PCA9420BS datasheet(56/85 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

000000=0.500 V

001110=0.850 V

011100=1.200 V

(default)

000001=0.525 V

001111=0.875 V

011101=1.225 V

000010=0.550 V

010000=0.900 V

011110=1.250 V

000011=0.575 V

010001=0.925 V

011111=1.275 V

000100=0.600 V

010010=0.950 V

100000=1.300 V

000101=0.625 V

010011=0.975 V

100001=1.325 V

000110=0.650 V

010100=1.000 V

100010=1.350 V

000111=0.675 V

010101=1.025 V

100011=1.375 V

001000=0.700 V

010110=1.050 V

100100=1.400 V

001001=0.725 V

010111=1.075 V

100101=1.425 V

001010=0.750 V

011000=1.100 V

100110=1.450 V

001011=0.775 V

011001=1.125 V

100111=1.475 V

001100=0.800 V

011010=1.150 V

101000=1.500 V

001101=0.825 V

011011=1.175 V

101001 to 111110 = 1.5 V

111111 = 1.8 V

Table 69. SW1 output voltage for mode setting 3

9.5.41 Mode configuration mode setting 3_1 (MODECFG_3_1, address 2Fh)

This register contains mode setting 3, part 1 configuration register. This is a READ AND WRITE register.

Bit

Symbol

Default value Type

Function

RSVD

R/W

Reserved bit

ON_CFG_3

R/W

Mode configuration upon falling edge applied on “ON” pin in

mode setting 3

0: upon valid falling edge applied on “ON” pin, the device

switches back to mode 0 setting (if the device is currently

operating in mode 0 setting, then no mode switch)

1: upon valid falling edge applied on “ON” pin, no mode

switch, the device stays in its current mode setting operation

SW2_OUT_3_OFFSET

R/W

SW2 output voltage offset selection in mode setting 3

0: SW2 Output Voltage = SW2_OUT_3_LSB[4:0] + 0 V

1: SW2 Output Voltage = SW2_OUT_3_LSB[4:0] + 1.2 V

SW2_OUT_3_LSB

[4:0]

01100

R/W

SW2 default output voltage for mode setting 3 (see below).

Table 70. MODECFG_3_1 register bit description

00000=1.500 V

01001=1.725 V

10010=1.950 V

Table 71. SW2 default output voltage for mode setting 3

PCA9420

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

Product data sheet

Rev. 4.2 — 26 July 2023

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