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Overview

Features and Benefits

  • 2.5V to 5.5V Input Supply with Full Functionality
  • Dual-Phase Interleave Step-Up DC-DC Converter
    • True Shutdown™ Output
    • 2A Guaranteed Output Current for VIN > 2.5V and VOUT ≤ 4.0V
    • Adaptive Output-Voltage Regulation Ensuring Highest System Efficiency
    • Over 90% Peak Efficiency
    • 3.125% Minimum Duty Cycle
    • On-Chip Power MOSFET and Synchronous Rectifier
    • Up to 4MHz PWM Switching Frequency per Phase
    • Small 0.47µH Inductor per Phase
  • High-Side Torch/Flash LED Current Regulator
    • I2C-Programmable Flash Output Current (15.625mA to 1000mA in 15.625mA Steps)
    • I2C-Programmable Torch Output Current (3.91mA to 250mA in 3.91mA Steps for Non-PWM Dimming) (125mA to 1000mA in 125mA Steps for PWM Dimming with Programmable Duty Cycle from 3.125% to 25% in 3.125% Steps)
    • Low-Dropout Voltage (80mV, typ) at 1000mA
  • I2C-Programmable Flash Safety Timer
  • I2C-Programmable Torch Safety Timer
  • Dual Independent TX_MASK Inputs for Limiting Flash Current During Tx Events
  • Open/Shorted LED Detection
  • NTC Monitoring for LED Protection
  • Overvoltage Protection
  • MAXFLASH 2.0 Preventing System Latchup
  • Thermal-Shutdown Protection
  • < 1µA Shutdown Current
  • RoHS Compliant
  • Proven PCB Layout
  • Fully Tested and Assembled

Product Details

The MAX77387 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the highly integrated MAX77387 dual-phase adaptive step-up converter with 2A flash driver. The device’s flash driver integrates an adaptive 2A dual-phase PWM step-up DC-DC converter and two 1000mA white LED camera flash/movie high-side current regulators.
The EV system includes the EV kit and a MINIQUSB command module that provides the I2C interface to control individual output on/off, the step-up output voltage, movie/ flash current, and flash/torch timer duration settings.

Applications

  • Cell Phones and Smartphones
  • Tablets

Applicable Parts

Documentation & Resources

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  • Data Sheets (1)
    • Document Type

    Tools & Simulations

    Software Development

    MAX77387 Evaluation Kit Software, 1.0.0
    ZIP

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    Pricing displayed is based on 1-piece.

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.