BQ25120AYFPR Power Path Management IC Battery Management 700nA Low Iq Highly Integrated Battery

1 Features

• Increases System Operation Time Between Charges

• – Configurable 300-mA Buck Regulator (1.8-V Default)

• – 700 nA (typical) Iq with Buck Converter Enabled (No Load)

• – Configurable Load Switch or 100mA LDO Output (Load Switch by Default)

• – Up to 300-mA Charge Current for Fast Charging

• – 0.5% Accurate Battery Voltage Regulation (Configurable from 3.6 V to 4.65 V in 10-mV Steps)

• – Configurable Termination Current Down to 500 μA

• – Simple Voltage Based Battery Monitor

• Highly Integrated Solution with Small Footprint

  • – 2.5 mm x 2.5 mm WCSP Package and 6 External Components for Minimal Solution

  • – Push-Button Wake-Up and Reset with Adjustable Timers

  • – Power Path Management for Powering the System and Charging the Battery

  • – Power Path Management enables <50 nA Ship Mode Battery Quiescent Current for Longest Shelf Life

  • – Battery Charger Operates from 3.4 V – 5.5 VIN (5.5-V OVP / 20-V Tolerant)

  • – Dedicated Pins for Input Current Limit, Charge Current, Termination Current, and Status Output

• I2C Communication Control

  • – Charge Voltage and Current

  • – Termination Threshold

  • – Input Current Limit

  • – VINDPM Threshold

  • – Timer Options

  • – Load Switch Control

  • – Controls for Interrupts for Faults and Status

  • – System Output Voltage Adjustment

  • – LDO Output Voltage Adjustment

2 Applications

• Smart Watches and other Wearable Devices

• Fitness Accessories
• Health Monitoring Medical Accessories
• Rechargeable Toys

3 Description

The bq25120A is a highly integrated battery charge management IC that integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The integrated buck converter is a high efficiency, low IQ switcher using DCS control that extends light load efficiency down to 10-μA load currents. The low quiescent current during operation and shutdown enables maximum battery life. The device supports charge currents from 5 mA to 300 mA. The input current limit, charge current, buck converter output voltage, LDO output voltage, and other parameters are programmable through the I2C interface.

Device Information