PCA9420 datasheet(7/87 Pages) NXP

7 / 87 page

NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

7 System configuration diagram

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PCA9420

VIN

ASYS

VBAT

1-Cell

Li-Ion

Battery

+ (VBAT)

- (GND)

PSYS1

4.7µF/

10V

PGND1

LX1

2.2µH

SW1_OUT

PSYS2

PGND2

LX2

2.2µH

SW2_OUT

1µF/

10V

VDDCORE

LDO1_OUT

LDO2_OUT

VBAT_BKUP

OFF

On-Key

button

2.2µF/

10V

AGND1 AGND2

1µF/

10V

10µF/

6.3V

2.2µF/

10V

10µF/

6.3V

VBAT

0.47µF/

6.3V

Coin

battery

SCL

SDA

NTC

VDD_AO1V8

Option

ADC

MODESEL0

MODESEL1

AGND3

1µF/

6.3V

2.2µF/

6.3V

SYSRSTn

INTB

R1=R2=100-220kΩ

PMIC_IRQN

(VDD_AO1V8)

25-Bump WLCSP, 0.4mm pitch,

2.1mm x 2.1mm

ASYS

Default:1.0V

Default:1.8V VDDIO_1,2,3,

and/or 4

Always-on

1.8V

Default:

3.3V

Note: All directions for the arrows in the

schematic are made from the PCA9420

perspective.

Short on PCB

i.MXRT

RT5xx

RT6xx

VDD1V8 and

other 1.8V power

PMIC_I2C_SCL

(VDDIO_1)

PMIC_I2C_SDA

(VDDIO_1)

VDD_AO1V8

VDDIO_1,2,3,

and/or 4

USB1_VDD3V3

and other

3V.3V power

RESETN

(VDD_AO1V8)

PMIC_MODE0

(VDD_AO1V8)

PMIC_MODE1

(VDD_AO1V8)

Option: can be removed if an

internal pull-up R is available

on i.MXRT* device

VDDIO_1

Input Supply

VBUS

GND

If a coil cell is not used, tie

with the VBAT power domain

If the pin is not used,

leave the pin open

If the pin is not used,

leave the pin open

If the pin is not used,

leave the pin open

MODESEL1 MODESEL0

EN_MODE_SEL_BY_PIN_x=1

Output Voltage Setting

LOW (0)

HIGH (1)

LOW (0)

HIGH (1)

LOW (0)

HIGH (1)

Mode Setting 0

Mode Setting 1

Mode Setting 2

Mode Setting 3

(x can be 0, 1, 2 or 3)

MODESEL1 MODESEL0

EN_MODE_SEL_BY_PIN_x=1

Output Voltage Setting

LOW (0)

HIGH (1)

LOW (0)

HIGH (1)

LOW (0)

HIGH (1)

Mode Setting 0

Mode Setting 1

Mode Setting 2

Mode Setting 3

(x can be 0, 1, 2 or 3)

Can be connected to any ADC

Regulator Default (V)* Output Range

BUCK1

1.0

(MTP)

0.5V to 1.5V and fixed 1.8V

BUCK2

LDO1

LDO2

1.5V to 2.1V or 2.7V to 3.3V

* : Regardless of mode setting

1.7V to 1.9V

1.5V to 2.1V or 2.7V to 3.3V

Resolution

25mV

Max Current

250mA

25mV

500mA

1mA

250mA

Linear charger: 0mA to 315mA in 5mA steps for charge current

Input Current Limit (typical): 85mA, 255mA, 425mA, 595mA, 765mA, 935mA,

1105mA, or disable

1.8

(MTP)

1.8

(MTP)

3.3

(MTP)

Regulator Default (V)* Output Range

BUCK1

1.0

(MTP)

0.5V to 1.5V and fixed 1.8V

BUCK2

LDO1

LDO2

1.5V to 2.1V or 2.7V to 3.3V

* : Regardless of mode setting

1.7V to 1.9V

1.5V to 2.1V or 2.7V to 3.3V

Resolution

25mV

Max Current

250mA

25mV

500mA

1mA

250mA

Linear charger: 0mA to 315mA in 5mA steps for charge current

1.8

(MTP)

1.8

(MTP)

3.3

(MTP)

VIN ≤ 6V

If VIN is greater than 6V, the voltage

rating on the capacitor of 2.2µF/10V

shall be changed to a higher

voltage than a maximum voltage

in applications.

i.MXRT

RT5xx

RT6xx

10nF/

6.3V

10nF/

6.3V

Figure 4. System configuration diagram; i.MXRT series

PCA9420

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

Product data sheet

Rev. 4.0 — 28 November 2022

7 / 87

PCA9420 Datasheet(PDF) 7 Page - NXP Semiconductors

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