PCA9420 datasheet(48/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

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 45. SW1 output voltage for Mode Setting 0...continued

9.5.29 Mode configuration mode setting 0_1 (MODECFG_0_1, address 23h)

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

WRITE register.

Bit

Symbol

Default value Type

Function

RSVD

R/W

Reserved bit

ON_CFG_0

R/W

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

Mode Setting 0:

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

will switch 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_0_OFFSET

R/W

SW2 output voltage offset selection in mode setting 0

0: SW2 Output Voltage = SW2_OUT_0_LSB [4:0] + 0 V

1: SW2 Output Voltage = SW2_OUT_0_LSB [4:0] + 1.2 V

SW2_OUT_0_LSB

[4:0]

01100

R/W

SW2 default output voltage for mode setting 0 (see below).

Note: The default value for SW2_OUT_A_LSB [4:0] is set

at 1.8 V, but it should be MTP programmable.

Table 46. MODECFG_0_1 register bit description

00000=1.500 V

01001=1.725 V

10010=1.950 V

00001=1.525 V

01010=1.750 V

10011=1.975 V

00010=1.550 V

01011=1.775 V

10100=2.000 V

00011=1.575 V

01100=1.800 V

(default)

10101=2.025 V

00100=1.600 V

01101=1.825 V

10110=2.050 V

00101=1.625 V

01110=1.850 V

10111=2.075 V

00110=1.650 V

01111=1.875 V

11000=2.100 V

Table 47. SW2 default output voltage for mode setting 0

PCA9420

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Product data sheet

Rev. 4.0 — 28 November 2022

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