MAX77816 Datasheet

• Buck and Boost Operation Including Seamless Transition between Buck and Boost Modes
  • 2.3V to 5.5V V_IN Range
  • 2.60V to 5.14V V_OUT with 20mV Step
  • 3A Minimum Continuous Output Current (V_INBB ≥ 3.0V, V_OUTBB = 3.3V)
  • Burst Current: 3.6A Minimum Output Current for 800μs (V_INBB ≥ 3.0V, V_OUTBB = 3.3V)
• I²C Serial Interface Allows Dynamic V_OUT Adjustment and Provides Design Flexibility
• 97.5% Peak Efficiency
• 40µA Quiescent Current
• Safety Features Enhance Device and System Reliability
  • Soft-Start
  • True Shutdown^™
  • Thermal Shutdown and Short-Circuit Protection
• Multifunction GPIO Pin
  • MAX77816A/F: FPWM Mode Enable
  • MAX77816B: Inductor Peak Current-Limit selection
  • MAX77816C: Output Voltage Selection
  • MAX77816D: Power-OK indicator
  • MAX77816E: Interrupt Indicator
• Small Size: 1.827mm × 2.127mm, 20-Bump WLP, 0.4mm Pitch

• Battery-Powered Applications
• RF Power Amplifiers
• Smartphones and Tablets
• Wearable Devices
• Wireless Communication Devices

The MAX77816 is a high-current, high-efficiency buck-boost regulator targeting single-cell Li-ion battery-powered applications. It supports a wide output voltage range from 2.60V to 5.14V. The IC allows 5A (TYP) maximum switch current. In buck mode, the output current can go as high as 4A, and in boost mode, the maximum output current can be 3A. A unique control algorithm allows high efficiency, outstanding line/load transient response, and seamless transition between buck and boost modes.

The IC features I²C-compatible serial interface. The I²C interface allows the output voltage to be dynamically adjusted thus enabling finer control of system power consumption. The I²C interface also provides features such as enable control and device status monitoring.

The multifunction GPIO pin is register settable to 5 different options such as FPWM mode enable and inductor peak current level selection. These options provide design flexibility that allows the IC to cover a wide range of applications and use cases.