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High-Efficiency Buck-Boost Regulator with 5A Switches

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

Product Details

Key Features

Applications/Uses

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 2.3
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.6
VOUT1 (V) (max) 5.14
IOUT1 (A) (max) 3
Switch Type Internal
Preset VOUT (V) 3.4
VOUT1 Tolerance (±%) 1
Output Adjust. Method Preset
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (max) 5
# DC-DC Outputs 1
Alternate Topology Step-Down
Step-Up
Switching Frequency (kHz) 2500
Design Tools EE-Sim
Package/Pins WLP/20
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
1.1
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Parameters

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 2.3
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.6
VOUT1 (V) (max) 5.14
IOUT1 (A) (max) 3
Switch Type Internal
Preset VOUT (V) 3.4
VOUT1 Tolerance (±%) 1
Output Adjust. Method Preset
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (max) 5
# DC-DC Outputs 1
Alternate Topology Step-Down
Step-Up
Switching Frequency (kHz) 2500
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=8135', '')
Package/Pins WLP/20
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
1.1

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

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 ›

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Simplified Block Diagram

MAX77816: Typical Application Circuit MAX77816:Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .