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MAX684 - 3.3V-Input to Regulated 5V-Output Charge Pumps

General Description

The MAX682/MAX683/MAX684 charge-pump regulators generate 5V from a 2.7V to 5.5V input.

They are specifically designed to serve as high-efficiency auxiliary supplies in applications that demand a compact design.

Key Features

  • o Ultra-Small: 1µF Capacitors per 100mA of Output Current o No Inductors Required o 1.1mm Height in µMAX Package (MAX683/MAX684) o Up to 250mA Output Current (MAX682) o Regulated ±4% Output Voltage o 50kHz to 2MHz Adjustable Switching Frequency o 2.7V to 5.5V Input Voltage o 100µA Quiescent Current in Pulse-Skipping Mode o 0.1µA Shutdown Current MAX682/MAX683/MAX684.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-0177; Rev 1; 8/98 3.3V-Input to Regulated 5V-Output Charge Pumps General Description The MAX682/MAX683/MAX684 charge-pump regulators generate 5V from a 2.7V to 5.5V input. They are specifically designed to serve as high-efficiency auxiliary supplies in applications that demand a compact design. The MAX682, MAX683, and MAX684 deliver 250mA, 100mA, and 50mA output current, respectively. These complete 5V regulators require only one resistor and three external capacitors—no inductors are needed. High switching frequencies (externally adjustable up to 2MHz) and a unique regulation scheme allow the use of capacitors as small as 1µF per 100mA of output current. The MAX683/MAX684 are offered in a spacesaving 8-pin µMAX package that is only 1.