PCA9420 | PMIC, Low power

Overview

The PCA9420 is a highly integrated Power Management IC (PMIC), targeted to provide power management solution for low-power microcontroller applications or other similar applications powered by Li-ion battery.

The device consists of a linear battery charger capable of charging up to 315 mA current with I²C programmable Constant Current (CC) and Constant Voltage (CV) values. The device also integrates 2x buck converters, 2x LDOs with programmable output voltage.

The chip is offered in 2.09mm x 2.09mm, 5 x 5 bump, 0.4mm pitch WLCSP package; and 3mm x 3mm, 24-pin QFN package.

Features

Optimized for low-power applications

Typical 100 nA quiescent current in ship mode
Small total solution size

Built-in “Mode” configuration to accommodate fast mode switch supporting different MCU operation modes

Linear battery charger for charging single-cell Li-ion battery

20 V tolerance on VIN pin
Programmable constant current (up to 315 mA) and precharge low voltage current threshold
Programmable constant voltage regulation
Built-in protection features such as input OVP, battery SCP, thermal protection
JEITA compliant
Battery attached detection

Over-temperature protection

Two step-down DC-DC (Buck) converters

Programmable output voltage
SW1: core buck converter, 0.5 V ~ 1.5 V output, 25 mV/step, and a fixed 1.8 V, up to 250 mA
SW2: system buck converter, 1.5 V ~ 2.1 V/2.7 V ~ 3.3 V output, 25 mV/step, up to 500 mA
Low-power mode for extra power saving

Two LDOs

Programmable output voltage regulation
LDO1: always-on LDO, 1.70 V ~ 1.90 V output, 25 mV/step, up to 1 mA
LDO2: system LDO, 1.5 V ~ 2.1 V/2.7 V ~ 3.3 V output, 25 mV/step, up to 250 mA

1 MHz I²C-bus slave interface

Offered in two package options

2.09 mm x 2.09 mm, 5 x 5 bump, 0.4 mm pitch WLCSP
3 mm x 3 mm, 24-pin QFN

-40 °C ~ +85 °C ambient temperature range