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MAX77816

MAX77816

High-Efficiency Buck-Boost Regulator with 5A Switches

98% Efficiency Buck Boost with I2C Interface Delivering >3A of Continuous Output Current

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Overview

Description

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.

Design Solution: Boost the Run-Time of Portable Electronics with a One-Two Punch ›

MAX77816: Typical Application Circuit MAX77816:Typical Application Circuit Enlarge+

Key Features

  • Buck and Boost Operation Including Seamless Transition between Buck and Boost Modes
    • 2.3V to 5.5V VIN Range
    • 2.60V to 5.14V VOUT with 20mV Step
    • 3A Minimum Continuous Output Current (VINBB ≥ 3.0V, VOUTBB = 3.3V)
    • Burst Current: 3.6A Minimum Output Current for 800μs (VINBB ≥ 3.0V, VOUTBB = 3.3V)
  • I2C Serial Interface Allows Dynamic VOUT 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

Applications/Uses

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

Parametric Specs

See parametric specs for Step-Down/Up Switching Regulators (31)


Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		IOUT1
(A)		Switch TypeOper. Freq.
(kHz)		FeaturesDesign ToolsPackage/PinsOper. Temp.
(°C)		Budgetary
Price
minmaxminmaxmaxSee Notes
MAX77816 2.35.52.65.143Internal2500
Fixed Freq./PWM
Reset Output
EE-Sim
WLP/20
-40 to +85$1.10 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources


MAX77816EVKIT: Evaluation Kit for the MAX77816

Additional Resources

Design Solution: Boost the Run-Time of Portable Electronics with a One-Two Punch ›

How to Achieve a Noninverting Output with a 4-Switch Buck-Boost Converter Advantages of Using the MAX77816 Buck-Boost Regulator for Seamless Power Supply Transitions

Tools & Models

  • EE-Sim: Design & Simulate MAX77816
  • MAX77816 SIMPLIS Schematic

    •

    Quality And Environmental

    Request Reliability Report for: MAX77816 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    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.

    Quality Management System >
    Environmental Management System >

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    Tools & Models

    Reference Designs