MAX1759

PRODUCTION

Buck/Boost Regulating Charge Pump in µMAX

Industry's Smallest 100mA Buck/Boost Solution

Data Sheet (Rev. 1) Product Selection Table
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Overview

  • Regulated Output Voltage (Fixed 3.3V or Adjustable 2.5V to 5.5V)
  • 100mA Guaranteed Output Current
  • +1.6V to +5.5V Input Voltage Range
  • Low 50µA Quiescent Supply Current
  • 1µA Shutdown Mode
  • Load Disconnected from Input in Shutdown
  • High 1.5MHz Operating Frequency
  • Uses Small Ceramic Capacitors
  • Short-Circuit Protection and Thermal Shutdown
  • Small 10-Pin µMAX Package

The MAX1759 is a buck/boost regulating charge pump that generates a regulated output voltage from a single lithium-ion (Li+) cell, or two or three NiMH or alkaline cells for small hand-held portable equipment. The MAX1759 operates over a wide +1.6V to +5.5V input voltage range and generates a fixed 3.3V or adjustable (2.5V to 5.5V) output (Dual Mode™). Maxim's unique charge-pump architecture allows the input voltage to be higher or lower than the regulated output voltage. Despite its high 1.5MHz operating frequency, the MAX1759 maintains low 50µA quiescent supply current.

Designed to be an extremely compact buck/boost converter, this device requires only three small ceramic capacitors to build a complete DC-DC converter capable of generating a guaranteed 100mA (min) output current from a +2.5V input. For added flexibility, the MAX1759 also includes an open-drain power-OK (POK) output that signals when the output voltage is in regulation.

The MAX1759 is available in a space-saving 10-pin µMAX package that is 1.09mm high and half the size of an 8-pin SO.

Applications

  • Backup Battery Boost Converters
  • Li+ Battery-Powered Applications
  • Miniature Equipment
  • Translators
MAX1759
Buck/Boost Regulating Charge Pump in µMAX
MAX1759: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 3

Technical Articles 3

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Charge Pumps 5
MAX1730
PRODUCTION 50mA, Regulated, Step-Down Charge Pump for 1.8V or 1.9V Logic
MAX619
RECOMMENDED FOR NEW DESIGNS Regulated 5V Charge Pump DC-DC Converter
MAX682
PRODUCTION 3.3V Input to Regulated 5V Output Charge Pumps
MAX683
3.3V Input to Regulated 5V Output Charge Pumps
MAX684
3.3V Input to Regulated 5V Output Charge Pumps
Switching Regulators & Controllers 3
MAX1672
PRODUCTION Step-Up/Down DC-DC Converter in QSOP Package
MAX710
PRODUCTION 3.3V/5V or Adjustable, Step-Up Step-Down DC-DC Converters
MAX711
PRODUCTION 3.3V/5V or Adjustable, Step-Up Step-Down DC-DC Converters
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