MAX77827

5.5V Input, 1.8A/3.1A Switch Buck-Boost Converter with 6μA IQ

High Efficiency, Low IQ Buck-Boost Converter


Please check latest availability status for a specific part variant.

Description

The MAX77827 is a high-efficiency buck-boost regulator targeted for one-cell Li-ion powered applications with the lowest typical quiescent current in the industry of 6μA. It supports input voltages of 1.8V to 5.5V and an output voltage range of 2.3V to 5.3V. The IC provides two different switching current levels (1.8A and 3.1A) to optimize external component sizing based on given load current requirements. With the 1.8A switching current-limit option, the IC can support up to 1.0A load current in buck mode and 900mA in boost mode (VIN = 3.0V, VOUT = 3.3V).
 
The peak efficiency of 96% makes the IC one of the best solutions as a DC/DC converter to supply a rail for battery-powered portable applications.

The IC features an adjustable output voltage, which can be programmed from 2.3V to 5.3V through a single resistor. Two GPIO pins are available to support force PWM enable function and power-OK (POK) indicator. A unique control algorithm allows high-efficiency, outstanding line/load transient response, and seamless transition between buck and boost modes. These options provide design flexibility that allow the IC to cover a wide range of applications and use cases while minimizing board space.
 
The MAX77827 is available in a 1.61mm x 2.01mm, 12-bump wafer-level package (WLP). 
MAX77827: TSimplified Block Diagram MAX77827: Simplified Block Diagram Enlarge+

Key Features

  • 1.8V to 5.5V Input Voltage Range
  • 2.3V to 5.3V Single Resistor Adjustable Output Voltage
  • 1.6A Maximum Output Current (3.1A ILIM Option, Buck Mode)
  • 900mA Maximum Output Current (1.8A ILIM Option, Boost Mode 3.0VIN, 3.3VOUT)
  • 96% Peak Efficiency (3.3VIN, 3.3VOUT)
  • SKIP Mode for Higher Light-Load Efficiency
  • 6μA Ultra-Low Typical Quiescent Current (At TJ = +25°C)
  • 2.5MHz Nominal Switching Frequency
  • Enable Pin
  • GPIO Pins for System Design Convenience
    • FPWM (Forced PWM) Mode Selection Pin
    • POK Indicator Pin
  • UVLO, Soft-Start, Active-Output Discharge, Overcurrent, and Thermal Shutdown Protections
  • 1.61mm x 2.01mm, 12-Bump WLP

Applications/Uses

  • 1-Cell Li+ Battery Powered Equipment
  • Smartphones/Portable/Wearables
  • Internet of Things (IoT) Devices
  • NB-IoT Devices

MAX77827EVKIT: Evaluation Kit for the MAX77827

Quality and Environmental Data

Request Reliability Report for: MAX77827 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • EE-Sim: Design & Simulate MAX77827
  • CAD Symbols and Footprints

  • MAX77827BEWC+T
  • MAX77827CEWC+T
  • MAX77827DEWC+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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