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

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

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet 1 Cell, Step-Up Two-Way Pager System IC Oct 01, 1998

Support & Training

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Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Key Features

  • 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

Applications/Uses

  • 1-Cell Powered Handheld Equipment
  • GPS Receivers
  • Two-Way Paging

Description

The MAX847 is a complete power-supply and monitoring system for two-way pagers or other low-power digital communications devices. It requires few external components. Included on-chip are:

  • A 1-cell input, 80mA output, synchronous-rectified boost DC-DC regulator with a digitally controlled +1.8V to +4.9V output
  • Three low-noise linear-regulator outputs
  • Three DAC-controlled comparators for software- driven 3-channel A/D conversion
  • SPI™-compatible serial interface
  • Reset and low-battery (LBO) warning outputs
  • Charger for NiCd, NiMH, lithium battery, or storage capacitor for RF PA power or system backup
  • Two 1.8Ω (typical) serial-controlled open-drain MOSFET switches


An evaluation kit for the MAX847 (MAX847EVKIT) is available to aid in design and prototyping.

Simplified Block Diagram

MAX847: Typical Operating Circuit MAX847: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet 1 Cell, Step-Up Two-Way Pager System IC Oct 01, 1998

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.