Input. 14 nRESET nRESET Open Drain Output. This pin is configurable. 15 SDA I2C Data Input and Output. 16 AGND Analog Ground. 17 PWREN Power Enable Digital Input. This pin is configurable. 18 EXT_EN External Regulator Enable Push-Pull Digital Output. 19 EXT_PG External Power Good Digital Input. This pin is configurable. 20 VIO_IN Digital Input Reference Voltage Input. Connect a 0.1uF ceramic capacitor between VIN_IN and AGND 21 OUT_LDO2 Output for LDO2 Regulator (Leave unconnected if LDO2 is not used and disabled). 22 VIN_LDO23 Dedicated VIN power input for LDO2 and LDO3 Regulator. 23 OUT_LDO3 Output for LDO3 Regulator (Leave unconnected if LDO3 is not used and disabled). 24 FB_B3 Feedback for BUCK3 Regulator. Connect to the BUCK3 output. 25 VIN_B3 Dedicated VIN power input for BUCK3 Regulator. 26 SW_B3 Switch Pin for BUCK3 Regulator. 27 PGND3 Dedicated Power Ground for BUCK3 Regulator. 28 PGND4 Dedicated Power Ground for BUCK4 Regulator. 29 FB_B4 Feedback for BUCK4 Regulator. Connect to the BUCK4 output. 30 MODE Configuration input pin. This pin is read at power up to configure BUCK1. 31 SW_B4 Switch Pin for BUCK4 Regulator. 32 VIN_B4 Dedicated VIN power input for BUCK4 Regulator. 33 GPIO Configurable General purpose input/open drain output. 34 PG Power Good Output. This pin is configurable. Open Drain Output. 35 FB_B1 Feedback for BUCK1 Regulator. Connect to the BUCK1 output. 36 VIN Analog Input supply monitored by POK thresholds. 37,38 VIN_B1 Dedicated VIN power input for BUCK1 Regulator. 39,40 SW_B1 Switch pin for BUCK1 Regulator. Exposed Pad Tie to Ground Plane for best performance |
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