PCA9420 datasheet(65/87 Pages) NXP

65 / 87 page

NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TWD_TIMER Range

Watchdog Timer

When enabled via

I2C Programming

-15%

Disable

+15%

TCHG_PREQ

Pre-qualification Charging

Safety Timer Range

I2C Programmable,

15 min/step

Note:

When under

thermal fold- back

status, the timer

will extend by 2x

automatically

-15%

+15%

min

TCHG_FAST

Fast (CC and CV) Charging

Safety Timer Range

I2C Programmable,

2hr/step

Note:

When under

thermal fold- back

status, the timer

will extend by 2x

automatically

-15%

+15%

hrs

POWER UP/DOWN SEQUENCE TIMING[1]

TPWUP_DLY_INI

Power up Initial delay

Time from ON signal

asserts to the first

output rail reaches

90 % of its nominal

value

TPWDN_DLY_INTERVAL

Power down interval delay

Delay between

power rail

TPWUP_DLY_INTERVAL

Power up interval delay

For power-up: this

is the time from

previous voltage

rail reaches 90 % of

its nominal value to

the time when the

following voltage

rail reaches its 90 %

nominal value

For power-down:

this is the time

from the previous

voltage rail starts

falling to the time the

following rail starts

falling

Table 80. EC table for Top level...continued

[1]

Guaranteed by design and characterization; not tested in production.

PCA9420

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4.0 — 28 November 2022

65 / 87

PCA9420 Datasheet(PDF) 65 Page - NXP Semiconductors

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