MAX847

PRODUCTION

1 Cell, Step-Up Two-Way Pager System IC

Complete Power Supply and Monitoring System with SPI™ Interface Simplifies Design, Saves Cost and Space

Data Sheet (Rev. 1a) Product Selection Table
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Overview

  • 80mA Output from 1 Cell at 90% Efficiency
  • 13µA Idle Mode™ (coast) Current
  • Selectable Low-Noise PWM or Low-Current Operation
  • PWM Operating Frequency Synchronized to Seven Times an External Clock Source
  • Operates at 270kHz with No External Clock
  • Automatic Backup-Battery Switchover
MAX847
1 Cell, Step-Up Two-Way Pager System IC
MAX847: Typical Operating Circuit
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Documentation

Data Sheet 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 1
MAX769
Obsolete 2 or 3 Cell, Step-Up/Down, Two-Way Pager System IC
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Evaluation Kits

MAX847EVKIT

Evaluation Kit for the MAX847

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Features and Benefits

  • 0.8V to 1.8V (1-cell boost) Battery Input Voltage
  • 1.8V to 4.9V Digitally Adjustable Output Voltage
  • Up to 80mA Total Output Current
  • Three Low-Noise Voltage Regulators
  • Charger for Small NiCd/NiMH/Lithium Battery or Storage Capacitor
  • 270kHz Switching Frequency
  • 15µA Idle Mode™ Current
  • Digitally Controlled 1.8Ω Switches for Vibrators, Beepers, etc.
  • Reset and Low-Battery Outputs
  • Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX847 evaluation kit (EV kit) provides a platform for evaluating the features of the MAX847. The MAX847 converts a 1-cell, 0.8V to 1.8V battery voltage to four separate output voltages. The main output voltage at OUT is digitally controlled from 1.8V to 4.9V in 100mV steps by a 3-wire SPI™ serial interface. OUT provides up to 80mA. The other outputs (REG1, REG2, and REG3) are low-noise linear-regulator outputs. The MAX847 offers numerous features for two-way paging and other low-power wireless designs. Consult the MAX847 data sheet for details. The MAX847 EV kit is a fully assembled and tested surface-mount circuit board.

The MAX769 is similar to the MAX847 except that it contains a buck/boost DC-DC converter (for 2-cell or 3-cell inputs) rather than a boost-only converter (for 1-cell inputs). To evaluate the MAX769, please order the MAX769EVKIT.

Applications

  • 1-Cell Powered Handheld Equipment
  • GPS Receivers
  • Two-Way Paging
MAX847EVKIT
Evaluation Kit for the MAX847

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