PMIC for Low Power Applications

PCA9420

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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 2.09 mm x 2.09 mm, 5 x 5 bump, 0.4 mm pitch WLCSP package; and 3 mm x 3 mm, 24-pin QFN package.

Product Details

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Block Diagram

PCA9420 Block diagram

PCA9420 Block diagram
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Features

General 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

Battery Charger

  • 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

Temperature

  • Over-temperature protection
  • -40 °C ~ +85 °C ambient temperature range

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

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

Interface

  • 1 MHz I2C-bus target interface

Package

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

Key Parametrics

  • MCU Supported
    i.MX RT
  • Output Current (A)
    0.5
  • Number of Buck Regulators
    2
  • Number of LDO
    2
  • Interface and Input Control
    I2C

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