MAX20363

PRODUCTION

PPG Optimized Buck-Boost Converter with 500mA Output Current and Ultra-Fast DVS Capability

Data Sheet (Rev. 1) Product Selection Table
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Overview

  • Extend System Runtime
    • Ultra-fast dynamic voltage scaling with direct AFE control
    • Low, 2.5μA (typical) quiescent current
    • 96% peak efficiency
  • Low, Continuous Noise Profile
    • No post-filtering LDO required in PPG systems
    • No discontinuities across operating voltage range
  • Adaptable Load Transient Response
    • Fast load transient response minimizes AFE settling time
    • FAST mode pre-triggers load response and improves load transient

The MAX20363 is an ultra-low quiescent current, non-inverting buck-boost converter with 500mA output current capability. The MAX20363 is intended for applications that require long run times while also demanding bursts of high current. The device employs a proprietary control algorithm that seamlessly transitions between buck, buck-boost, and boost modes, minimizing discontinuities and subharmonics in the output voltage ripple. The low 1.8V input voltage allows the device to be powered from a variety of sources such as lithium ion rechargeable and lithium primary batteries. The MAX20363 is designed to minimize inductance and capacitance requirements to keep the overall solution size as small as possible.

The MAX20363 is optimized for powering optical photoplethysmogram (PPG) systems. The ultra-fast dynamic voltage scaling (DVS) capability allows the device to transition quickly between output voltages and enable in-frame scaling of LED supply voltage. Additionally, the low output ripple and fast, predictable transient response maximizes the signal-to-noise ratio (SNR) of high-performance optical PPG analog-front-end (AFE).

The MAX20363 is available in an 18-bump, 2.43mm x 1.25mm WLP package, with 0.4mm pitch.

APPLICATIONS

  • Biometric Optical Sensing (example, PPG)
MAX20363
PPG Optimized Buck-Boost Converter with 500mA Output Current and Ultra-Fast DVS Capability
MAX20363 Functional Block Diagarm MAX20363 Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

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Software Resources

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Tools & Simulations

Software Development 1

Evaluation Kits

eval board
schematic 1
schematic 2
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MAX20363EVKIT

Evaluation Kit for MAX20363

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Features and Benefits

  • Ultra-Fast Dynamic Voltage Scaling (DVS) with Direct AFE Control
  • USB-Power Option
  • Flexible Configuration
  • On-Board Battery Simulation
  • Sense Test Point for Output-Voltage Measurement
  • Windows® 8/Windows 10-Compatible Graphical User Interface (GUI) Software
  • Fully Assembled and Tested

Product Details

The MAX20363 evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating MAX20363, non-inverting buck-boost converter for powering optical photoplethysmogram (PPG) systems.

The device is configurable through an I2C interface that allows for programming various functions and reading device status. The EV kit GUI application sends commands to the MAXPICO2PMB# adapter board to configure the device.

The EV kit comes standard with the MAX20363 EV kit version IC installed.
MAX20363EVKIT
Evaluation Kit for MAX20363
MAX20363EVKIT Board Photo Angle View MAX20363EVKIT Board Photo Top View MAX20363EVKIT Board Photo Bottom View

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