PCA9420 datasheet(3/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

5 Simplified block diagram

aaa-033067

Max 315mA

Linear Charger

OVP

Detection

(5.5V default or

6V over I2C)

PCA9420

Main

Control

Blocks

VIN

ASYS

VBAT

1-Cell

Li-Ion

Battery

+ (VBAT)

- (GND)

STEP-DOWN

CONVERTER 1

250mA

(0.5V-1.5V

in 25mV steps

& fixed 1.8V)

STEP-DOWN

CONVERTER 2

500mA

(1.5V-2.1V in

25mV steps)

(or 2.7V-3.3V

in 25mV steps)

PSYS1

4.7µF/

10V

PGND1

LX1

ASYS

2.2µH

SW1_OUT

50Ω

PSYS2

PGND2

LX2

2.2µH

SW2_OUT

I2C

1µF/

10V

50Ω

VDDCORE

RT600

LDO1

1mA

(1.7V-1.9V

in 25mV steps)

LDO2

250mA

(1.5V-2.1V in

25mV steps)

(or 2.7V-3.3V

in 25mV steps)

LDO1_OUT

50Ω

LDO2_OUT

50Ω

ASYS

VBAT_BKUP

ASYS

VIN_

UVLO

Thermal

shutdown

OFF

Debounce

Filter

(200µs)

On-Key

1MΩ

2.5V

or VBAT

Long-Key

Debounce

Filter

(4s, 8s(default)

,12s,16s)

2.2µF/

10V

2.9V,3.1V(default),

3.3V,3.5V

200mV

ASYS_

Pre-

warning

3.3V,3.4V,

3.5V (default),3.6V

100mV

ASYS_

UVLO

100mV

AGND1 AGND2

1µF/

10V

10µF/

6.3V

2.2µF/

10V

10µF/

6.3V

VBAT

0.47µF/

6.3V

Coin

battery

Power-on

from off or

ship-mode

2.4V,2.5V, 2.6V,

2.7V (default)

Recycle

Power rails

VBAT_

BKUP_

UVLO

1.9V

100mV

Watchdog

(disable, 16s,

32s, 64s)

SCL

SDA

NTC

Control

Block

Up to 1MHz

I2C Interface

VDD_AO1V8

Option

ADC

MODE

SELECTION

MODESEL0

MODESEL1

AGND3

1µF/

6.3V

2.2µF/

6.3V

10nF

6.3V

10nF

6.3V

Power-Good

Reset

SYSRSTn

Interrupts

INTB

R1=R2=20kΩ to 220kΩ

PMIC_IRQN

(VDD_AO1V8)

20°C

TDIE

Thermal

Regulation

(80°C to

115°C)

ASYS

3-bit

programmable

(95°C to 125°C

in 5°C steps)

Thermal

warning

20°C

TDIE

2-bit

programmable

(75°C to 90°C

in 5°C steps)

50µA

5µA

25-Bump WLCSP, 0.4mm pitch,

2.09mm x 2.09mm

ASYS

I2C

SHIP

MODE

ENTER

SHIP_EN_x=1

EXIT

Valid VIN

SHIP_WKUP_CFG=0

Battery

absence

detection

I2C

A programmed

ICHG_CC

Power-down

sequence

PWR_DN_EN=1

β selction

3-bit programmable

From 3434k to 4750k

Add 1.2V

offset

I2C

Add 1.2V

offset

Default:1.0V

Default:1.8V VDDIO_1,2,3,

and/or 4

Always-on

1.8V

Default:

3.3V

Reverse

Blocking

Note: All directions for the arrows in the schematic are

made from the PCA9420 perspective.

Short on PCB

i.MXRT*

RT600

i.MXRT*

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 power

RESETN

(VDD_AO1V8)

PMIC_MODE0

(VDD_AO1V8)

PMIC_MODE1

(VDD_AO1V8)

Option: can be remove if an

internal pull-up R is available

on i.MXRT* device

VDDIO_1

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)

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.

VIN ≤ 6V

Figure 1. Simplified block diagram

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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