Ultra Low Iq PMIC

Optimized for wearable applications

OS1000 is the most advanced power management IC in its class and is designed for wearable applications that require efficient and low quiescent current operation. OS1000 contains a linear Li+ battery charge management block, two low quiescent buck regulators and 2 low quiescent low dropout linear regulators. The linear battery charger supports power path, JEITA thermal safety monitoring, step charge profiles and multiple safety timers. The buck converters support DVS modes through either I2C communication or dedicated pins to switch between voltages.

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OS1000 contains support functions including an extremely low current off or “shelf” mode, support for a power button and 4 GPIO pins which can be assigned alternate functions. OS1000 also contains an 8bit ADC to allow the system to directly read the battery thermistor value and a “direct mode” which is used during customer system testing.

Features

• Linear battery Charger and SYS output

  • -5.5V to +20V protection

  • Charger input to SYS node up to 1A

  • Power Path – battery will supplement SYS if power source is current limited

  • 5mA to 500mA max battery charge current

  • Battery regulation voltage up to 4.65V adjustable in 5mV increments to ±0.5% accuracy

  • Step charge function: reduced max charge current as battery nears regulation voltage

  • Battery removal detection

  • Shared thermistor allowing system to read battery temperature

  • JEITA battery safety with fully adjustable temperature thresholds

  • Multiple safety timers to eliminate overcharging

• General Features

  • Shelf Mode to reduce battery current draw below 100nA

  • Programmable power up sequencer

  • User configurable GPIO pins with alternate functions

  • Push button monitor with long press system reset function

  • Direct Mode to bypass charger during system testing