PCA9420 datasheet(53/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default value Type

Function

SW2_EN_1

R/W

SW2 Enable Control in mode setting 1:

0: SW2 disabled

1: SW2 enabled

LDO1_EN_1

R/W

LDO1 Enable Control in mode setting 1:

0: LDO1 disabled

1: LDO1 enabled

LDO2_EN_1

R/W

LDO2 Enable Control in mode setting 1:

0: LDO2 disabled

1: LDO2 enabled

Table 56. MODECFG_1_2 register bit description...continued

0000: 1.700 V

0011: 1.775 V

0110: 1.850 V

1001 to 1111:1.9 V

0001: 1.725 V

0100: 1.800 V

(default)

0111: 1.875 V

0010: 1.750 V

0101: 1.825 V

1000: 1.900 V

Table 57. LDO1 default output voltage for mode setting 1

9.5.35 Mode configuration mode setting 1_3 (MODECFG_1_3, address 29h)

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

WRITE register.

Bit

Symbol

Default value Type

Function

WD_TIMER_1

[1:0]

R/W

Watchdog timer setting in mode setting 1:

00: Watchdog Timer Disabled

01: Watchdog Timer = 16 s

10: Watchdog Timer = 32 s

11: Watchdog Timer = 64 s

LDO2_OUT_1_OFFSET

R/W

LDO2 output voltage offset selection in mode setting 1:

0: LDO2 Output Voltage = LDO2_OUT_1_LSB[4:0] + 0 V

1: LDO2 Output Voltage = LDO2_OUT_1_LSB[4:0] + 1.2 V

LDO2_OUT_1_LSB

[4:0]

01100

R/W

LDO2 default output voltage for mode setting 1 (see below)

Table 58. MODECFG_1_3 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

Table 59. LDO2 default output voltage for mode setting 1

PCA9420

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Product data sheet

Rev. 4.0 — 28 November 2022

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