MAX1864EVKIT

Evaluation Kit for the MAX1864


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Description

The MAX1864 evaluation kit (EV kit) demonstrates the MAX1864’s standard application circuit. This EV kit operates from 8V to 24V, generating three positive output voltages.

The MAX1864 EV kit includes a current-mode synchronous step-down controller and two positive regulator gain blocks. The main synchronous step-down controller provides a 3.3V output voltage with 1A output current from an 8V to 24V input voltage range. The positive regulator gain blocks use an external PNP pass transistor to generate 2.5V with 300mA output current from the main 3.3V output, and 5V with 100mA output current using coupled windings from the step-down converter. The EV kit operates at 200kHz switching frequency, allowing the use of low-cost aluminum electrolytic capacitors and a low-cost power transformer.

This EV kit is a fully assembled and tested circuit board. It also allows the evaluation of other main output voltages in the 1.236V to 5.5V range by installing feedback resistors R8 and R9.

Key Features

  • 8V to 24V Input Voltage Range
  • Preset 3.3V Main Output Voltage
  • 1A Main Output Current
  • 200kHz Switching Frequency
  • No Current-Sense Resistor
  • Linear Regulator Output Voltages
    • 2.5V at 300mA
    • 5.0V at 100mA
  • Adjustable Output Voltages
  • Power-Good Output
  • 16-Pin QSOP Package
  • Low-Cost Components
  • Fully Assembled and Tested

Applications/Uses

  • Set-Top Boxes
  • Wireless Local Loop (WLL)
  • xDSL, Cable, and ISDN Modems

Quality and Environmental Data

Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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.

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