Data Sheet Rev. 4
CN | JP 1 View All

Overview

Features and Benefits

  • Low 0.8V to 6V Input Supply Voltage
  • New µMAX® Package
  • 85% Efficiency at 100mA
  • 25µA Quiescent Current
  • 1µA Shutdown Mode
  • 125mA and 500mA Switch Current Limits Permit Use of Low-Cost Inductors
  • Up to 500kHz Switching Frequency
  • ±1.5% Reference Tolerance Over Temperature
  • Low-Battery Detector (LBI/LBO)
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

The MAX856 evaluation kit (EV kit) is a fully assembled and tested surface-mount printed circuit board. It can also evaluate the MAX858 or the adjustable-output MAX857/MAX859.

The MAX856—MAX859 are CMOS, step-up, DC-DC switching regulators for small, low input voltage or battery-powered systems. The MAX856/MAX858 accept a positive input voltage between 0.8V and 6V and convert it to a higher, pin-selectable output voltage of 3.3V or 5V. The MAX857/MAX859 adjustable versions accept 0.8V to 6V input voltages and generate a higher, adjustable output voltage in the 2.7V to 6V range. Typical full-load efficiencies for the MAX856-MAX859 are greater than 85%.

A movable jumper on the EV kit selects either a 3.3V or 5.0V output voltage. Additional pads on the board's solder side accommodate resistors for the LBI/LBO low-battery detector or MAX857/MAX859 output adjustment.

Applications

  • 2-Cell and 3-Cell Battery-Operated Equipment
  • 3.3V to 5V Step-Up Conversion
  • Glucose Meters
  • Medical Instrumentation
  • Palmtop Computers
  • Personal Data Communicators/Computers
  • Portable Data-Collection Equipment

Applicable Parts

Documentation & Resources

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