AXP209 IC – Enhanced Single Cell Li-Battery And Power System Management IC – QFN-68

The AXP209 IC is a versatile power system management IC designed for single-cell lithium-ion battery applications. It integrates multiple functions including battery charging, voltage regulation, power sequencing, ADC monitoring, and system control. It is widely used in embedded and IoT systems where space efficiency and robust power delivery are essential.

At its core, the AXP209 IC combines multiple essential power functions into one chip, simplifying circuit design and saving valuable board space. It integrates an adaptive USB-compatible PWM battery charger, two high-efficiency Buck DC-DC converters, five low-dropout linear regulators (LDOs), and multi-channel 12-bit ADCs for precise voltage, current, and temperature monitoring. It also includes four configurable GPIOs that offer additional control flexibility for system designers.

The AXP209 IC provides a small, simple solution for obtaining power from three different power sources single-cell Li-Ion battery, USB port, and AC-adapter. It can also support a rechargeable backup battery too.

Key Features:

• Integrated Power Management:
  • 2x Buck DC-DC converters
  • 5x LDO (Linear Regulators)
  • Adaptive USB-compatible PWM Charger
  • Intelligent Power Select (IPS™) for seamless power distribution
  • Flexible Power Sources
  • Supports USB, AC-adapter, Li-ion battery, and optional backup battery
  • Operates even without a battery (ideal for deep discharge or defective cell scenarios)
• Advanced Monitoring & Protection:
  • Multi-channel 12-bit ADC for voltage, current, temperature sensing
  • Over-Voltage (OVP), Under-Voltage (UVP), Over-Temperature (OTP), and Over-Current (OCP) protection
  • Fuel Gauge support with 1% bias resistor accuracy
• Control Interface:
  • Two Wire Serial Interface (TWSI/I²C)
  • 4 configurable GPIOs for system flexibility
• Package: QFN-68, compact and thermally efficient