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MAX1765 - 800mA / Low-Noise / Step-Up DC-DC Converter

Description

The MAX1765 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications.

This device operates at a high 1MHz fixed frequency while maintaining an exceptionally low quiescent supply current (200µA).

Features

  • analog soft-start and currentlimit functions to permit optimization of efficiency, external component size, and output voltage ripple. The MAX1765 comes in a 16-pin QSOP package and a thermally enhanced 16-pin TSSOP-EP. ____________________________Features o High-Efficiency Step-Up Converter Up to 93% Efficiency Adjustable Output from +2.5V to +5.5V Up to 800mA Output PWM Synchronous-Rectified Topology 1MHz Operating Frequency (or Sync) o LDO Linear Regulator 500mA LDO Linear Regulator 2.85V Li.

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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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19-1805; Rev 0; 12/00 800mA, Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator MAX1765 General Description The MAX1765 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. This device operates at a high 1MHz fixed frequency while maintaining an exceptionally low quiescent supply current (200µA). Its small external components and tiny package make this device an excellent choice for small hand-held applications that require the longest possible battery life. The MAX1765 uses a synchronous-rectified pulsewidth-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from a wide range of input sources, such as one to three alkaline or NiCd/NiMH cells or a single lithium-ion (Li+) cell.
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