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PCA9421 Datasheet(PDF) 9 Page - NXP Semiconductors |
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PCA9421 Datasheet(HTML) 9 Page - NXP Semiconductors |
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9 / 66 page  NXP Semiconductors PCA9421 Power management IC for low-power microcontroller applications 8 Functional description 8.1 Power control state diagram aaa-049421 ON long press debounce done Initial powerup OR ASYS_UVLO deasserted Software Reset (I2C) MODE_0 (default) MODE_1 MODE_3 ON states NO POWER DEFAULT REGUL ATOR POWERUP SEQUENCE MODE_2 INTERNAL PMIC INIT STANDBY REGULATOR POWERDOWN SEQUENCE PWR_DN_EN=1 ON falling edge PROGRAMMED REGULATOR POWERUP SEQUENCE THERM_SHDN Thermal shutdown from any state or sequence overtemp condition deasserted ON falling edge AND ON_CFG_*=0 REGULATOR SHUTDOWN Watchdog timer expired REGULATOR SHUTDOWN REGULATOR SHUTDOWN 20 ms discharge 20 ms discharge Figure 6. Power control state diagram PCA9421 All information provided in this document is subject to legal disclaimers. © 2023 NXP B.V. All rights reserved. Product data sheet Rev. 1.0 — 16 October 2023 9 / 66 |
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