PCA9420 datasheet(72/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

13.5 LDO1 (Always-on LDO)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIN_LDO1

Input voltage range

for Always- On LDO

Whichever is higher between VBAT_

BKUP and ASYS

2.0

5.5

IOUT_LDO1_MAX

Maximum Output

DC Current

IOUT_LDO1_LIMIT

Internal Current

Limit

LDO1_OUT = GND

1.4

3.3

7.0

VLDO1_OUT Range

LDO1 nominal

output voltage

I2C Programmable, 25 mV/step

1.700

1.900

VLDO1_OUT Accuracy

LDO1 Output

Voltage Accuracy

Over VIN_LDO1, I OUT= 0 to 1 mA

-3

ΔVLDO1_OUT / (VLDO1_

OUT(NOM) x ΔVIN_LDO1)

DC Line regulation VLDO1_OUT(NOM)+0.5 V < VIN_LDO1 <

5 V, I OUT= 1 mA

%/V

ΔVLDO1_OUT / (VLDO1_

OUT(NOM) x ΔV x ΔIOUT)

DC Load regulation 0 mA < I OUT < 1 mA

%/mA

Power Supply Rejection

Ratio (PSRR) [1]

IIN(LDO1)

Quiescent current

I OUT =0 mA

VDROPOUT(LDO1)[1] [2]

Dropout Voltage

I OUT=1 mA

200

RSTDN(LDO1)

LDO1 Output

Active Discharge

Resistance

Table 84. EC table for LDO1

[1]

Guaranteed by design and characterization; not tested in production.

[2]

Dropout voltage is defined as the input-to-output difference in the predefined load when the output is below 100 mV to the nominal regulation voltage.

PCA9420

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

Product data sheet

Rev. 4.0 — 28 November 2022

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