Data Sheet
Rev.
0
1
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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