MAX769

2 or 3 Cell, Step-Up/Down, Two-Way Pager System IC

Complete Power Supply and Monitoring System Simplifies Design, Saves Cost and Space

Data Sheet (Rev. 1)
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Part Details

  • Regulated Step-Up/Step-Down Operation
  • 80mA Output from 3 Cells
  • 85% Efficiency
  • 13µA Idle Mode™ (coast) Current
  • Selectable Low-Noise PWM or Low-Current PFM Operation
  • PWM Operating Frequency Synchronized to Seven Times an External Clock Source
  • Operates at 270kHz with No External Clock
  • Automatic Backup-Battery Switchover
MAX769
2 or 3 Cell, Step-Up/Down, Two-Way Pager System IC
MAX769: Typical Operating Circuit
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Documentation

Data Sheet 1

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Hardware Ecosystem

Parts Product Life Cycle Description
PMIC (DC/DC, PowerPath, and Battery Charger) 1
MAX847
PRODUCTION 1 Cell, Step-Up Two-Way Pager System IC
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Evaluation Kits

MAX769EVKIT

Evaluation Kit for the MAX769

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Features and Benefits

  • 1.5V to 5.5V (buck-boost) 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, and Other Low-Power Wireless Designs
  • Reset and Low-Battery Outputs
  • Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX769 evaluation kit (EV kit) provides a platform for evaluating the features of the MAX769. The MAX769 converts a 2-cell or 3-cell, 1.5V to 5.5V 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 MAX769 contains numerous other features for two-way paging and other low-power wireless designs. Consult the MAX769 data sheet for details. The MAX769 EV kit is a fully assembled and tested surface-mount circuit board.

The MAX847 is similar to the MAX769 except that it contains a boost DC-DC converter (for 1-cell inputs) rather than a buck-boost converter (for 2-cell or 3-cell inputs). To evaluate the MAX847, please order the MAX847EVKIT.

Applications

  • 2- or 3-Cell-Powered Handheld Equipment
  • GPS Receivers
  • Two-Way Paging
MAX769EVKIT
Evaluation Kit for the MAX769

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